SERGIO CRISTALLO CURRICULUM VITAE
Family name: CRISTALLO
Date of birth : 07/11/1976
Nacionality: ITALIAN
Forename: SERGIO
Gender: M
Status: married
PRESENT PROFESIONAL POSITION
Institution: Osservatorio Astronomico di Teramo – INAF
Address: via Maggini sn, 64100 TERAMO
Country: ITALY
Administrative status: Permanent Staff
Telephone: 00390861439703
E-mail: [email protected]
Activities:
 Theoretical Research in Computational Stellar Physics;
 Responsible for didactic and scientific divulgation at Osservatorio Astronomico di Teramo.
Field of study (UNESCO codes): 21,2101.10,2101.11,2101.12
PRESENT RESEARCH AREA
Low mass AGB Stars (1<M/MSUN<3) are among the most important polluters of the Milky Way, because of
the strong winds eroding their chemically enriched envelopes. In the AGB phase, the material processed
during the alternating series of H and He burnings is recurrently mixed within the convective zones
generated by Thermal Pulses (TPs) and then partially mixed with the surface by the so called Third
Dredge Up (TDU) episodes. As a matter of fact, MS, S, C(N) and some post-AGB stars are enriched in C
and s-process elements and the spectroscopic detection of unstable Tc demonstrates that the s process
is at work in these stars. Within this context, at the Teramo Observatory I started a longstanding program
devoted to the study of the physical and chemical evolution of low mass AGB stars by means on the
FRANEC (FRascati Raphson-Newton Evolutionary) code.
Among the most important results we achieved, there is the explanation of the mechanism of neutron
production, which controls the s-process nucleosynthesis in low-mass AGB. We obtained the formation of
the so-called 13C-pocket, which represents the main neutron source in low mass AGB stars. Another
improvement has been the coupling of the code with a full nuclear network, from H up to Pb-Bi, at the
termination point of the s-process path. For each model we provide elemental distributions, isotopic ratios
and yields. Our theoretical data well fit with observational evidences and are available on line at the
FRUITY database web pages. The FRANEC models benefit of another improvement, whose effects are
particularly important at low metallicity: the introduction of C-enhanced low temperature opacities. The
AGB models computed with the aforementioned opacity tables succeed in reproducing the photometric
and spectroscopic properties of their observational counterparts. In particular, the low effective
temperature (3500-4000 K) of low metallicity C stars belonging to intermediate-age stellar populations of
dwarf spheroidal galaxies (e.g. Draco) can be naturally reproduced when more appropriate opacities are
used. Finally, in the case of very metal poor AGBs, we found that, for a given metallicity, there exists a
lower mass limit for which normal AGB evolution may occur. Stars with smaller initial mass experience a
protons engulfment during the first fully developed TP, which leads to a peculiar s-process
nucleosynthesis (with a strong overproduction of the ls component), a low 12C/13C, a significant synthesis
1
of primary 14N and of 7Li. Later on, a deep TDU occurs. Since in the envelope the C/O becomes grater
than 1, the large N abundance favors the formation of CN molecules, thus inducing a further increase of
the radiative opacities.
Our models are available to the community at the web pages of the FRUITY database (www.oateramo.inaf.it/fruity/): a database entirely dedicated to the nucleosynthesis ol AGB stars where yields and
pulse by pulse surface (elemental and isotopic) compositions can be downloaded.
I’m currently working on Intermediate Mass AGB Stars and rotating AGB stars.
ACADEMIC BACKGROUND
Bachelor
Centre
Date
PHYSICS
UNIVERSITA’ DEGLI STUDI DI TORINO
Ph.D.
COMPUTATIONAL
ASTROPHYSICS
Centre
UNIVERSITA’ DI TERAMO
OSS. ASTRON. TERAMO
15-07-2000
Thesis Supervisor
Date
Prof. O. STRANIERO
05-07-2006
PAST NON SCIENTIFIC EXPERIENCE
Position
Industry
Start date
End date
TECHNICIAN
Marconi Communications
01/2001
11/2002
PAST SCIENTIFIC EXPERIENCE
Position
R&D Centre
Institution
Start date
End date
FORWARD CONTRACT UNIV. STUDI TORINO
DIPARTIM. FISICA
09/2000
12/2000
FORWARD CONTRACT UNIV. STUDI TORINO
DIPARTIM. FISICA
12/2002
05/2003
POST-DOC POSITION
OSS. ASTR. TERAMO
INAF- TERAMO
06/2006
05/2009
Juan de la Cierva
(Post-doc)
UNIV. GRANADA
DEP. FIS. TEORICA
06/2009
Y DEL COSMOS
06/2011
LANGUAGES
Language
Speaking
Reading
Writing
ITALIAN
PERFECTLY
PERFECTLY
PERFECTLY
ENGLISH
GOOD
PERFECTLY
PERFECTLY
SPANISH
GOOD
PERFECTLY
GOOD
FRENCH
SCOLASTIC
SCOLASTIC
SCOLASTIC
2
PARTICIPATION IN RESEARCH PROJECTS
PROJECT TITLE: A study of relevant nuclear reactions for astrophysics (CICYT/INFN)
FINANCIAL ENTITY: 5400 euro
LENGHT
FROM: 2004
TO: 2005
PRINCIPAL INVESTIGATOR: Abia C. (Univ. Granada)
PROJECT TITLE: Nuclesynthesis in giant stars at different metallicities (PRIN- MIUR)
FINANCIAL ENTITY: 48400 euro
LENGHT
FROM: 2004
TO: 2006
PRINCIPAL INVESTIGATOR: Busso M. (Univ. Perugia); Straniero O. (local research unit investigator)
PROJECT TITLE: Probing the nature of Blue Stragglers and millisecond pulsar: two key stellar
popolulations to trace cluster dynamics (PRIN- INAF)
FINANCIAL ENTITY: 15000 euro
LENGHT
FROM: 2005
TO: 2007
PRINCIPAL INVESTIGATOR: Ferraro F. (Univ. Bologna); Straniero O. (local research unit investigator)
PROJECT TITLE: A study of relevant nuclear reactions for astrophysics (CICYT/INFN)
FINANCIAL ENTITY: 4850 euro
LENGHT
FROM: 2006
TO: 2007
PRINCIPAL INVESTIGATOR: Abia C. (Univ. Granada)
PROJECT TITLE: Identification of SN Ia progenitors and comprehension of the physical explosive
mechanisms (PRIN- MIUR)
FINANCIAL ENTITY: 44420 euro
LENGHT
FROM: 2006
TO: 2008
PRINCIPAL INVESTIGATOR: Busso M. (Univ. Perugia); Straniero O. (local research unit investigator)
PROJECT TITLE: The fluorine production in AGB stars (REF: FPA2008-03908-E/INFN)
FINANCIAL ENTITY: 3600 euro
LENGHT
FROM: 2009
TO: 2010
PRINCIPAL INVESTIGATOR: Abia C.. (Univ. Granada)
PROJECT TITLE: Two challenges in modern stellar physics: SN progenitors and AGB stars (REF:
AYA2008-04211-C02-02/AYA)
FINANCIAL ENTITY: 38500 euro
3
LENGHT
FROM: 2009
TO: 2012
PRINCIPAL INVESTIGATOR: Dominguez I. (Univ. Granada)
PROJECT TITLE: Stellar evolution and nucleosynthesis (FQM-292)
FINANCIAL ENTITY: 2100 euro
LENGHT
FROM: 2010
TO: 2011
PRINCIPAL INVESTIGATOR: Abia, C. (Univ. Granada)
PROJECT TITLE: CICODE-Universidad de Granada: Academic Cooperation with the Palestinian
Universities in Gaza
FINANCIAL ENTITY: 4800 euro
LENGHT
FROM: 2010
TO: 2011
PRINCIPAL INVESTIGATOR: Dominguez I. & Artur Schmitt (Univ. Granada)
PROJECT TITLE: Theoretical and Observational Analysis of the Late Phases of Stellar Evolution:
Missing Physical Processes in AGB stars and Thermonuclear Supernovae (AYA2011-22460)
FINANCIAL ENTITY: 116000 euro
LENGHT
FROM: 2012
TO: 2014
PRINCIPAL INVESTIGATOR: Dominguez I. (Univ. Granada)
4
PUBLICATIONS
AUTHORS (in order of authorship): Ávila, Janaína N., Lugaro, Maria, Ireland, Trevor R., Gyngard, Frank,
Zinner, Ernst, Cristallo, Sergio, and 4 coauthors
TITLE: Tungsten Isotopic Compositions in Stardust SiC Grains from the Murchison Meteorite: Constraints
on the s-process in the Hf-Ta-W-Re-Os Region
JOURNAL/BOOK TITLE: ApJ, 744, 49. (REFERRED)
DATE OF PUBLICATION (*): 2012
AUTHORS (in order of authorship): Cristallo, S., Piersanti, L., Straniero, O,. and 6 coauthors
TITLE: Evolution, Nucleosynthesis, and Yields of Low-mass Asymptotic Giant Branch Stars at Different
Metallicities. II. The FRUITY Database
JOURNAL/BOOK TITLE: ApJS, 197, 17. (REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Bisterzo, S., Gallino, R., Straniero, O., Cristallo, S., Kaeppeler, F.
TITLE: The s-process in low-metallicity stars - II. Interpretation of high-resolution spectroscopic
observations with asymptotic giant branch models
JOURNAL/BOOK TITLE: MNRAS, 418, 284. (REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Palmerini, S., Cristallo, S., and 5 coauthors
TITLE: Deep Mixing in Evolved Stars. II. Interpreting Li Abundances in Red Giant Branch and Asymptotic
Giant Branch Stars
JOURNAL/BOOK TITLE: ApJ, 741, 26 (REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship):, Gyngard, F., Nittler, L. R., Zinner, E., Jose, J., Cristallo, S.
TITLE: New Reaction Rates and Implications for Nova Nucleosynthesis and Presolar Grains
JOURNAL/BOOK TITLE: LPI, 42, 2675 (NOT REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Abia, C., Cunha, K., Cristallo, S., and 5 coauthors
TITLE: The First Fluorine Abundance Determinations in Extragalactic AGB Carbon Stars
JOURNAL/BOOK TITLE: ApJ Lett., 737, 8 (REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Gallino, R., Straniero, O., Zinner, E., Jadhav, M., Piersanti, L.,
Cristallo, S., Bisterzo, S.
TITLE: Nucleosynthesis origin of PG 1159 stars, Sakurai’s objects and of rare subclass of presolar grains
5
JOURNAL/BOOK TITLE: ASP Conf. Series, 445, 143 (NOT REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Palmerini, S., Busso, M., La Cognata, M., Cristallo, S.
TITLE: Nucleosynthesis in Non-Convective Mixing of Low-Mass Red Giants: Effects of New Reaction
Rates
JOURNAL/BOOK TITLE: ASP Conf. Series, 445, 39 (NOT REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Straniero, O., Cristallo, S., Piersanti, L., Gallino, R., Dominguez, I.,
Bisterzo, S.
TITLE: Evolution and nucleosynthesis of extremely metal-poor AGB stars
JOURNAL/BOOK TITLE: ASP Conf. Series, 445, 23 (NOT REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Dominguez, I., Cristallo, S., Straniero, O., Piersanti, L., Di Rico, G.,
Gallino, R., Abia, C.
TITLE: The FRUITY Database: Chemical Features of Low Mass AGB Stars
JOURNAL/BOOK TITLE: ASP Conf. Series, 445, 57 (NOT REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Palmerini, S., La Cognata, M., Cristallo, S., Busso, M.
TITLE: Deep Mixing in Evolved Stars: I. The Effect of Reaction Rate Revisions from C to Al
JOURNAL/BOOK TITLE: ApJ, 729, 3 (REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Mucciarelli, A., Cristallo, S., and 10 coauthors
TITLE: NGC 1866: a milestone for understanding the chemical evolution of stellar populations in the LMC
JOURNAL/BOOK TITLE: MNRAS, 413, 837 (REFERRED)
DATE OF PUBLICATION (*): 2011
AUTHORS (in order of authorship): Gallino, R., Bisterzo, S., Cristallo, S., Straniero, O.
TITLE: The Role of Primary 16O as a Neutron Poison in AGB stars and Fluorine primary production at
Halo Metallicities
JOURNAL/BOOK TITLE: MemSaIt, 81, 998. (NOT REFERRED)
DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Abia, C., De Laverny, P., Cunha, K., Cristallo, S., and 9 coauthors
6
TITLE: Is the problem of 19F abundance in AGB C stars solved?
JOURNAL/BOOK TITLE: MemSaIt, 81, 986. (NOT REFERRED)
DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Bisterzo, S., & Cristallo, S.
TITLE: Low metallicity AGB models: H profile in the 13C-pocket and the effect on the s-process
JOURNAL/BOOK TITLE: MemSaIt, 81, 1095. (NOT REFERRED)
DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Busso, M., Palmerini, S., Maiorca, E., Cristallo, S., Straniero, O.,
Abia, C., Gallino, R., La Cognata, M.
TITLE: On the Need for Deep Mixing in AGB Stars of Low Mass
JOURNAL/BOOK TITLE: APJL, 717, 47 (REFERRED)
DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Abia, C., Cunha, K., Cristallo, S., and 10 coauthors
TITLE: Fluorine Abundances in Galactic Asymptotic Giant Branch Stars
JOURNAL/BOOK TITLE: APJL, 715, 94. (REFERRED)
DATE OF DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Bisterzo, S., Gallino, R., Straniero, O., Cristallo, S., Kaeppeler, F.
TITLE: s-Process in Low Metallicity Stars. I. Theoretical Predictions
JOURNAL/BOOK TITLE: MNRAS 404 1529. (REFERRED)
DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Maguire, K., Di Carlo, E., Smartt, S. J., Pastorello, A.,
Tsvetkov, D. Yu., Benetti, S., Spiro, S., Arkharov, A. A., Beccari, G., Botticella, M. T., Cappellaro, E.,
Cristallo, S., and 13 coauthors
TITLE: Optical and near infrared coverage of SN 2004et: physical parameters and comparison with other
type IIP supernovae
JOURNAL/BOOK TITLE: MNRAS 404 981. (REFERRED)
DATE OF PUBLICATION (*): 2010
AUTHORS (in order of authorship): Zamora, O., Abia, C., Plez, B., Domínguez, I., Cristallo, S.
TITLE: The chemical composition of carbon stars. The R-type stars
JOURNAL/BOOK TITLE: A&A, 508, 909. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Davis, A. M., Gallino, R., Cristallo, S., Straniero, O.
7
TITLE: Asymptotic Giant Branch Stars and Their Influence on the Isotopic Compositions of the Transition
Elements
JOURNAL/BOOK TITLE: M&PSA, 72, 5402D. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Abia, C., de Laverny, P., Recio-Blanco, A., Domínguez, I.,
Cristallo, S., Straniero, O.
TITLE: Fluorine Abundances in AGB Carbon Stars: New Results?
JOURNAL/BOOK TITLE: PASA, 26, 351. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Church, R. P., Cristallo, S., Lattanzio, J. C., Stancliffe, R. J.,
Straniero, O., Cannon, R. C.
TITLE: montage: AGB Nucleosynthesis with Full s-Process Calculations
JOURNAL/BOOK TITLE: PASA, 26, 217. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Husti, L., Gallino, R., Bisterzo, S., Straniero, O., Cristallo, S.
TITLE: Barium Stars: Theoretical Interpretation
JOURNAL/BOOK TITLE: PASA, 26, 176. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Straniero, O., Cristallo, S., Gallino, R.
TITLE: The 13C Pocket in Low-Mass AGB Stars
JOURNAL/BOOK TITLE: PASA, 26, 133. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Lederer, M. T., Lebzelter, T., Cristallo, S., Straniero, O., Hinkle, K. H.,
Aringer, B.
TITLE: The puzzling dredge-up pattern in NGC 1978
JOURNAL/BOOK TITLE: A&A, 502, 913. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Cristallo, S., Straniero, O., Gallino, R., Piersanti, L., Domínguez, I.,
Lederer, M. T.
TITLE: Evolution, Nucleosynthesis, and Yields of Low-Mass Asymptotic Giant Branch Stars at Different
Metallicities
JOURNAL/BOOK TITLE: ApJ, 696, 797. (REFERRED)
DATE OF PUBLICATION (*): 2009
8
AUTHORS (in order of authorship): Abia, C., Recio-Blanco, A., de Laverny, P., Cristallo, S.,
Domínguez, I., Straniero, O.
TITLE: Fluorine in Asymptotic Giant Branch Carbon Stars Revisited
JOURNAL/BOOK TITLE: ApJ, 694, 971. (REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Lebzelter, T., Lederer, M. T., Cristallo, S., Straniero, O., Hinkle, K. H.
TITLE: A study of AGB stars in LMC clusters
JOURNAL/BOOK TITLE: IAUS, 256, 397. (NOT REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Cantiello, M., Cristallo, S., Di Rico, G., Pietrinferni, A., Raimondo, G.
TITLE: 52nd Meeting of the Italian Astronomical Society
JOURNAL/BOOK TITLE: MemSaIt, 80, 5. (NOT REFERRED)
DATE OF PUBLICATION (*): 2009
AUTHORS (in order of authorship): Lebzelter, T., Lederer, M. T., Cristallo, S., Hinkle, K. H., Straniero, O.,
Aringer, B.
TITLE: AGB stars of the intermediate-age LMC cluster NGC 1846. II. Dredge up along the AGB
JOURNAL/BOOK TITLE: A&A, 486, 511. (REFERRED)
DATE OF PUBLICATION (*): 2008
AUTHORS (in order of authorship): Lugaro, M., de Mink, S. E., Izzard, R. G., Campbell, S. W.,
Karakas, A. I., Cristallo, S., Pols, O. R., Lattanzio, J. C., Straniero, O., Gallino, R., Beers, T. C.
TITLE: Fluorine in carbon-enhanced metal-poor stars: a binary scenario
JOURNAL/BOOK TITLE: A&A, 484, 27L. (REFERRED)
DATE OF PUBLICATION (*): 2008
AUTHORS (in order of authorship): Abia, C., de Laverny, P., Wahlin, R., Domínguez, I., Cristallo, S.,
Straniero, O.
TITLE: Analysis of Two Carbon Stars in the Carina Dwarf Spheroidal Galaxy
JOURNAL/BOOK TITLE: AIPC, 1001, 205. (NOT REFERRED)
DATE OF PUBLICATION (*): 2008
AUTHORS (in order of authorship): Pignatari, M., Gallino, R., Cristallo, S., Straniero, O.
TITLE: Abundances of Heavy Elements in PNe and AGB Model Predictions
JOURNAL/BOOK TITLE: AIPC, 1001, 154. (NOT REFERRED)
DATE OF PUBLICATION (*): 2008
9
AUTHORS (in order of authorship): Lebzelter, T., Hinkle, K. H., Lederer, M. T., Cristallo, S., Straniero, O.,
Nowotny, W., Wood, P.
TITLE: Observing Third Dredge Up in NGC 1846
JOURNAL/BOOK TITLE: AIPC, 1001, 56. (NOT REFERRED)
DATE OF PUBLICATION (*): 2008
AUTHORS (in order of authorship): Cristallo, S., Straniero, O., Lederer, M.T.
TITLE: Molecular opacities for low-mass metal-poor AGB stars undergoing the third dredge-up
JOURNAL/BOOK TITLE: ApJ, 667, 489. (REFERRED)
DATE OF PUBLICATION (*): 2007
AUTHORS (in order of authorship): Piersanti, L., Straniero, O., Cristallo, S.
TITLE: A method to derive the absolute composition of the Sun, the solar system, and the stars
JOURNAL/BOOK TITLE: A&A, 462, 1051. (REFERRED)
DATE OF PUBLICATION (*): 2007
AUTHORS (in order of authorship): Lederer, M.T., Lebzelter, T., Cristallo, S., Straniero, O., Aringer, B.,
Hinkle, K.
TITLE: Third Dredge-up in Globular Cluster AGB Stars: Observation Versus Theory
JOURNAL/BOOK TITLE: AIPC, 948, 43. (NOT REFERRED)
DATE OF PUBLICATION (*): 2007
AUTHORS (in order of authorship): Dominguez, I., Abia, C., Cristallo, S., de Laverny P., Straniero, O.
TITLE: AGB Stars: Nucleosynthesis and open problems
JOURNAL/BOOK TITLE: "Highlights of Spanish Astrophysics IV", Springer, 239. (NOT REFERRED)
DATE OF PUBLICATION (*): 2007
AUTHORS (in order of authorship): Husti, L., Gallino, R., Bisterzo, S., Cristallo, S., Straniero, O.
TITLE: Primary production of light and s elements in very metal-poor Asymptotic Giant Branch stars.
JOURNAL/BOOK TITLE: Mem. S.A.It., 78, 523. (NOT REFERRED)
DATE OF PUBLICATION (*): 2007
AUTHORS (in order of authorship): Cristallo, S.
TITLE: s-process nucleosynthesis in Low Mass AGB Stars at different metallicities (Dissertation
Summary)
JOURNAL/BOOK TITLE: PASP, 118, 1363. (REFERRED)
DATE OF PUBLICATION (*): 2006
10
AUTHORS (in order of authorship): Straniero, O., Gallino, R., Cristallo, S.
TITLE: s process in low-mass asymptotic giant branch stars
JOURNAL/BOOK TITLE: Nucl. Phys. A, 777, 311. (REFERRED)
DATE OF PUBLICATION (*): 2006
AUTHORS (in order of authorship): Gallino, R., Bisterzo, S., Husti, L., Kaeppeler, F., Cristallo, S.,
Straniero, O.
TITLE: 22Ne a primary source of neutrons for the s-process and a major neutron poison in very metalpoor asymptotic giant branch stars
JOURNAL/BOOK TITLE: : Proceeding of Science, 100. (NOT REFERRED)
DATE OF PUBLICATION (*): 2006
AUTHORS (in order of authorship): Delaude, D., Gallino, R., Cristallo, S., Straniero, O.
TITLE: Lead Stars at Low Metallicity: Observation versus Theory
JOURNAL/BOOK TITLE: ESO Astrophysics Symposia, Springer-Verlag, 126. (NOT REFERRED)
DATE OF PUBLICATION (*): 2006
AUTHORS (in order of authorship): Gallino, R., Delaude, D., Husti, L., Cristallo, S., Straniero,O., Ryan, S.
TITLE: Predictions of s-process Lead in low-metallicity stars compared with spectroscopic observations
JOURNAL/BOOK TITLE: Nucl. Phys. A, 758, 485. (REFERRED)
DATE OF PUBLICATION (*): 2005
AUTHORS (in order of authorship): Dominguez, I., Abia, C., Straniero, O., Cristallo, S., Pavlenko, Ya.V.
TITLE: First detection of a lithium rich carbon star in the Draco dwarf galaxy: Evidence for a young stellar
population
JOURNAL/BOOK TITLE: A&A, 442, 1045. (REFERRED)
DATE OF PUBLICATION (*): 2004
AUTHORS (in order of authorship): Delaude, D., Gallino, R., Cristallo, S., Straniero, O., Husti, L., Ryan,
S.
TITLE: Lead and s-process elements in stars of various metallicities: AGB predictions compared with
observation
JOURNAL/BOOK TITLE: Mem. S.A.It., 75, 706. (NOT REFERRED)
DATE OF PUBLICATION (*): 2004
AUTHORS (in order of authorship): Straniero, O., Cristallo, S., Gallino, R., Dominguez, I.
11
TITLE: Nucleosynthesis in very metal poor AGB stars
JOURNAL/BOOK TITLE: Mem. S.A.It., 75, 665. (NOT REFERRED)
DATE OF PUBLICATION (*): 2004
AUTHORS (in order of authorship): Abia, C., de Laverny, P., Dominguez, I., Straniero, O., Cristallo, S.,
Plez, B.
TITLE: First chemical analysis of extragalactic carbon stars
JOURNAL/BOOK TITLE: Mem. S.A.It., 75, 607. (NOT REFERRED)
DATE OF PUBLICATION (*): 2004
AUTHORS (in order of authorship): Gallino, R., Arnone, E., Cristallo, S., and 10 coauthors
TITLE: Minute steps on the quest of the s-process
JOURNAL/BOOK TITLE: Nucl. Phys. A, 718, 181. (REFERRED)
DATE OF PUBLICATION (*): 2003
AUTHORS (in order of authorship): Gallino, R., Kaeppeler, F., Reifarth, R., Straniero, O., Cristallo, S.,
Davis, A.M., Dominguez, I.
TITLE: The s-process in meteoritic interstellar grains, a continuos interaction between Nuclear Physics
and Astrophysics
JOURNAL/BOOK TITLE: EAEJA, 13716. (NOT REFERRED)
DATE OF PUBLICATION (*): 2003
AUTHORS (in order of authorship): Straniero, O., Dominguez, I., Cristallo, S., Gallino, R.
TITLE: Low-Mass AGB Stellar Models for 0.003 <= Z <= 0.02: Basic Formulae for Nucleosynthesis
Calculations
JOURNAL/BOOK TITLE: PASA, 20, 389. (REFERRED)
DATE OF PUBLICATION (*): 2003
AUTHORS (in order of authorship): Gallino, R., Pignatari, M., Cristallo, S., Straniero, O., Travaglio, C.,
Busso, M.
TITLE: Pb/eu/ba/zr AGB Predictiions for Globulars and the Halo.
JOURNAL/BOOK TITLE: IAUJD, 4, 27. (NOT REFERRED)
DATE OF PUBLICATION (*): 2003
AUTHORS (in order of authorship): Cristallo, S., Straniero, O., Gallino, R., Herwig, F., Chieffi, A.,
Limongi, M., Busso, M.
TITLE: The formation of the 13C pocket in Asymptotic Giant Branch stars and related nucleosynthesis
JOURNAL/BOOK TITLE: Nucl. Phys. A, 688, 217. (REFERRED)
DATE OF PUBLICATION (*): 2001
12
MOST OUTSTANDING PUBLICATIONS
AUTHORS (in order of authorship): Cristallo, S., Piersanti, L., Straniero, O,. and 6 coauthors TITLE:
Evolution, Nucleosynthesis, and Yields of Low-Mass Asymptotic Giant Branch Stars at Different
Metallicities II: the FRUITY database
JOURNAL/BOOK TITLE: ApJS, 197, 17.
(REFERRED)
DATE OF PUBLICATION (*): 2011
ABSTRACT: By using updated stellar low-mass stars models, we systematically investigate the nucleosynthesis
processes occurring in asymptotic giant branch (AGB) stars. In this paper, we present a database dedicated to the
nucleosynthesis of AGB stars: FRANEC Repository of Updated Isotopic Tables & Yields (FRUITY). An
interactive Web-based interface allows users to freely download the full (from H to Bi) isotopic composition, as it
changes after each third dredge-up (TDU) episode and the stellar yields the models produce. A first set of AGB
models, having masses in the range 1.5 <=M/M sun <= 3.0 and metallicities 1 × 10-3 <= Z <= 2 × 10-2, is discussed.
For each model, a detailed description of the physical and the chemical evolution is provided. In particular, we
illustrate the details of the s-process and we evaluate the theoretical uncertainties due to the parameterization
adopted to model convection and mass loss. The resulting nucleosynthesis scenario is checked by comparing the
theoretical [hs/ls] and [Pb/hs] ratios to those obtained from the available abundance analysis of s-enhanced stars.
On the average, the variation with the metallicity of these spectroscopic indexes is well reproduced by theoretical
models, although the predicted spread at a given metallicity is substantially smaller than the observed one. Possible
explanations for such a difference are briefly discussed. An independent check of the TDU efficiency is provided
by the C-stars luminosity function. Consequently, theoretical C-stars luminosity functions for the Galactic disk and
the Magellanic Clouds have been derived. We generally find good agreement with observations.
AUTHORS (in order of authorship): Cristallo, S., Straniero, O., Gallino, R., Piersanti, L., Domínguez, I.,
Lederer, M. T.
TITLE: Evolution, Nucleosynthesis, and Yields of Low-Mass Asymptotic Giant Branch Stars at Different
Metallicities
JOURNAL/BOOK TITLE: ApJ, 696, 797. (REFERRED)
DATE OF PUBLICATION (*): 2009
ABSTRACT: The envelope of thermally pulsing asymptotic giant branch (TP-AGB) stars undergoing periodic
third dredge-up (TDU) episodes is enriched in both light and heavy elements, the ashes of a complex internal
nucleosynthesis involving p, α, and n captures over hundreds of stable and unstable isotopes. In this paper, new
models of low-mass AGB stars (2 M sun), with metallicity ranging between Z = 0.0138 (the solar one) and Z =
0.0001, are presented. Main features are (1) a full nuclear network (from H to Bi) coupled to the stellar evolution
code, (2) a mass loss-period-luminosity relation, based on available data for long-period variables, and (3)
molecular and atomic opacities for C- and/or N-enhanced mixtures, appropriate for the chemical modifications of
the envelope caused by the TDU. For each model, a detailed description of the physical and chemical evolutions is
presented; moreover, we present a uniform set of yields, comprehensive of all chemical species (from hydrogen to
bismuth). The main nucleosynthesis site is the thin 13C pocket, which forms in the core-envelope transition region
after each TDU episode. The formation of this 13C pocket is the principal by-product of the introduction of a new
algorithm, which shapes the velocity profile of convective elements at the inner border of the convective envelope:
both the physical grounds and the calibration of the algorithm are discussed in detail. We find that the pockets
shrink (in mass) as the star climbs the AGB, so that the first pockets, the largest ones, leave the major imprint on
the overall nucleosynthesis. Neutrons are released by the 13C(α, n)16O reaction during the interpulse phase in
radiative conditions, when temperatures within the pockets attain T ~ 1.0 × 10 8 K, with typical densities of (106107) neutrons cm-3. Exceptions are found, as in the case of the first pocket of the metal-rich models (Z = 0.0138, Z
= 0.006 and Z = 0.003), where the 13C is only partially burned during the interpulse: the surviving part is ingested
in the convective zone generated by the subsequent thermal pulse (TP) and then burned at T ~ 1.5 × 10 8 K, thus
producing larger neutron densities (up to 1011 neutrons cm-3). An additional neutron exposure, caused by the
22
Ne(α, n)25Mg during the TPs, is marginally activated at large Z, but becomes an important nucleosynthesis source
at low Z, when most of the 22Ne is primary. The final surface compositions of the various models reflect the
differences in the initial iron-seed content and in the physical structure of AGB stars belonging to different stellar
populations. Thus, at large metallicities the nucleosynthesis of light s-elements (Sr, Y, Zr) is favored, whilst,
decreasing the iron content, the overproduction of heavy s-elements (Ba, La, Ce, Nd, Sm) and lead becomes
progressively more important. At low metallicities (Z = 0.0001) the main product is lead. The agreement with the
observed [hs/ls] index observed in intrinsic C stars at different [Fe/H] is generally good. For the solar metallicity
13
model, we found an interesting overproduction of some radioactive isotopes, like 60Fe, as a consequence of the
anomalous first 13C pocket. Finally, light elements (C, F, Ne, and Na) are enhanced at any metallicity.
AUTHORS (in order of authorship): Cristallo, S., Straniero, O., Lederer, M.T.
TITLE: Molecular opacities for low-mass metal-poor AGB stars undergoing the third dredge-up
JOURNAL/BOOK TITLE: ApJ, 667, 489. (REFERRED)
DATE OF PUBLICATION (*): 2007
ABSTRACT: The concomitant overabundances of C, N, and s-process elements are commonly ascribed to the
complex interplay of nucleosynthesis, mixing, and mass loss taking place in asymptotic giant branch (AGB) stars.
At low metallicity, the enhancement of C and/or N can be up to 1000 times larger than the original iron content and
significantly affects the stellar structure and its evolution. For this reason, the interpretation of the already available
and still growing amount of data concerning C-rich metal-poor stars belonging to our Galaxy as well as to dwarf
spheroidal galaxies would require reliable AGB stellar models for low and very low metallicities. In this paper we
address the question of calculation and use of appropriate opacity coefficients, which take into account the C
enhancement caused by the third dredge-up. A possible N enhancement, caused by the cool bottom process or by
the engulfment of protons into the convective zone generated by a thermal pulse and the subsequent huge third
dredge-up, is also considered. Based on up-to-date stellar models, we illustrate the changes induced by the use of
these opacity coefficients on the physical and chemical properties expected for these stars.
14
STAYS IN INTERNATIONALLY RECOGNIZED CENTRES
CENTRE: Centre for Stellar and Planetary Astrophysics School of Mathematical Sciences
PLACE: Melbourne
COUNTRY: Australia YEAR: 2005
LENGHT: 3 months
TOPIC: upgrade of the nuclear network of the Mount Stromlo Stellar Program
CENTRE: Max Planck Institute for Astrophysics
PLACE: Garching
COUNTRY: Germany YEAR: 2010
LENGHT: 1 week
TOPIC: Invited seminar and scientific collaboration
15
PRESENTATIONS IN CONGRESSES AND WORKSHOPS
AUTHORS: Cristallo, S., et al.
TITLE: Gaia Rotation measurements for mixing and nucleosynthesis
TYPE OF PRESENTATION: Oral
CONGRESS: GAIA Italian Meeting
PUBLICATION: not planned
MEETING PLACE: Bologna, Italy
YEAR: 2011
AUTHORS: Cristallo, S., et al.
TITLE: Nucleosynthesis in very low metallicities AGB stars: traces from proton ingestion episodes
TYPE OF PRESENTATION: Oral
CONGRESS: 11th Nuclei in the Cosmos
PUBLICATION: not submitted
MEETING PLACE: Heidelberg, Germany
YEAR: 2010
AUTHORS: Cristallo, S., Piersanti, L., Gallino, R., Straniero, O., Kappeler, F., Dominguez, I., Mohr, P.
TITLE: The long-standing problem of 176Lu/176Hf branching: a new approach with full stellar
evolutionary models
TYPE OF PRESENTATION: Oral
CONGRESS: Nuclear Physics in Astrophysics IV
PUBLICATION: JPCS 202, 2033 (2010) – REFERRED
MEETING PLACE: Roma, Italy
YEAR: 2009
AUTHORS: Cristallo, S., Piersanti, L., Straniero, O., Gallino, R., Domínguez, I., Käppeler, F.
TITLE: Asymptotic-Giant-Branch Models at Very Low Metallicity
TYPE OF PRESENTATION: Oral
CONGRESS: 10th Torino Workshop on AGB Stars
PUBLICATION: PASA, 26, 139 (2009) – REFERRED
MEETING PLACE: Torino, Italy
YEAR: 2008
AUTHORS: Cristallo, S., Straniero, O., Gallino, R., Piersanti, L., Domínguez, I., Lederer, M. T.
TITLE: Why galaxies care about Asymptotic Giant Branch Stars
TYPE OF PRESENTATION: Oral
CONGRESS: 52nd Meeting of the Italian Astronomical Society
PUBLICATION: MemSaIt, 80, 157 (2009) – NOT REFERRED
MEETING PLACE: Teramo, Italy
16
YEAR: 2008
AUTHORS: Cristallo, S., Straniero O., Gallino, R., Piersanti, L., Lederer M.T., Dominguez, I.
TITLE: Progresses in AGB modelling
TYPE OF PRESENTATION: Oral
CONGRESS: 9th Torino Workshop on AGB Stars
PUBLICATION: AIPC, 1001, 3 (2008) – NOT REFERRED
MEETING PLACE: Perugia, Italy
YEAR: 2007
AUTHORS: Cristallo, S., Straniero O., Lederer M.T.
TITLE: Evolution and nucleosynthesis of low-mass metal-poor AGB models with C- and N-enhanced
molecular opacities
TYPE OF PRESENTATION: Oral
CONGRESS: First Stars III
PUBLICATION: AIPC, 990, 320 (2008) – NOT REFERRED
MEETING PLACE: Santa Fe, NM
YEAR: 2007
AUTHORS: Cristallo, S., Straniero O., Gallino, R.
TITLE: Constraints on AGB Models from s-Process Nucleosynthesis
TYPE OF PRESENTATION: Poster
CONGRESS: Why Galaxies Care about AGB stars
PUBLICATION: ASPC, 378, 119 (2007) – NOT REFERRED
MEETING PLACE: Vienna, Austria
YEAR: 2006
AUTHORS: Cristallo, S.
TITLE: Evolution and nucleosynthesis in low mass Asymptotic Giant Branch stars (AWARDED AS THE
BEST COMMUNICATION IN THE SECTION “ASTYRONOMY & ASTROPHYSICS”)
TYPE OF PRESENTATION: Oral
CONGRESS: 55th Annual Meeting of the Italian Physics Society
PUBLICATION: Nuovo Cimento B, 122, 697 (2007) - REFERRED
MEETING PLACE: Pisa, italy
YEAR: 2007
AUTHORS: Cristallo, S., Straniero O., Gallino, R., Piersanti, L., Lederer M.T., Dominguez, I.
TITLE: Short-lived isotopes and 23Na production in low mass AGB Stars
TYPE OF PRESENTATION: Oral
CONGRESS: 8th Torino Workshop on AGB Stars
PUBLICATION: Mem. S.A.It., 77, 774 (2006) – NOT REFERRED
MEETING PLACE: Granada, Spain
YEAR: 2006
17
AUTHORS: Cristallo, S., Straniero O., Gallino, R., Piersanti, L., Dominguez, I.
TITLE: Light and heavy elements nucleosynthesis in low mass AGB Stars
TYPE OF PRESENTATION: Oral
CONGRESS: 9th Nuclei in the Cosmos
PUBLICATION: Proceedings of Science, 62 (2006) – REFERRED
MEETING PLACE: Ginevra (CERN), Swiss
YEAR: 2006
AUTHORS: Cristallo, S., Straniero O., Gallino, R.
TITLE: Constraints on AGB Models from s-Process Nucleosynthesis
TYPE OF PRESENTATION: Poster
CONGRESS: Why galaxies care about AGB stars
PUBLICATION: ASP Conference Series, 378, 119 (2007)– NOT REFERRED
MEETING PLACE: Vienna, Austria
YEAR: 2006
AUTHORS: Cristallo, S., Straniero, O., Gallino, R., Piersanti, L., Dominguez, I.
TITLE: : Synthesis of light elements in Asymptotic Giant Branch stars
TYPE OF PRESENTATION: Oral
CONGRESS: Fifth Italian Nuclear Astrophisics Meeting (GIANTS)
PUBLICATION: no planned publication
MEETING PLACE: Teramo, Italy
YEAR: 2005
AUTHORS: Cristallo, S., Straniero, O., Gallino, R., Piersanti, L., Dominguez, I.
TITLE: : Chemical pollution from AGB Stars
TYPE OF PRESENTATION: Poster
CONGRESS: From lithium to uranium: Elemental Traces of Early Cosmic Evolution (IAUS 228)
PUBLICATION: IAUS, 228, 483 (2005) – NOT REFERRED
MEETING PLACE: Paris, France
YEAR: 2005
AUTHORS: Cristallo, S., Straniero O., Gallino, R.
TITLE: : Specific problems of neutron capture nucleosynthesis in AGB stars
TYPE OF PRESENTATION: Oral
CONGRESS: CYCIT-INFN collaboration workshop
PUBLICATION: no planned publication
MEETING PLACE: Granada, Spain
YEAR: 2004
AUTHORS: Cristallo, S., Straniero O., Gallino, R.
18
TITLE: : A full network coupled to the evolutionary code: detailed s-process nucleosynthesis in low mass
AGB Stars
TYPE OF PRESENTATION: Oral
CONGRESS: 7th Torino Workshop on AGB Stars
PUBLICATION: Mem. S.A.It., 75, 676 (2004) – NOT REFERRED
MEETING PLACE: Cambridge, UK
YEAR: 2004
AUTHORS: Cristallo, S., Straniero O., Gallino, R.
TITLE: S-process nucleosynthesis in low mass AGB stars: do we really need an improved determination
of the 13C(α,n)16O reaction?
TYPE OF PRESENTATION: Poster
CONGRESS: 8th Nuclei in the Cosmos
PUBLICATION: Nucl. Phys. A, 758, 509 (2005) – REFERRED
MEETING PLACE: Vancouver, Canada
YEAR: 2004
AUTHORS: Cristallo, S., Gallino, R., Straniero, O.
TITLE: Self-consistent 13C pocket in low mass AGB stars and related nucleosynthesis
TYPE OF PRESENTATION: Oral
CONGRESS: Stars in Galaxies, IV National Workshop on Stellar Astrophysics and Joint International
Meeting on New Perspectives for Observational Astronomy at the Canary Islands
PUBLICATION: Mem. S.A.It., 75, 174 (2004)– NOT REFERRED
MEETING PLACE: Santa Cruz de La Palma, Canary Islands (Spain)
YEAR: 2003
19
OTHER ACHIEVEMENTS
(in one DIN A4 page only)
Awarded for the best oral communication in the “Astronomy and Astrophysics “ Session of the “XCIII
National Meeting of the Italian Physics Society", held in Pisa (Italy) in Semptember 2007.
Co-titular of the Master Degree Course in “Galactic chemical evolution” at the Faculty of Science of
Granada Univesity (2009-2010; 2010-2011; 2011-2012).
Assistant in the Physics I course for the Degree in Geology at the Faculty of Science of Granada
Univesity (2010-2011).
Invited seminar at Max Planck Institute for Astrophysics (Garching, Germany) with the title: “s-process
distributions from full evolutionary AGB models” (February 2010).
Invited seminar University of Perugia with the title: “Evolution, nucleosynthesis and yields of low mass
AGB stars at different metallicities:: the FRUITY database.” (July 2011).
Editor of the Proceeding of “The 52th Italian Astronomical Society” meeting held in Teramo (Italy) in May
2008.
Member of the Local Organizing Committee of "The Origin of the Elements Heavier than Fe" meeting,
held in Turin (Italy) in September of 2008.
Member of the Local Organizing Committee of “The 52th Italian Astronomical Society” meeting, held in
Teramo (Italy) in May 2008.
Member of the Local Organizing Committee of “The fifth Italian Nuclear Astrophisics” meeting, held in
Teramo (Italy) in April 2005.
20