SERGIO CRISTALLO CURRICULUM VITAE

Transcription

1 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, TERAMO Country: ITALY Administrative status: Permanent Staff Telephone: CRISTALLO@OA-TERAMO.INAF.IT Activities: Theoretical Research in Computational Stellar Physics; Responsible for didactic and scientific divulgation at Osservatorio Astronomico di Teramo. Field of study (UNESCO codes): 21, , , 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 13 C-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 ( 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 12 C/ 13 C, a significant synthesis 1

2 of primary 14 N and of 7 Li. 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 ( 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. Centre Thesis Supervisor Date COMPUTATIONAL UNIVERSITA DI TERAMO Prof. O. STRANIERO ASTROPHYSICS OSS. ASTRON. TERAMO PAST NON SCIENTIFIC EXPERIENCE Position Industry Start date End date TECHNICIAN Marconi Communications 01/ /2002 PAST SCIENTIFIC EXPERIENCE Position R&D Centre Institution Start date End date FORWARD CONTRACT UNIV. STUDI TORINO DIPARTIM. FISICA 09/ /2000 FORWARD CONTRACT UNIV. STUDI TORINO DIPARTIM. FISICA 12/ /2003 POST-DOC POSITION OSS. ASTR. TERAMO INAF- TERAMO 06/ /2009 Juan de la Cierva (Post-doc) UNIV. GRANADA DEP. FIS. TEORICA 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

3 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: 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: 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: 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: FPA 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: AYA C02-02/AYA) FINANCIAL ENTITY: euro 3

4 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 (AYA ) FINANCIAL ENTITY: euro LENGHT FROM: 2012 TO: 2014 PRINCIPAL INVESTIGATOR: Dominguez I. (Univ. Granada) 4

5 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) 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) 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) 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) 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) 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

6 JOURNAL/BOOK TITLE: ASP Conf. Series, 445, 143 (NOT REFERRED) 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) 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) 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) 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) 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) AUTHORS (in order of authorship): Gallino, R., Bisterzo, S., Cristallo, S., Straniero, O. TITLE: The Role of Primary 16 O 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

7 TITLE: Is the problem of 19 F 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, (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 (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 (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) AUTHORS (in order of authorship): Davis, A. M., Gallino, R., Cristallo, S., Straniero, O. 7

8 TITLE: Asymptotic Giant Branch Stars and Their Influence on the Isotopic Compositions of the Transition Elements JOURNAL/BOOK TITLE: M&PSA, 72, 5402D. (REFERRED) 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) 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) 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) 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) 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) 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) 8

9 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) 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) 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) 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 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 (*):

10 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, (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, (REFERRED) DATE OF PUBLICATION (*):

11 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: 22 Ne 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, (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

12 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, (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 <= 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 13 C pocket in Asymptotic Giant Branch stars and related nucleosynthesis JOURNAL/BOOK TITLE: Nucl. Phys. A, 688, 217. (REFERRED) DATE OF PUBLICATION (*):

13 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) 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 <= Z <= , 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) 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 = (the solar one) and Z = , 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 13 C pocket, which forms in the core-envelope transition region after each TDU episode. The formation of this 13 C 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 13 C(α, n) 16 O reaction during the interpulse phase in radiative conditions, when temperatures within the pockets attain T ~ K, with typical densities of ( ) neutrons cm -3. Exceptions are found, as in the case of the first pocket of the metal-rich models (Z = , Z = and Z = 0.003), where the 13 C 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 ~ K, thus producing larger neutron densities (up to neutrons cm -3 ). An additional neutron exposure, caused by the 22 Ne(α, n) 25 Mg during the TPs, is marginally activated at large Z, but becomes an important nucleosynthesis source at low Z, when most of the 22 Ne 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 = ) 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

14 model, we found an interesting overproduction of some radioactive isotopes, like 60 Fe, as a consequence of the anomalous first 13 C 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

15 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

16 PRESENTATIONS IN CONGRESSES AND WORKSHOPS AUTHORS: Cristallo, S., et al. TITLE: Gaia Rotation measurements for mixing and nucleosynthesis 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 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 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 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 CONGRESS: 52 nd Meeting of the Italian Astronomical Society PUBLICATION: MemSaIt, 80, 157 (2009) NOT REFERRED MEETING PLACE: Teramo, Italy 16

17 YEAR: 2008 AUTHORS: Cristallo, S., Straniero O., Gallino, R., Piersanti, L., Lederer M.T., Dominguez, I. TITLE: Progresses in AGB modelling 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 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 ) 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 23 Na production in low mass AGB Stars CONGRESS: 8th Torino Workshop on AGB Stars PUBLICATION: Mem. S.A.It., 77, 774 (2006) NOT REFERRED MEETING PLACE: Granada, Spain YEAR:

18 AUTHORS: Cristallo, S., Straniero O., Gallino, R., Piersanti, L., Dominguez, I. TITLE: Light and heavy elements nucleosynthesis in low mass AGB Stars 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 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 CONGRESS: CYCIT-INFN collaboration workshop PUBLICATION: no planned publication MEETING PLACE: Granada, Spain YEAR: 2004 AUTHORS: Cristallo, S., Straniero O., Gallino, R. 18

19 TITLE: : A full network coupled to the evolutionary code: detailed s-process nucleosynthesis in low mass AGB Stars 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 13 C(α,n) 16 O 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 13 C pocket in low mass AGB stars and related nucleosynthesis 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:

20 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 Co-titular of the Master Degree Course in Galactic chemical evolution at the Faculty of Science of Granada Univesity ( ; ; ). Assistant in the Physics I course for the Degree in Geology at the Faculty of Science of Granada Univesity ( ). 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 52 th Italian Astronomical Society meeting held in Teramo (Italy) in May Member of the Local Organizing Committee of "The Origin of the Elements Heavier than Fe" meeting, held in Turin (Italy) in September of Member of the Local Organizing Committee of The 52 th Italian Astronomical Society meeting, held in Teramo (Italy) in May Member of the Local Organizing Committee of The fifth Italian Nuclear Astrophisics meeting, held in Teramo (Italy) in April