S-process nucleosynthesis in AGB models with the FST prescription for convection

A. Yagüe, D. A. García-Hernández, Paolo Ventura, M. Lugaro

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

The chemical evolution of asymptotic giant branch (AGB) stars depends greatly on the input physics (e.g., mass loss recipe, convective model). Variations in the hot bottom burning (HBB) strength, third dredge-up (TDU) efficiency and AGB evolutionary timescale are among the main consequences of adopting difierent input physics. The ATON evolutionary code stands apart from others in that it uses the Blocker mass loss prescription and the Full Spectrum of Turbulence (FST) convective model. We have developed an s-process module for ATON by extending the element network from 30 to 320 elements, which uses the physical inputs (such as temperature or density) calculated by ATON. Here we present the first preliminary results of s-process nucleosynthesis for ATON AGB models with different progenitor masses. These preliminary results are compared with predictions from other AGB nucleosynthesis models that use different input physics. We also outline our future tasks to improve the current s-process ATON simulations.

Original languageEnglish
Title of host publicationMemorie della Societa Astronomica Italiana
Subtitle of host publicationJournal of the Italian Astronomical Society
EditorsP Ventura, D A Garcıa–Hernandez, M Groenewegen, J Th van Loon
Place of PublicationFlorence Italy
PublisherItalian Astronomical Society (SAIt)
Pages237-242
Number of pages6
Volume87
Publication statusPublished - 2016
EventEuropean Week of Astronomy and Space Science 2015: AGB stars: a key ingredient in the understanding and interpretation of stellar populations - Universidad de La Laguna, La Laguna, Spain
Duration: 22 Jun 201526 Jun 2015
http://eas.unige.ch/EWASS2015/index.jsp

Publication series

NameMemorie della Societa Astronomica Italiana: Journal of the Italian Astronomical Society
PublisherSocieta Astronomica Italiana
Number2
Volume87
ISSN (Print)0037-8720
ISSN (Electronic)1824-016X

Conference

ConferenceEuropean Week of Astronomy and Space Science 2015
Abbreviated titleEWASS 2015
CountrySpain
CityLa Laguna
Period22/06/1526/06/15
Internet address

Keywords

  • Abundances
  • Nuclear reactions
  • Nucleosynthesis
  • Stars: Abundances
  • Stars: AGB and post-AGB
  • Stars: evolution
  • Stars: interiors

Cite this

Yagüe, A., García-Hernández, D. A., Ventura, P., & Lugaro, M. (2016). S-process nucleosynthesis in AGB models with the FST prescription for convection. In P. Ventura, D. A. Garcıa–Hernandez, M. Groenewegen, & J. T. van Loon (Eds.), Memorie della Societa Astronomica Italiana: Journal of the Italian Astronomical Society (Vol. 87, pp. 237-242). (Memorie della Societa Astronomica Italiana: Journal of the Italian Astronomical Society; Vol. 87, No. 2). Italian Astronomical Society (SAIt). http://sait.oat.ts.astro.it/MSAIt870216/PDF/2016MmSAI..87..237Y.pdf