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Title: SYGMA: Stellar Yields for Galactic Modeling Applications

Abstract

The Stellar Yields for Galactic Modeling Applications (SYGMA) code is an open-source module that models the chemical ejecta and feedback of simple stellar populations (SSPs). It is intended for use in hydrodynamical simulations and semi-analytic models of galactic chemical evolution. The module includes the enrichment from asymptotic giant branch (AGB) stars, massive stars, Type Ia supernovae (SNe Ia), and compact binary mergers. An extensive and extendable stellar yields library includes the NuGrid yields with all elements and many isotopes up to Bi. Stellar feedback from mechanic and frequency-dependent radiative luminosities are computed based on NuGrid stellar models and their synthetic spectra. The module further allows for customizable initial mass functions and SN Ia delay-time distributions to calculate time-dependent ejecta based on stellar yield input. A variety of r-process sites can be included. A comparison of SSP ejecta based on NuGrid yields with those from Portinari et al. and Marigo reveals up to factors of 3.5 and 4.8 less C and N enrichment from AGB stars at low metallicity, a result we attribute to NuGrid's modeling of hot-bottom burning. Different core-collapse supernova explosions and fallback prescriptions may lead to substantial variations for the accumulated ejecta of C, O and Si inmore » the first 107 years at Z = 0.001. Finally, an online interface of the open-source SYGMA module enables interactive simulations, analysis, and data extraction of the evolution of all species formed by the evolution of simple stellar populations.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [5]
  1. Univ. of Victoria, BC (Canada). Dept. of Physics and Astronomy; Keele Univ. (United Kingdom); Michigan State Univ., East Lansing, MI (United States)
  2. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab; Hungarian Academy of Sciences, Budapest (Hungary). Konkoly Observatory, Research Centre for Astronomy and Earth Sciences
  3. Univ. of Victoria, BC (Canada). Dept. of Physics and Astronomy; Michigan State Univ., East Lansing, MI (United States)
  4. Univ. of Victoria, BC (Canada). Dept. of Physics and Astronomy
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
NuGrid collaboration
OSTI Identifier:
1481132
Report Number(s):
LA-UR-17-30607
Journal ID: ISSN 1538-4365
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal. Supplement Series (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal. Supplement Series (Online); Journal Volume: 237; Journal Issue: 2; Journal ID: ISSN 1538-4365
Publisher:
American Astronomical Society/IOP
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Galaxy: evolution; nuclear reactions, nucleosynthesis, abundances; stars: abundances

Citation Formats

Ritter, Christian, Côté, Benoit, Herwig, Falk, Navarro, Julio F., and Fryer, Chris L. SYGMA: Stellar Yields for Galactic Modeling Applications. United States: N. p., 2018. Web. doi:10.3847/1538-4365/aad691.
Ritter, Christian, Côté, Benoit, Herwig, Falk, Navarro, Julio F., & Fryer, Chris L. SYGMA: Stellar Yields for Galactic Modeling Applications. United States. doi:10.3847/1538-4365/aad691.
Ritter, Christian, Côté, Benoit, Herwig, Falk, Navarro, Julio F., and Fryer, Chris L. Thu . "SYGMA: Stellar Yields for Galactic Modeling Applications". United States. doi:10.3847/1538-4365/aad691. https://www.osti.gov/servlets/purl/1481132.
@article{osti_1481132,
title = {SYGMA: Stellar Yields for Galactic Modeling Applications},
author = {Ritter, Christian and Côté, Benoit and Herwig, Falk and Navarro, Julio F. and Fryer, Chris L.},
abstractNote = {The Stellar Yields for Galactic Modeling Applications (SYGMA) code is an open-source module that models the chemical ejecta and feedback of simple stellar populations (SSPs). It is intended for use in hydrodynamical simulations and semi-analytic models of galactic chemical evolution. The module includes the enrichment from asymptotic giant branch (AGB) stars, massive stars, Type Ia supernovae (SNe Ia), and compact binary mergers. An extensive and extendable stellar yields library includes the NuGrid yields with all elements and many isotopes up to Bi. Stellar feedback from mechanic and frequency-dependent radiative luminosities are computed based on NuGrid stellar models and their synthetic spectra. The module further allows for customizable initial mass functions and SN Ia delay-time distributions to calculate time-dependent ejecta based on stellar yield input. A variety of r-process sites can be included. A comparison of SSP ejecta based on NuGrid yields with those from Portinari et al. and Marigo reveals up to factors of 3.5 and 4.8 less C and N enrichment from AGB stars at low metallicity, a result we attribute to NuGrid's modeling of hot-bottom burning. Different core-collapse supernova explosions and fallback prescriptions may lead to substantial variations for the accumulated ejecta of C, O and Si in the first 107 years at Z = 0.001. Finally, an online interface of the open-source SYGMA module enables interactive simulations, analysis, and data extraction of the evolution of all species formed by the evolution of simple stellar populations.},
doi = {10.3847/1538-4365/aad691},
journal = {The Astrophysical Journal. Supplement Series (Online)},
number = 2,
volume = 237,
place = {United States},
year = {2018},
month = {8}
}

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Cited by: 8 works
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