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SLUG: Stochastically Lighting Up Galaxies. I. Methods and Validating Tests

da Silva, R.L.; Fumagalli, M.; Krumholz, M.

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Authors

R.L. da Silva

M. Krumholz



Abstract

The effects of stochasticity on the luminosities of stellar populations are an often neglected but crucial element for understanding populations in the low-mass or the low star formation rate regime. To address this issue, we present SLUG, a new code to "Stochastically Light Up Galaxies." SLUG synthesizes stellar populations using a Monte Carlo technique that properly treats stochastic sampling including the effects of clustering, the stellar initial mass function, star formation history, stellar evolution, and cluster disruption. This code produces many useful outputs, including (1) catalogs of star clusters and their properties such as their stellar initial mass distributions and their photometric properties in a variety of filters, (2) two dimensional histograms of color-magnitude diagrams of every star in the simulation, and (3) the photometric properties of field stars and the integrated photometry of the entire simulated galaxy. After presenting the SLUG algorithm in detail, we validate the code through comparisons with STARBURST99 in the well-sampled regime, and with observed photometry of Milky Way clusters. Finally, we demonstrate SLUG's capabilities by presenting outputs in the stochastic regime. SLUG is publicly distributed through the Web site http://sites.google.com/site/runslug/.

Citation

da Silva, R., Fumagalli, M., & Krumholz, M. (2012). SLUG: Stochastically Lighting Up Galaxies. I. Methods and Validating Tests. Astrophysical Journal, 745(2), Article 145. https://doi.org/10.1088/0004-637x/745/2/145

Journal Article Type Article
Publication Date Feb 1, 2012
Deposit Date Apr 6, 2014
Publicly Available Date Mar 29, 2024
Journal Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 745
Issue 2
Article Number 145
DOI https://doi.org/10.1088/0004-637x/745/2/145
Keywords Galaxies: star clusters: general, Galaxies: stellar content, Methods: numerical, Methods: statistical, Stars: formation, Techniques: photometric.

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Copyright Statement
© 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A.





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