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Massive Stars in Low-metallicity Galaxies in the CLASSY Survey

Published online by Cambridge University Press:  29 August 2024

Danielle A. Berg Open the ORCID record for Danielle A. Berg [Opens in a new window] ,
Beth L. James ,
Teagan King ,
Meaghan McDonald ,
Zuyi Chen ,
John Chisholm ,
Timothy Heckman ,
Crystal L. Martin ,
Dan P. Stark  and
The CLASSY Team
Danielle A. Berg*
Affiliation:
Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA
Beth L. James
Affiliation:
AURA for ESA, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Teagan King
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Meaghan McDonald
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Zuyi Chen
Affiliation:
Steward Observatory, The University of Arizona, 933 N Cherry Ave, Tucson, AZ, 85721, USA
John Chisholm
Affiliation:
Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA
Timothy Heckman
Affiliation:
Center for Astrophysical Sciences, Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Crystal L. Martin
Affiliation:
Department of Physics, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
Dan P. Stark
Affiliation:
Steward Observatory, The University of Arizona, 933 N Cherry Ave, Tucson, AZ, 85721, USA
The CLASSY Team
Affiliation:
39 collaborators worldwide
*
email: daberg@austin.utexas.edu
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Abstract

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Rest-frame far-ultraviolet spectra are fundamental to our understanding of star-forming galaxies, providing a unique window on massive star populations (MSs), chemical evolution, feedback processes, and reionization. JWST is ushering in a new era, pushing the FUV frontier beyond z=10. The success of such endeavors hinges on a comprehensive understanding of the MSs and gas conditions that power the observed spectra. The COS Legacy Archive Spectroscopic SurveY (CLASSY) is a powerful and promising solution providing high-quality, high-resolution FUV spectra of 45 nearby star-forming galaxies. The spectra contain a suite of features that simultaneously characterize the MSs that populate metal-poor galaxies, physical properties of large-scale outflows, and chemical abundance patterns. The CLASSY sample is consistent with the z 0 mass-metallicity relationship and spans 1.5 dex in metallicity. These unique properties make CLASSY the benchmark training set for studies of MSs in star-forming galaxies both across cosmic time and connecting metal-poor to metal-rich populations.

Keywords

atlasesgalaxies: star clustersstars: windsoutflowsstars: mass loss
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 26 - 35
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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