The Supersonic Project: To Cool or Not to Cool Supersonically Induced Gas Objects (SIGOs)?
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Chiou_2021_ApJ_906_25.pdf
Description
Published version
Size
5.1 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Chiou, Yeou S
Naoz, Smadar
Burkhart, Blakesley
Marinacci, Federico
Vogelsberger, Mark
Date Issued
2021
Journal
Astrophysical Journal
Publisher
American Astronomical Society
Citation
Chiou, Yeou S, Naoz, Smadar, Burkhart, Blakesley, Marinacci, Federico and Vogelsberger, Mark. 2021. "The Supersonic Project: To Cool or Not to Cool Supersonically Induced Gas Objects (SIGOs)?." Astrophysical Journal, 906 (1).
Version
Final published version
Abstract
© 2021. The American Astronomical Society. Supersonically induced gas objects (SIGOs) primarily form in the early universe, outside of dark matter halos due to the presence of a relative stream velocity between baryons and dark matter. These structures may be the progenitors of globular clusters. Since SIGOs are made out of pristine gas, we investigate the effect of atomic cooling on their properties. We run a suite of simulations by using the moving-mesh code AREPO, with and without baryon dark matter relative velocity and with and without the effects of atomic cooling. We show that SIGO's density, temperature, and prolateness are determined by gravitational interactions rather than cooling. The cold gas fraction in SIGOs is much higher than that of dark matter halos. Specifically, we show that SIGO's characteristically low temperature and extremely high gas density forges a nurturing ground for the earliest star formation sites.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3847/1538-4357/ABC88F
