The Cosmic Ultraviolet Baryon Survey (CUBS). VII. On the Warm-hot Circumgalactic Medium Probed by O vi and Ne viii at 0.4 ≲ z ≲ 0.7

Zhijie Qu; Hsiao-Wen Chen; Sean D. Johnson; Gwen C. Rudie; Fakhri S. Zahedy; David DePalma; Joop Schaye; Erin T. Boettcher; Sebastiano Cantalupo; Mandy C. Chen; Claude-André Faucher-Giguère; Jennifer I-Hsiu Li; John S. Mulchaey; Patrick Petitjean; Marc Rafelski

doi:10.3847/1538-4357/ad410b

The Astrophysical Journal (Jan 2024)

The Cosmic Ultraviolet Baryon Survey (CUBS). VII. On the Warm-hot Circumgalactic Medium Probed by O vi and Ne viii at 0.4 ≲ z ≲ 0.7

Zhijie Qu,
Hsiao-Wen Chen,
Sean D. Johnson,
Gwen C. Rudie,
Fakhri S. Zahedy,
David DePalma,
Joop Schaye,
Erin T. Boettcher,
Sebastiano Cantalupo,
Mandy C. Chen,
Claude-André Faucher-Giguère,
Jennifer I-Hsiu Li,
John S. Mulchaey,
Patrick Petitjean,
Marc Rafelski

Affiliations

Zhijie Qu: ORCiD; Department of Astronomy & Astrophysics, The University of Chicago , 5640 S. Ellis Avenue, Chicago, IL 60637, USA ; [email protected]
Hsiao-Wen Chen: ORCiD; Department of Astronomy & Astrophysics, The University of Chicago , 5640 S. Ellis Avenue, Chicago, IL 60637, USA ; [email protected]
Sean D. Johnson: ORCiD; Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA
Gwen C. Rudie: ORCiD; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
Fakhri S. Zahedy: ORCiD; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
David DePalma: Department of Physics, MIT , 77 Massachusetts Avenue, Cambridge, MA 02139, USA; MIT-Kavli Institute for Astrophysics and Space Research , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Joop Schaye: ORCiD; Leiden Observatory, Leiden University , PO Box 9513, NL-2300 RA Leiden, The Netherlands
Erin T. Boettcher: ORCiD; Department of Astronomy, University of Maryland , College Park, MD 20742, USA; X-ray Astrophysics Laboratory, NASA/GSFC , Greenbelt, MD 20771, USA; Center for Research and Exploration in Space Science and Technology, NASA/GSFC , Greenbelt, MD 20771, USA
Sebastiano Cantalupo: ORCiD; Department of Physics, University of Milan Bicocca , Piazza della Scienza 3, I-20126 Milano, Italy
Mandy C. Chen: Department of Astronomy & Astrophysics, The University of Chicago , 5640 S. Ellis Avenue, Chicago, IL 60637, USA ; [email protected]
Claude-André Faucher-Giguère: Department of Physics & Astronomy, Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University , 1800 Sherman Avenue, Evanston, IL 60201, USA
Jennifer I-Hsiu Li: ORCiD; Department of Astronomy, University of Michigan , Ann Arbor, MI 48109, USA; Michigan Institute for Data Science, University of Michigan , Ann Arbor, MI 48109, USA
John S. Mulchaey: ORCiD; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
Patrick Petitjean: Institut d’Astrophysique de Paris , CNRS-SU, UMR 7095, 98bis bd Arago, Paris F-75014, France
Marc Rafelski: ORCiD; Space Telescope Science Institute , Baltimore, MD 21218, USA; Department of Physics & Astronomy, Johns Hopkins University , Baltimore, MD 21218, USA

DOI: https://doi.org/10.3847/1538-4357/ad410b
Journal volume & issue: Vol. 968, no. 1
p. 8

Abstract

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This paper presents a newly established sample of 103 unique galaxies or galaxy groups at 0.4 ≲ z ≲ 0.7 from the Cosmic Ultraviolet Baryon Survey (CUBS) for studying the warm-hot circumgalactic medium (CGM) probed by both O vi and Ne viii absorption. The galaxies and associated neighbors are identified at 40 km s ^−1 for galaxies of $\mathrm{log}{M}_{\mathrm{star}}/{M}_{\odot }\gt 9$ within the virial radius, suggesting a more dynamic warm-hot halo around these galaxies. Finally, the warm-hot CGM probed by O vi and Ne viii is suggested to be the dominant phase in sub- L * galaxies with $\mathrm{log}{M}_{\mathrm{star}}/{M}_{\odot }\approx 9\mbox{--}10$ based on their high ionization fractions in the CGM.

Published in The Astrophysical Journal

ISSN: 1538-4357 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy: Astrophysics
Website: https://iopscience.iop.org/journal/0004-637X

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