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dc.contributor.authorChung, H.
dc.contributor.authorVargas, C.J.
dc.contributor.authorHamden, E.
dc.date.accessioned2021-09-09T21:27:43Z
dc.date.available2021-09-09T21:27:43Z
dc.date.issued2021
dc.identifier.citationChung, H., Vargas, C. J., & Hamden, E. (2021). Revisiting FUSE O vi Emission in Galaxy Halos. Astrophysical Journal, 916(1).
dc.identifier.issn0004-637X
dc.identifier.doi10.3847/1538-4357/ac04af
dc.identifier.urihttp://hdl.handle.net/10150/661446
dc.description.abstractA significant fraction of baryons in galaxies are in the form of diffuse gas of the circumgalactic medium (CGM). One critical component of the multiphases of CGM, the so-called "coronal"warm-hot phase gas (105-106 K) traced by O vi 1031.93, 1037.62 Å resonance lines, has rarely been detected in emission from galaxy halos other than that of the Milky Way. Here we report four additional detections of O vi emission gas in the halos of nearby edge-on galaxies, NGC 4631 and NGC 891, using archival Far Ultraviolet Spectroscopic Explorer data and an updated data pipeline. We find the most intense O vi emission to be from fields forming a vertical line near the center of NGC 4631, despite the close proximity to the disk of two other fields. The detected O vi emission surface brightness is about (1.1 ± 0.3) × 10-18 to (3.9 ± 0.8) × 10-18 erg s-1 cm-2 arcsec-2. The spatial distribution of the five 30″ × 30″ O vi detection fields in NGC 4631 can be interpreted as the existence of filamentary structures of more intense O vi emission superimposed within a diffuse and faint O vi halo in star-forming galaxies. Volume-filled O vi emission mapping is greatly needed to determine the structure and prevalence of warm-hot gas and the role it plays in the cycling of gas between the galaxy disk and the halo. Finally, we present the sensitivity of future funded and proposed UV missions (LUVOIR-A, LUVOIR-B, CETUS, and Aspera) to the detection of diffuse and faint O vi emission in nearby galaxy halos. © 2021. The American Astronomical Society. All rights reserved..
dc.language.isoen
dc.publisherIOP Publishing Ltd
dc.rightsCopyright © 2021. The American Astronomical Society. All rights reserved.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleRevisiting FUSE O vi Emission in Galaxy Halos
dc.typeArticle
dc.typetext
dc.contributor.departmentUniversity of Arizona, Steward Observatory
dc.identifier.journalAstrophysical Journal
dc.description.noteImmediate access
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleAstrophysical Journal
refterms.dateFOA2021-09-09T21:27:43Z


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