Global Distribution of Far-ultraviolet Emissions from Highly Ionized Gas in the Milky Way

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dc.contributor.authorJo, Young-Sooko
dc.contributor.authorSeon, Kwang-ilko
dc.contributor.authorMin, Kyoung-Wookko
dc.contributor.authorEdelstein, Jerryko
dc.contributor.authorWonyoung, Hanko
dc.contributor.authorKorpela, Eric J.ko
dc.contributor.authorSirk, Martin M.ko
dc.date.accessioned2019-07-23T06:20:32Z-
dc.date.available2019-07-23T06:20:32Z-
dc.date.created2019-07-23-
dc.date.created2019-07-23-
dc.date.created2019-07-23-
dc.date.issued2019-07-
dc.identifier.citationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, v.243, no.1, pp.9-
dc.identifier.issn0067-0049-
dc.identifier.urihttp://hdl.handle.net/10203/263736-
dc.description.abstractWe present all-sky maps of two major far-ultraviolet cooling lines, C IV and O VI, of highly ionized gas to investigate the nature of the transition-temperature gas. From the extinction-corrected line intensities of C IV and O VI, we calculated the gas temperature and the emission measure of the transition-temperature gas assuming isothermal plasma in the collisional ionization equilibrium. The gas temperature was found to be more or less uniform throughout the Galaxy with a value of (1.89 +/- 0.06) x 10(5) K. The emission measure of the transition-temperature gas is described well by a disk-like model in which the scale height of the electron density is z(0) = 6(-2)(+3) kpc. The total mass of the transition-temperature gas is estimated to be approximately 6.4(-2.8)(+5.2) x 10(9)M(circle dot). We also calculated the volume-filling fraction of the transition-temperature gas, which was estimated to be f = 0.26 +/- 0.09, and it varies from f similar to 0.37 in the inner Galaxy to f similar to 0.18 in the outer Galaxy. The spatial distribution of C IV and O VI cannot be explained by a simple supernova remnant model or a three-phase model. The combined effects of supernova remnants and turbulent mixing layers can explain the intensity ratio of C IV and O VI. Thermal conduction front models and high-velocity cloud models are also consistent with our observation.-
dc.languageEnglish-
dc.publisherIOP PUBLISHING LTD-
dc.titleGlobal Distribution of Far-ultraviolet Emissions from Highly Ionized Gas in the Milky Way-
dc.typeArticle-
dc.identifier.wosid000473818500002-
dc.type.rimsART-
dc.citation.volume243-
dc.citation.issue1-
dc.citation.beginningpage9-
dc.citation.publicationnameASTROPHYSICAL JOURNAL SUPPLEMENT SERIES-
dc.identifier.doi10.3847/1538-4365/ab22ae-
dc.contributor.localauthorMin, Kyoung-Wook-
dc.contributor.nonIdAuthorJo, Young-Soo-
dc.contributor.nonIdAuthorSeon, Kwang-il-
dc.contributor.nonIdAuthorEdelstein, Jerry-
dc.contributor.nonIdAuthorWonyoung, Han-
dc.contributor.nonIdAuthorKorpela, Eric J.-
dc.contributor.nonIdAuthorSirk, Martin M.-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthordust, extinction-
dc.subject.keywordAuthorGalaxy: evolution-
dc.subject.keywordAuthorGalaxy: halo-
dc.subject.keywordAuthorISM: structure-
dc.subject.keywordAuthorline: formation-
dc.subject.keywordAuthorultraviolet: ISM-
dc.subject.keywordPlusLARGE-MAGELLANIC-CLOUD-
dc.subject.keywordPlusX-RAY-
dc.subject.keywordPlusINTERSTELLAR-MEDIUM-
dc.subject.keywordPlusSUPERNOVA-REMNANTS-
dc.subject.keywordPlusO-VI-
dc.subject.keywordPlusABSORPTION-
dc.subject.keywordPlusHALO-
dc.subject.keywordPlusEXTINCTION-
dc.subject.keywordPlusEVOLUTION-
dc.subject.keywordPlusIMPACT-
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