Connor Hause, Edward M Sion, Patrick Godon, T Gänsicke Boris, Paula Szkody, Domitilla de Martino, Anna Pala
{"title":"矮新星CW Mon的哈勃COS光谱:静止的白矮星?","authors":"Connor Hause, Edward M Sion, Patrick Godon, T Gänsicke Boris, Paula Szkody, Domitilla de Martino, Anna Pala","doi":"10.3847/1538-3881/aa774c","DOIUrl":null,"url":null,"abstract":"<p><p>We present a synthetic spectral analysis of the HST COS spectrum of the U Geminorum-type dwarf nova CW Mon, taken during quiescence as part of our COS survey of accreting white dwarfs in Cataclysmic Variables. We use synthetic photosphere and optically thick accretion disk spectra to model the COS spectrum as well as archival IUE spectra obtained decades ago when the system was in an even deeper quiescent state. Assuming a reddening of E(B-V)=0.06, an inclination of 60° (CW Mon has eclipses of the accretion disk, and a white dwarf mass of 0.8<i>M</i><sub>⊙</sub>, our results indicate the presence of a 22-27,000 K white dwarf and a low mass accretion rate [Formula: see text], for a derived distance o ~200 to ~300 pc.</p>","PeriodicalId":55582,"journal":{"name":"Astronomical Journal","volume":"154 2","pages":""},"PeriodicalIF":5.1000,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3847/1538-3881/aa774c","citationCount":"1","resultStr":"{\"title\":\"Hubble COS Spectroscopy of the Dwarf Nova CW Mon: The White Dwarf in Quiescence?\",\"authors\":\"Connor Hause, Edward M Sion, Patrick Godon, T Gänsicke Boris, Paula Szkody, Domitilla de Martino, Anna Pala\",\"doi\":\"10.3847/1538-3881/aa774c\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>We present a synthetic spectral analysis of the HST COS spectrum of the U Geminorum-type dwarf nova CW Mon, taken during quiescence as part of our COS survey of accreting white dwarfs in Cataclysmic Variables. We use synthetic photosphere and optically thick accretion disk spectra to model the COS spectrum as well as archival IUE spectra obtained decades ago when the system was in an even deeper quiescent state. Assuming a reddening of E(B-V)=0.06, an inclination of 60° (CW Mon has eclipses of the accretion disk, and a white dwarf mass of 0.8<i>M</i><sub>⊙</sub>, our results indicate the presence of a 22-27,000 K white dwarf and a low mass accretion rate [Formula: see text], for a derived distance o ~200 to ~300 pc.</p>\",\"PeriodicalId\":55582,\"journal\":{\"name\":\"Astronomical Journal\",\"volume\":\"154 2\",\"pages\":\"\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2017-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.3847/1538-3881/aa774c\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Astronomical Journal\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.3847/1538-3881/aa774c\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2017/7/13 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"ASTRONOMY & ASTROPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomical Journal","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.3847/1538-3881/aa774c","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2017/7/13 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
Hubble COS Spectroscopy of the Dwarf Nova CW Mon: The White Dwarf in Quiescence?
We present a synthetic spectral analysis of the HST COS spectrum of the U Geminorum-type dwarf nova CW Mon, taken during quiescence as part of our COS survey of accreting white dwarfs in Cataclysmic Variables. We use synthetic photosphere and optically thick accretion disk spectra to model the COS spectrum as well as archival IUE spectra obtained decades ago when the system was in an even deeper quiescent state. Assuming a reddening of E(B-V)=0.06, an inclination of 60° (CW Mon has eclipses of the accretion disk, and a white dwarf mass of 0.8M⊙, our results indicate the presence of a 22-27,000 K white dwarf and a low mass accretion rate [Formula: see text], for a derived distance o ~200 to ~300 pc.
期刊介绍：
The Astronomical Journal publishes original astronomical research, with an emphasis on significant scientific results derived from observations. Publications in AJ include descriptions of data capture, surveys, analysis techniques, astronomical interpretation, instrumentation, and software and computing.
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