矮新星CW Mon的哈勃COS光谱:静止的白矮星?

IF 5.1 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astronomical Journal Pub Date : 2017-08-01 Epub Date: 2017-07-13 DOI:10.3847/1538-3881/aa774c

Connor Hause, Edward M Sion, Patrick Godon, T Gänsicke Boris, Paula Szkody, Domitilla de Martino, Anna Pala

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引用次数: 1

摘要

我们对双子星U型矮新星CW Mon的HST COS光谱进行了合成光谱分析，这是我们在大变星中对吸积白矮星进行COS调查时在静止期间拍摄的。我们使用合成光球和光学厚吸积盘光谱来模拟COS光谱，以及几十年前在系统处于更深的静止状态时获得的存档IUE光谱。假设红度为E(B-V)=0.06，倾角为60°(CW月亮有吸积盘的日食)，白矮星质量为0.8M⊙，我们的结果表明存在一颗22-27,000 K的白矮星和一个低质量吸积率[公式:见原文]，导出距离为~200 ~ ~ 300pc。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Hubble COS Spectroscopy of the Dwarf Nova CW Mon: The White Dwarf in Quiescence?

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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.

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来源期刊

Astronomical Journal 地学天文-天文与天体物理

CiteScore

8.40

自引率

24.50%

发文量

501

审稿时长

2-4 weeks

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.