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Spectroscopy from the Hubble Space Telescope Cosmic Origins Spectrograph of the Southern Nova-like BB Doradus in an Intermediate State

Journal
Date Issued
2016
Author(s)
Godon, Patrick
•
Sion, Edward M.
•
Gänsicke, Boris T.
•
Hubeny, Ivan
•
•
Pala, Anna F.
•
Rodríguez-Gil, Pablo
•
Szkody, Paula
•
Toloza, Odette
DOI
Abstract
We present a spectral analysis of the spectrum from the Hubble Space Telescope Cosmic Origins Spectrograph (HST/COS) of the southern VY Scl nova-like variable BB Doradus, obtained as part of a Cycle 20 HST/COS survey of accreting white dwarfs (WDs) in cataclysmic variables. BB Dor was observed with COS during an intermediate state with a low mass accretion rate, thereby allowing an estimate of the WD temperature. The results of our spectral analysis show that the WD is a significant far-ultraviolet (FUV) component of the spectrum with a temperature of about 35,000-50,000 K, assuming a WD mass of 0.80 {M}☉ ({log}(g)=8.4). The disk, with a mass accretion rate of ≈ {10}-10 {M}☉ {{yr}}-1, contributes about 1/5 to 1/2 of the FUV flux.
Volume
833
Issue
2
Start page
146
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2016ApJ...833..146G
Rights
open.access
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