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Spectroscopy from the Hubble space telescope cosmic origins spectrogragh of the southern nova-like BB Doradus in an intermedicate state

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Godon, Patrick, Sion, Edward M., Gänsicke, B. T. (Boris T.), Hubeny, Ivan, de Martino, Domitilla, Pala, Anna F., Rodríguez-Gil, Pablo, Szkody, Paula and Toloza, Odette (2016) Spectroscopy from the Hubble space telescope cosmic origins spectrogragh of the southern nova-like BB Doradus in an intermedicate state. The Astrophysical Journal, 833 (2). p. 146. doi:10.3847/1538-4357/833/2/146 ISSN 0004-637X.

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Official URL: http://dx.doi.org/10.3847/1538-4357/833/2/146

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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 $0.80\,{M}_{\odot }$($\mathrm{log}(g)=8.4$). The disk, with a mass accretion rate of $\approx {10}^{-10}\,{M}_{\odot }\,{\mathrm{yr}}^{-1}$, contributes about 1/5 to 1/2 of the FUV flux.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Cataclysmic variable stars , White dwarf stars, Spectrograph, Far ultraviolet radiation
Journal or Publication Title: The Astrophysical Journal
Publisher: Institute of Physics Publishing, Inc.
ISSN: 0004-637X
Official Date: 13 December 2016
Dates:
DateEvent
13 December 2016Published
10 October 2016Accepted
4 August 2016Submitted
Volume: 833
Number: 2
Page Range: p. 146
DOI: 10.3847/1538-4357/833/2/146
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 13 March 2017
Date of first compliant Open Access: 14 March 2017
Funder: European Research Council (ERC), Seventh Framework Programme (European Commission) (FP7), Istituto nazionale di astrofisica (Italy) (INAF)
Grant number: 320964(ERC); I/037/12/0(INAF);

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