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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
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Official URL: http://dx.doi.org/10.3847/1538-4357/833/2/146
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 | ||||||||
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| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of 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: |
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| 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 | ||||||||
| 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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