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Phase-resolved spectroscopy of the helium dwarf nova 'SN 2003aw' in quiescence
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Roelofs, Gijs H. A., Groot, P. J., Marsh, T. R., Steeghs, D. and Nelemans, G. (2006) Phase-resolved spectroscopy of the helium dwarf nova 'SN 2003aw' in quiescence. Monthly Notices of the Royal Astronomical Society, Vol.365 (No.4). pp. 1109-1113. doi:10.1111/j.1365-2966.2005.09727.x ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1111/j.1365-2966.2005.09727.x
Abstract
High time resolution spectroscopic observations of the ultracompact helium dwarf nova 'SN 2003aw' in its quiescent state at V similar to 20.5 reveal its orbital period at 2027.8 +/- 0.5 s or 33.80 min. Together with the photometric 'superhump' period of 2041.5 +/- 0.5 s, this implies a mass ratio q approximate to 0.036. We compare both the average and time-resolved spectra of 'SN 2003aw' and Sloan Digital Sky Survey (SDSS) J124058.03-015919.2. Both show a DB white dwarf spectrum plus an optically thin, helium-dominated accretion disc. 'SN 2003aw' distinguishes itself from the SDSS source by its strong calcium H & K emission lines, suggesting higher abundances of heavy metals than the SDSS source. The silicon and iron emission lines observed in the SDSS source are about twice as strong in 'SN 2003aw'. The peculiar 'double bright spot' accretion disc feature seen in the SDSS source is also present in time-resolved spectra of 'SN 2003aw', albeit much weaker.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Dwarf novae, Cataclysmic variable stars | ||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
Publisher: | Wiley | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 1 February 2006 | ||||
Dates: |
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Volume: | Vol.365 | ||||
Number: | No.4 | ||||
Number of Pages: | 5 | ||||
Page Range: | pp. 1109-1113 | ||||
DOI: | 10.1111/j.1365-2966.2005.09727.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 16 December 2015 | ||||
Date of first compliant Open Access: | 16 December 2015 | ||||
Funder: | Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO), Smithsonian Astrophysical Observatory, Particle Physics and Astronomy Research Council (Great Britain) (PPARC) | ||||
Grant number: | 639.042.201 (NWO), 639.041.405 (NWO) |
Data sourced from Thomson Reuters' Web of Knowledge
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