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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. (Paul J.), Marsh, T. R., Steeghs, D. (Danny), 1972- 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. 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 |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Faculty of 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-Blackwell Publishing, Inc |
| ISSN: | 0035-8711 |
| Date: | 1 February 2006 |
| Volume: | Vol.365 |
| Number: | No.4 |
| Number of Pages: | 5 |
| Page Range: | pp. 1109-1113 |
| Identification Number: | 10.1111/j.1365-2966.2005.09727.x |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| 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) |
| References: | Anderson S. F. et al., 2005, AJ, submitted (astro-ph/0506730) Chornock R., Filippenko A. V., 2003, IAUC, 8084 Marsh T. R., Horne K., 1988, MNRAS, 235, 269 Marsh T. R., Horne K., Rosen S., 1991, ApJ, 366, 535 Nather R. E., Robinson E. L., Stover R. J., 1981, ApJ, 224, 269 Nelemans G., 2005, ASPC, 330, 27 (astro-ph/0409676) Nelemans G., Steeghs D., Groot P. J., 2001, MNRAS, 326, 621 Nogami D., Monard B., Retter A., Liu A., Uemura M., Ishioka R., Imada A., Kato T., 2004, PASJ, 56L, 39 Patterson J. et al., 2005, PASP, in press (astro-ph/0507371) Roelofs G. H. A., Groot P. J., Marsh T. R., Steeghs D., Barros S. C. C, Nelemans G., 2005, MNRAS, 361, 487 Wood-Vasey W. M., Aldering G., Nugent P., Li K., 2003, IAUC, 8077 Woudt P. A., Warner B., 2003, MNRAS, 345, 1266 Woudt P. A., Warner B., 2005, IAUC, 8531 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/33932 |
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