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The AM Canum Venaticorum binary SDSS J173047.59+554518.5
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Carter, P. J., Steeghs, D., Marsh, Tom, Kupfer, T., Copperwheat, Chris M., Groot, Paul J. and Nelemans, Gijs (2014) The AM Canum Venaticorum binary SDSS J173047.59+554518.5. Monthly Notices of the Royal Astronomical Society, Volume 437 (Number 3). pp. 2894-2900. doi:10.1093/mnras/stt2103
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WRAP_MNRAS-2014-Carter-2894-900.pdf - Published Version Available under License Creative Commons Attribution. Download (1241Kb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnras/stt2103
Abstract
The AM Canum Venaticorum (AM CVn) binaries are a rare group of hydrogen-deficient, ultrashort period, mass-transferring white dwarf binaries and are possible progenitors of Type Ia supernovae. We present time-resolved spectroscopy of the recently discovered AM CVn binary SDSS J173047.59+554518.5. The average spectrum shows strong double-peaked helium emission lines, as well as a variety of metal lines, including neon; this is the second detection of neon in an AM CVn binary, after the much brighter system GP Com. We detect no calcium in the accretion disc, a puzzling feature that has been noted in many of the longer period AM CVn binaries. We measure an orbital period, from the radial velocities of the emission lines, of 35.2 ± 0.2 min, confirming the ultracompact binary nature of the system. The emission lines seen in SDSS J1730 are very narrow, although double-peaked, implying a low-inclination, face-on accretion disc; using the measured velocities of the line peaks, we estimate i ≤ 11°. This low inclination makes SDSS J1730 an excellent system for the identification of emission lines.
| 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): | White dwarf stars , Double stars, Cataclysmic variable stars , Accretion (Astrophysics) | ||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
| Publisher: | Oxford University Press | ||||
| ISSN: | 0035-8711 | ||||
| Official Date: | 2014 | ||||
| Dates: |
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| Volume: | Volume 437 | ||||
| Number: | Number 3 | ||||
| Page Range: | pp. 2894-2900 | ||||
| DOI: | 10.1093/mnras/stt2103 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Science and Technology Facilities Council (Great Britain) (STFC), Netherlands Research School for Astronomy (NOVA), Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO) | ||||
| Grant number: | ST/I001719/1 (STFC) |
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