The Library
A J-band detection of the donor star in the dwarf nova OY Carinae and an optical detection of its 'iron curtain'
Tools
Copperwheat, C. M., Marsh, T. R., Parsons, S. G., Hickman, R. D. G., Steeghs, D., Breedt, E., Dhillon, V. S., Littlefair, S. P. and Savoury, C. D. J. (2012) A J-band detection of the donor star in the dwarf nova OY Carinae and an optical detection of its 'iron curtain'. Monthly Notices of the Royal Astronomical Society, Vol.421 (No.1). pp. 149-158. doi:10.1111/j.1365-2966.2011.20282.x ISSN 0035-8711.
|
Text
WRAP_steeghs_JBand_detection_1111.6775v1.pdf - Accepted Version Download (3545Kb) | Preview |
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2011.20282.x
Abstract
Purely photometric models can be used to determine the binary parameters of eclipsing cataclysmic variables (CVs) with a high degree of precision. However, the photometric method relies on a number of assumptions, and to date there have been very few independent checks of this method in the literature. We present time-resolved spectroscopy of the P= 90.9 min eclipsing CV OY Carinae obtained with X-shooter on the Very Large Telescope (VLT), in which we detect the donor star from Ki lines in the J band. We measure the radial velocity amplitude of the donor star K 2= 470.0 ± 2.7 kms -1, consistent with predictions based upon the photometric method (470 ± 7 kms -1). Additionally, the spectra obtained in the UVB arm of X-shooter show a series of Fei and Feii lines with a phase and velocity consistent with an origin in the accretion disc. This is the first unambiguous detection at optical wavelengths of the 'iron curtain' of disc material which has been previously reported to veil the white dwarf in this system. The velocities of these lines do not track the white dwarf, reflecting a distortion of the outer disc that we see also in Doppler images. This is evidence for considerable radial motion in the outer disc, at up to 90 kms -1 towards and away from the white dwarf.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Cataclysmic variable stars, Eclipsing binaries, Astronomical photometry, White dwarf stars | ||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
Publisher: | Wiley | ||||
ISSN: | 0035-8711 | ||||
Official Date: | March 2012 | ||||
Dates: |
|
||||
Volume: | Vol.421 | ||||
Number: | No.1 | ||||
Page Range: | pp. 149-158 | ||||
DOI: | 10.1111/j.1365-2966.2011.20282.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 20 December 2015 | ||||
Date of first compliant Open Access: | 20 December 2015 | ||||
Funder: | Science and Technology Facilities Council (Great Britain) (STFC) |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year