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A parameter study of the eclipsing CV in the Kepler field, KIS J192748.53+444724.5
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Littlefair, S. P., Dhillon, V. S., Gänsicke, B. T. (Boris T.), Bours, Madelon C. P., Copperwheat, C. M. and Marsh, T. R. (2014) A parameter study of the eclipsing CV in the Kepler field, KIS J192748.53+444724.5. Monthly Notices of the Royal Astronomical Society, Volume 443 (Number 1). pp. 718-724. doi:10.1093/mnras/stu1158 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stu1158
Abstract
We present high-speed, three-colour photometry of the eclipsing dwarf nova KIS J192748.53+444724.5 (KISJ1927) which is located in the Kepler field. Our data reveal sharp features corresponding to the eclipses of the accreting white dwarf followed by the bright spot where the gas stream joins the accretion disc. We determine the system parameters via a parametrized model of the eclipse fitted to the observed light curve. We obtain a mass ratio of q = 0.570 ± 0.011 and an orbital inclination of 84 ∘.6 ± 0 ∘.3. The primary mass is Mw = 0.69 ± 0.07 M⊙. The donor star's mass and radius are found to be Md = 0.39 ± 0.04 M⊙ and Rd = 0.43 ± 0.01 R⊙, respectively. From the fluxes of the white dwarf eclipse, we find a white dwarf temperature of Tw = 23000 ± 3000 K, and a photometric distance to the system of 1600 ± 200 pc, neglecting the effects of interstellar reddening. The white dwarf temperature in KISJ1927 implies the white dwarf is accreting at an average rate of M˙=1.4±0.8×10−9 M⊙ yr−1, in agreement with estimates of the secular mass loss rate from the donor.
| Item Type: | Journal Article | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||
| Publisher: | Oxford University Press | ||||||||||
| ISSN: | 0035-8711 | ||||||||||
| Official Date: | 1 September 2014 | ||||||||||
| Dates: |
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| Volume: | Volume 443 | ||||||||||
| Number: | Number 1 | ||||||||||
| Page Range: | pp. 718-724 | ||||||||||
| DOI: | 10.1093/mnras/stu1158 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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