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  A 15.7-minAM CVn binary discovered in K2

Green, M. J., Hermes, J. J., Marsh, T. R., Steeghs, D. T. H., Bell, K. J., Littlefair, S. P., et al. (2018). A 15.7-minAM CVn binary discovered in K2. Monthly Notices of the Royal Astronomical Society, 477(4), 5646-5656. doi:10.1093/mnras/sty1032.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-C295-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-C296-8
Genre: Journal Article

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 Creators:
Green, M J, Author
Hermes, J J, Author
Marsh, T R, Author
Steeghs, D T H, Author
Bell, Keaton J.1, Author              
Littlefair, S P, Author
Parsons, S G, Author
Dennihy, E, Author
Fuchs, J T, Author
Reding, J S, Author
Kaiser, B C, Author
Ashley, R P, Author
Breedt, E, Author
Dhillon, V S, Author
Fusillo, N P Gentile, Author
Kerry, P, Author
Sahman, D I, Author
Affiliations:
1Max Planck Research Group in Stellar Ages and Galactic Evolution (SAGE), Max Planck Institute for Solar System Research, Max Planck Society, ou_2265636              

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Free keywords: binaries: close, stars: dwarf novae, stars: individual: SDSS J135154.46-064309.0, novae, cataclysmic variables, white dwarfs
 Abstract: We present the discovery of SDSS J135154.46−064309.0, a short-period variable observed using 30-mincadence photometry in K2 Campaign 6. Follow-up spectroscopy and high-speed photometry support a classification as a new member of the rare class of ultracompact accreting binaries known as AM CVn stars. The spectroscopic orbital period of 15.65 ± 0.12 min makes this system the fourth-shortest-period AM CVn known, and the second system of this type to be discovered by the Kepler spacecraft. The K2 data show photometric periods at 15.7306 ± 0.0003 min, 16.1121 ± 0.0004 min, and 664.82 ± 0.06 min, which we identify as the orbital period, superhump period, and disc precession period, respectively. From the superhump and orbital periods we estimate the binary mass ratio q = M2/M1= 0.111 ± 0.005, though this method of mass ratio determination may not be well calibrated for helium-dominated binaries. This system is likely to be a bright foreground source of gravitational waves in the frequency range detectable by Laser Interferometer Space Antenna, and may be of use as a calibration source if future studies are able to constrain the masses of its stellar components.

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Language(s): eng - English
 Dates: 2018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/sty1032
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 477 (4) Sequence Number: - Start / End Page: 5646 - 5656 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150