Photometry of the post-common-envelope binary PG 0308+096

Details Photometry of the post-common-envelope binary PG 0308+096 Photometry of the post-common-envelope binary PG 0308+096

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.280.1277s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 280, Issue 4, pp. 1277-1282.

Astronomy and Astrophysics

Astronomy

8

Binaries: Close, Stars: Individual: Pg 0308+096, Stars: Low-Mass, Brown Dwarfs, White Dwarfs

Scientific paper

We present R- and H-band photometry of PG 0308+096. We demonstrate that the orbital modulation is consistent with that of a dwarf M star heated by a DA white dwarf within the constraints given by the kinematic parameters. By fitting the photometry with an irradiation model we determine that the radius of the white dwarf is 0.019<=R_wd<=0.026 R_ (90 per cent confidence). In order to derive these limits, we have developed a fitting procedure that takes account of the external constraints derived from the spectroscopic analysis by Saffer et al. We determine that the period of the system is 0.286654+/-0.00000078d, which is one of the cycle count aliases considered by Saffer et al. We show that the Hα emission from the surface of the red star can be modelled as either optically thick or thin, but in the latter case the red dwarf must have intrinsic emission.

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