Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-19
Astron.Astrophys.410:649-662,2003
Astronomy and Astrophysics
Astrophysics
15 pages, 9 figures, accepted for publication in Astronomy&Astrophysics. Revised version: optimized formatting only, no other
Scientific paper
10.1051/0004-6361:20031241
We report the discovery of a new eclipsing system less than one arcminute south of the pulsating DB white dwarf KUV 05134+2605. The object could be identified with the point source 2MASSJ0516288+260738 published by the Two Micron All Sky Survey. We present and discuss the first light curves as well as some additional colour and spectral information. The eclipse period of the system is 1.29d, and, assuming this to be identical to the orbital period, the best light curve solution yields a mass ratio of m2/m1=0.11, a radius ratio of r2/r1~1 and an inclination of 74 deg. The spectral anaylsis results in a Teff=4200K for the primary. On this basis, we suggest that the new system probably consists of a late K + Brown dwarf (which would imply a system considerably younger than ~0.01 Gyr to have r2/r1~1), and outline possible future observations.
Drechsel Horst
Dreizler Stefan
Goehler E.
Handler Gerald
Hashimoto Osamu
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