Title of article :
2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system?
Author/Authors :
Hauschildt، P. H. نويسنده , , Handler، G. نويسنده , , Pretorius، M. L. نويسنده , , Napiwotzki، R. نويسنده , , Kim، S.-L. نويسنده , , Park، B.-G. نويسنده , , Schuh، S. L. نويسنده , , Dreizler، S. نويسنده , , Drechsel، H. نويسنده , , Medupe، R. نويسنده , , Karl، C. نويسنده , , Wood، M. A. نويسنده , , Paparo، M. نويسنده , , Szeidl، B. نويسنده , , Viraghalmy، G. نويسنده , , Zsuffa، D. نويسنده , , Hashimoto، O. نويسنده , , Kinugasa، K. نويسنده , , Taguchi، H. نويسنده , , Kambe، E. نويسنده , , Leibowitz، E. نويسنده , , Ibbetson، P. نويسنده , , Lipkin، Y. نويسنده , , Nagel، T. نويسنده , , Gohler، E. نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
-648
From page :
649
To page :
0
Abstract :
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 2MASS J0516288+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 1.29 d, 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 T2/T1~~1 and an inclination of 74°. The spectral anaylsis results in a T eff=4200 K 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.
Keywords :
2MASS J0516288+260738 , ephemerides , stars , variables , general , binaries , eclipsing , low-mass , Individual , brown dwarfs
Journal title :
Astronomy and Astrophysics
Serial Year :
2003
Journal title :
Astronomy and Astrophysics
Record number :
78167
Link To Document :
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