2014A&A...563A..34L


Query : 2014A&A...563A..34L

2014A&A...563A..34L - Astronomy and Astrophysics, volume 563A, 34-34 (2014/3-1)

Parameters of two low-mass contact eclipsing binaries near the short-period limit.

LOHR M.E., HODGKIN S.T., NORTON A.J. and KOLB U.C.

Abstract (from CDS):

The two objects 1SWASP J150822.80-054236.9 and 1SWASP J160156.04+202821.6 were initially detected from their SuperWASP archived light curves as candidate eclipsing binaries with periods close to the short-period cut-off of the orbital period distribution of main-sequence binaries, at ∼0.2d. Using spectroscopic data from the Isaac Newton Telescope in La Palma, Canary Islands, we here confirm them as double-lined spectroscopic and eclipsing binaries, in contact configuration. Following modelling of their visual light curves and radial velocity curves, we determine their component and system parameters to precisions between ∼2 and 11%. The first system contains components of 1.07 and 0.55M, with radii of 0.90 and 0.68R, respectively; its primary exhibits pulsations with a period of 1/6 of the orbital period of the system. The latter contains components of 0.86 and 0.57M, with radii of 0.75 and 0.63R, respectively.

Abstract Copyright:

Journal keyword(s): binaries: close - binaries: eclipsing - binaries: spectroscopic - stars: individual: 1SWASP J150822.80-054236.9 - stars: individual: 1SWASP J160156.04+202821.6

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 1SWASP J150822.80-054236.9 EB* 15 08 22.7872590552 -05 42 36.898208784     12.45 12.306   ~ 17 0
2 1SWASP J160156.04+202821.6 EB* 16 01 56.0393264112 +20 28 21.535058244     13.81     ~ 21 0

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