We present new photometric observations covering eight minima times for the eclipsing binary GSC 1042-
2191. The light curves in BVRI colors were analyzed by using WD-code for the system parameters. Eight minima times were obtained from the new observations. The system is found a low mass ratio (q = 0.148), A-type
over-contact binary with a fill out parameter of f = 65.01 ± 12.18%. The preliminary absolute dimensions
(M1= 1.26 ± 0.06 M, M2 = 0.18 ± 0.06 M, R1 = 1.54 ± 0.20 R, R2 = 0.69 ± 0.01 R, L1 =3.30 ± 0.30 L and
L2 = 0.59 ± 0.20 L) indicate the very much oversized and over-luminous secondary component, by assuming the present luminosity of the secondary is its main sequence luminosity, we predict the original mass is
about 0.8 M
, this means the present secondary could be transferred and/or lost 77% of its original mass and
only its core is left.
We present new photometric observations covering eight minima times for the eclipsing binary GSC 1042-2191. The light curves in BVRI colors were analyzed by using WD-code for the system parameters. Eight minima times were obtained from the new observations. The system is found a low mass ratio (q = 0.148), A-typeover-contact binary with a fill out parameter of f = 65.01 ± 12.18%. The preliminary absolute dimensions(M1= 1.26 ± 0.06 M, M2 = 0.18 ± 0.06 M, R1 = 1.54 ± 0.20 R, R2 = 0.69 ± 0.01 R, L1 =3.30 ± 0.30 L andL2 = 0.59 ± 0.20 L) indicate the very much oversized and over-luminous secondary component, by assuming the present luminosity of the secondary is its main sequence luminosity, we predict the original mass isabout 0.8 M, this means the present secondary could be transferred and/or lost 77% of its original mass andonly its core is left.
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