C.D.S. - SIMBAD4 rel 1.7 - 2021.05.07CEST15:53:07

2000A&AS..142...31L - Astron. Astrophys., Suppl. Ser., 142, 31-34 (2000/February-2)

A period study of the W UMa type contact binary V781 Tauri.

LIU Q. and YANG Y.

Abstract (from CDS):

New times of minimum light determined from the observations of the W UMa type contact binary V781 Tau are presented. According to these times of minima and those collected from the references, the change in the orbital period of the system is analyzed. The result reveals that the orbital period of V781 Tau decreased continually from 1949 to 1998 and the change rate in the period is δp/p=-5.0x10–11. The decrease in the period of the binary is explained by a model of the contracting secondary component of the system. The shrinking velocity of 6.77x10–5cm/s as responsible for the change in the orbital period of the system is obtained, which is in agreement with the results shown in the study of the thermal relaxation oscillation of contact binaries by Wang (1994).

Abstract Copyright:

Journal keyword(s): stars: binaries: close - stars: binaries: general - stars: kinematics

CDS comments: Table 1: comparison stars are GSC 01870-00514 and GSC 01870-00458. In ref list FLANNERY 1976ApJ...205..217F instead of ApJ.205.317

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 V* V781 Tau EB* 05 50 13.1257943382 +26 57 43.362139205   9.28 8.67   7.976 G0 100 0
2 BD+26 972 * 05 50 22.3936431858 +26 59 54.992164672   10.13 9.68     ~ 5 0
3 V* V1239 Tau EB* 05 50 25.8818118795 +26 56 50.602515552   10.91 10.89     ~ 9 1

    Equat.    Gal    SGal    Ecl

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