Light curve analysis of the short period eclipsing binary RT and

YY Eri, the short-period binary system, is a W UMa type of the eclipsing binary system. This study using a 0.7-meter telescope with CCD photometric system in B V and R filters. It was observed at the Regional Observatory for the Public, Chachoengsao, Thailand on December 5, 2018, UT. The MaxIm DL software was used to analyzed the images photometry to produce the light curve. The Wilson-Devinney technique was computed the synthetic light curve that prefer to the physical properties of the YY Eri. The results show that the effective temperature of the primary and secondary star was 5533 and 5598 K, respectively. The inclination is 81.450 and the mass ratio is 0.55. The degree of contact was calculated as 16.64%

Download Full-text

Light curve analysis of the eclipsing binary system V781 Tau

Journal of Physics Conference Series ◽

10.1088/1742-6596/2145/1/012005 ◽

2021 ◽

Vol 2145 (1) ◽

pp. 012005

Author(s):

N Lamlert ◽

W Maithong

Keyword(s):

Binary System ◽

Light Curve ◽

Orbital Period ◽

Binary Systems ◽

Curve Analysis ◽

Photometric System ◽

Light Curve Analysis ◽

Eclipsing Binary ◽

The Public ◽

Secondary Star

Abstract V781 Tau is one of W UMa eclipsing binary systems whose orbital period is 0.34 days. The 0.7-meter telescope with CCD photometric system in B and V filters was conducted at the Regional Observatory for the Public, Chachoengsao, Thailand during December 2018, UT. The Wilson-Devinney Technique was used for calculating the physical properties of V781 Tau. The results showed the inclination of their orbital is 66.140°±0.14. The effective temperature of the primary and secondary star is 6,060 and 5,881 K, respectively and the degree of contact is 4.38 %

Download Full-text

Synthetic Light Curve Analysis of the Close Binary Systems BX Andromedae and RR Leporis

International Astronomical Union Colloquium ◽

10.1017/s025292110008814x ◽

1989 ◽

Vol 107 ◽

pp. 359-360

Author(s):

R.G. Samec ◽

R.E. Fuller ◽

R. H. Kaitchuck ◽

B. B. Bookmyer ◽

D. R. Faulkner

Keyword(s):

Light Curve ◽

Binary Systems ◽

Thermal Relaxation ◽

Curve Analysis ◽

Light Curves ◽

Close Binary ◽

Comparison Star ◽

Short Time Scale ◽

Light Curve Analysis ◽

Short Period

AbstractUnpublished photoelectric observations of the systems BX And and RR Lep were subjected to light curve analysis using the Wilson-Devinney Code.The short-period eclipsing binary system BX And was observed on five nights in 1976 at the Morgan-Monroe station of the Goethe Link Observatory of Indiana University. The observations covering the eclipse portions of the light curves yielded four times of minimum light. A period study covering 89 years of observations confirms that a major period change took place about 1950. The system is suspected of being quite active on a short time scale. Standard magnitudes were derived for BX And and for the comparison star. The corrected color indices indicate that BX And and the comparison star BD+39° 476 are in the spectral range of F3-F5. The light curves, defined by 1092 observations in B, 1097 in V and 971 in the U filter are symmetric. The difference in the eclipse depths are quite large averaging 0.m46. A distinct de-reddening of the light curves occurs during the secondary eclipse. The first synthetic light curve solutions of the system were obtained. The solution of BX And indicates that the system consists of an F-type primary and a K-type secondary component in a state of shallow contact. This result is supported by the location of BX And on the Eggen period-color diagram for contact binaries. The large mass ratio, temperature disparity and period increase are found to be consistent with an early contact phase of thermal relaxation oscillations.

Download Full-text