Photometric studies of two W UMa type variables in the field of distant open cluster NGC6866

Abstract

We present photometric analysis of the two W UMa type binaries identified in the field of distant open star cluster NGC6866. Although these systems, namely ID487 and ID494, were reported in the Joshi et al. (2012), but a detailed study of these stars has not been carried out earlier. The orbital periods of these stars are found to be 0.415110+/-0.000001 day and 0.366709+/-0.000004 day, respectively. Based on the photometric and infrared colours, we find their respective spectral types as K0 and K3. The photometric light variations of both the stars show O'Connell effect which could be explained by employing a dark spot on the secondary components. The V and I bands light curves are analyzed using the Wilson-Devinney (WD) code and relations given by Gazeas (2009) which yield radii and mass of the primary and secondary components of the star ID487 as R1 = 1.24+/-0.01 Rsun, R2 = 1.11+/-0.02 Rsun, and M1 = 1.24+/-0.02 Msun, M2 = 0.96+/-0.05 Msun, and for the star ID494 as R1 = 1.22+/-0.02 Rsun, R2 = 0.81+/-0.01 Rsun, and M1 = 1.20+/-0.06 Msun, M2 = 0.47+/-0.01 Msun.

arXiv comment12 pages, 7 figures, 2016, RAA, 16, 11

References in corpus (17)

• Absolute dimensions of the M-type eclipsing binary YY Geminorum (Castor C): a challenge to evolutionary models in the lower main-sequence
• Absolute Magnitude Calibration for the W UMa-type Systems Based on Hipparcos Data
• Eclipsing Binaries as Astrophysical Laboratories: Internal Structure, Convective Core Overshooting and Evolution of the B-star Components of V380 Cygni
• Radial Velocity Studies of Close Binary Stars. XV
• The cluster ages experiment (CASE). V. Analysis of three eclipsing binaries in the globular cluster M4
• VLT multi-object spectroscopy of 33 eclipsing binaries in the Small Magellanic Cloud. New distance and depth of the SMC, and a record-breaking apsidal motion
• The structure of contact binaries
• Absolute properties of the binary system BB Pegasi
• A comprehensive study of the open cluster NGC 6866
• The short-period low-mass binary system CC Com revisited
• Photometric Study and Detection of Variable Stars in the Open Clusters - I : NGC 6866
• CCD Photometric Study of the Contact Binary TX Cnc in the Young Open Cluster NGC 2632
• A photometric study of the Open Cluster II: Stellar population and dynamical evolution in NGC 559
• Open Clusters in the Kepler Field, II. NGC 6866
• BVRI Photometric and Polarimetric studies of W UMa type Eclipsing Binary FO Hydra
• Photometric Investigation of the Total-Eclipsing Contact Binary V12 in the Intermediate-age Open Cluster NGC 7789
• CCD photometric study of the W UMa-type binary II CMa in the field of Berkeley 33

Cited by in corpus (6)

• Photometric and Spectroscopic analysis of four contact binaries
• Long-term photometric and low-resolution spectroscopic analysis of five contact binaries
• Variable stars in the field of intermediate-age open cluster NGC 559
• The First Photometric and Spectroscopic Study of Contact Binary V2840 Cygni
• Investigating stellar variability in the open cluster region NGC 381
• Multi-wavelength photometric study of five contact binaries in the field of globular cluster M4