Light Curve Solutions of an Eclipsing Binary OGLE-GD-ECL-04451 with a Dramatic Change in Amplitude

2016/02/04 by Gang Li, Gang, Li, yanping, Zhang +2
Physics and Astronomy · #Stellar, planetary, and galactic studies #Gamma-ray bursts and supernovae #Astronomy and Astrophysical Research

paper · pdf · doi:10.48550/arxiv.1602.01552

Abstract

We present light curve solutions of the W UMa-type eclipsing binary OGLE-GD-ECL-04451, observed by both the Optical Gravitational Lensing Ex-periment (OGLE) program in 2006 and the Antarctica Survey Telescope (AST3-1) in 2012 at Dome A. We analyzed this binary system with the Wilson-Devinney(W-D) method 2013 version and derived the mass ratio q=2.91 ± 0.07, the inclination i=76.86^∘ ± 0.23^∘, and the light variattion amplitud was 0^m.51 based on the OGLE data. From the AST3-1's data, we find that the amplitude dropped to 0^m.44(2012) and the difference of magnitudes of the two light maxima is 0^m.03. A hot spot was then added on the surface of the secondary to demonstrate the amplitude change and O'Conell effect of the binary system.

Related

• Examining the brightness variability, accretion disk, and evolutionary stage of the binary OGLE-LMC-ECL-14413
• The OGLE Collection of Variable Stars. Over 75 000 Eclipsing and Ellipsoidal Binary Systems in the Magellanic Clouds
• Ultra-Short-Period Binary Systems in the OGLE Fields Toward the Galactic Bulge
• The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. XII. Eclipsing Binary Stars in the Large Magellanic Cloud
• Towards early-type eclipsing binaries as extragalactic milestones: III. Physical properties of the O-type eclipsing binary OGLE LMC-ECL-21568 in a quadruple system