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Title: First photometric study of the very short period K-type contact binary 1SWASP J064501.21+342154.9

The first high precision CCD photometric light curves of 1SWASP J064501.21+342154.9 were obtained in 2013 February along with several new times of minimum light. The multi-color light curves were analyzed using the Wilson-Devinney code. Photometric solutions reveal that the system is a W-type shallow contact binary with a mass ratio of q = 2.110 ± 0.007 and a degree of contact of f = 15.3% ± 2.1%. A third light contributing about 2% of the total luminosity in the I band was found. It may come from a cool tertiary component. A small spot found on the surface of the binary indicates that the solar-like activities are at a low level at present.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011 (China)
  2. National Astronomical Research Institute of Thailand/Ministry of Science and Technology, Bangkok (Thailand)
  3. Department of Physics and Astronomy, University of Nebraska, 1400 R Street, Lincoln, NE 68588 (United States)
Publication Date:
OSTI Identifier:
22340010
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (New York, N.Y. Online); Journal Volume: 147; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCURACY; CHARGE-COUPLED DEVICES; COLOR; DIAGRAMS; ECLIPSE; LUMINOSITY; MASS; MATHEMATICAL SOLUTIONS; STAR EVOLUTION; STARS; SURFACES; VISIBLE RADIATION