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

Journal Article · Sat Feb 01 00:00:00 EST 2014 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/147/2/41· OSTI ID:22340010

Liu, N. -P.; Qian, S. -B.; Liao, W. -P.; Zhu, L. -Y.; He, J. -J.; Liu, L.; Zhao, E. -G. ^[1]; Soonthornthum, B. ^[2]

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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)

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.

• OSTI ID: 22340010
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 147, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

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