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Unstable Behavior of the W UMa-Type Contact Binary V1073 Cygni

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Abstract

Observational evidence of unstable behavior for the W UMa-type binary system V1073 Cygni is presented in this paper.Having collected 111 times of minimum light during 1930–1998, we analyzed the change in the orbital period of this system. A perioddecrease was detected. Comparing the photoelectricobservations in 1963–64 with that made in 1988–91, obvious variable O'Connell effect of the light curves in V can be seen. Possible reasons for the unstable behavior of V1073 Cyg were discussed.

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Authors and Affiliations

  1. Yunnan Observatory, Academia Sinica, Kunming, China

    Yulan Yang & Qingyao Liu

  2. United Laboratory of Optical Astronomy, Chinese Academy of Sciences, China

    Yulan Yang & Qingyao Liu

  3. National Astronomical Observatories, Chinese Academy of Sciences, China

    Yulan Yang & Qingyao Liu

Authors
  1. Yulan Yang
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  2. Qingyao Liu
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Yang, Y., Liu, Q. Unstable Behavior of the W UMa-Type Contact Binary V1073 Cygni. Astrophysics and Space Science 274, 799–807 (2000). https://doi.org/10.1023/A:1026545905650

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