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The eclipsing binary V 836 Cygni: Photometric evidence for an early evolutionary status

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Abstract

ThreeUBV light curves of the short-period EB-type eclipsing binary V 836 Cyg, observed in 1971, 1976 and 1980, are presented. The instability of the light curve found by previous authors is confirmed. However, the activity was not very strong between 1971 and 1980. From the observed period variation, previous light-curve analysis data and spectroscopic data it is concluded that V 836 Cyg consists of two main-sequence stars, and will undergo rapid mass exchange before terminating the main sequence (case A evolution).

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Authors and Affiliations

  1. Sternwarte der Universität Bonn, 5300, Bonn, F R Germany

    R. A. Breinhorst

  2. Observatorium Hoher List der Universitäts-Sternwarte Bonn, 5568, Daun, F R Germany

    H. W. Duerbeck

Authors
  1. R. A. Breinhorst
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  2. H. W. Duerbeck
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Visiting astronomer, Kitt Peak National Observatory, operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation

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Breinhorst, R.A., Duerbeck, H.W. The eclipsing binary V 836 Cygni: Photometric evidence for an early evolutionary status. J Astrophys Astron 3, 219–231 (1982). https://doi.org/10.1007/BF02714862

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  • DOI: https://doi.org/10.1007/BF02714862

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