A possible expanding component in the extreme mass ratio deep contact binary V710 Monocerotis

L. Liu, W. P. Chen, W. W. Na, S. B. Qian, L. Zhang, B. Soonthornthum, P. Neelam, L. Y. Zhu, J. J. He, Z. T. Han

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We present CCD light curves of V710 Mon obtained in 2007 and 2013. By using the 2010 version of the W-D code, it is found that the star is a deep (59.5-62.7%) contact binary system, with an extreme mass ratio (0.143-0.183). The period of the system increases with a rate dP/dt=+1.95(±0.06) ×10-7 days/year. We propose that the system contains a post-main-sequence component which may be in an expanding phase. The time scale of the orbital increase nearly equals to the time for the post-main-sequence star to evolve into a subgiant. The age of the primary is estimated to be 5.34 Gyr.

Original languageEnglish
Pages (from-to)60-64
Number of pages5
JournalNew Astronomy
Volume31
DOIs
StatePublished - Aug 2014

Keywords

  • Stars: binaries: close
  • Stars: binaries: eclipsing
  • Stars: binaries: evolution
  • Stars: individual: V710 Mon

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