Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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ON THE VARIABILITY OF BLUE STRAGGLER STARS IN THE GLOBULAR CLUSTER M53

  • Rey, Soo-Chang (Center for Space Astrophysics & Department of Astronomy, Yonsei University) ;
  • Lee, Young-Wook (Center for Space Astrophysics & Department of Astronomy, Yonsei University) ;
  • Byun, Yong-Ik (Center for Space Astrophysics & Department of Astronomy, Yonsei University) ;
  • Chun, Mun-Suk (Department of Astronomy, Yonsei University)
  • Published : 1998.06.01
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Abstract

We present the results of a search for photometric variable blue straggler stars(BSSs) in the globular cluster M53. Six of 151 probable BSSs are identified as variable candidates based on the robust variable star detection technique of Welch & Stetson (1993). Most variable BSS candidates appear to occupy the instability strip in the color-magnitude deagram, and they appear to have visual light amplitudes of 0.2 mag-0.3 mag. Further observations are required, however, to resolve the natrue of variabil-ity between pulsating stars and eclipsing binaries for these variable BSS candidates.

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References

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