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NEW VARIABLE STARS IN THE REGION OF THE OPEN CLUSTER M38 (NGC 1912) II

산개성단 M38(NGC 1912) 영역의 새로운 변광성 II

  • Received : 2010.03.19
  • Accepted : 2010.04.19
  • Published : 2010.06.30
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Abstract

Next to Paper I (Jeon 2009a), time-series BV CCD images of the open cluster M38 were taken for 4 nights on December, 2009. The observations have been carried out for total 27 nights. In addition to the 20 variable stars in the Paper I, the discovery of 44 new variable stars has been presented in this paper: $6{\delta}$ Scuti stars, $2{\gamma}$ Doradus stars, 18 eclipsing binaries and 18 semi-long periodic and/or slow irregular type variable stars. For the V photometry of the ${\delta}$ Scuti and ${\gamma}$ Doradus stars, multi-frequency analysis was performed using the Discrete Fourier Transform and linear least-square fitting. The period search for the eclipsing binaries and the semi-long periodic and/or slow irregular type variable stars was performed by phase fitting method. As a result, the periods for 23 variable stars among the 44 ones were defined.

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References

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  1. NEW VARIABLE STARS IN THE REGION OF THE OPEN CLUSTER M35 (NGC 2168) vol.25, pp.4, 2010, https://doi.org/10.5303/PKAS.2010.25.4.167