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http://dx.doi.org/10.5303/PKAS.2009.24.1.009

NEW VARIABLE STARS IN THE REGION OF THE OPEN CLUSTER M38 (NGC 1912) I: δ SCUTI AND γ DORADUS TYPE STARS  

Jeon, Young-Beom (Korea Astronomy and Space Science Institute)
Publication Information
Publications of The Korean Astronomical Society / v.24, no.1, 2009 , pp. 9-18 More about this Journal
Abstract
From the short-period variability survey (SPVS) in Bohyunsan Optical Astronomy Observatory, we obtained time-series BV CCD images in the region of an open cluster M38 (NGC 1912) for 23 nights from February 1, 2007 to December 7, 2008. We found 18 $\delta$ Scuti stars and 2 $\gamma$ Doradus stars. Among them, only 3 $\delta$ Scuti stars were known ones. From the color-magnitude diagram (CMD) of M38, most of them have been located in the instability strip. The two $\gamma$ Doradus stars have been located within $\gamma$ Doradus strip of M38. But, only four $\delta$ Scuti stars were located within radius 10' from the center of M38. To confirm of their membership for M38, we need more study, such as, proper motion by spectroscopic observation.
Keywords
clusters; M38; NGC 1912; stars: variables; $\delta$ Scuti; $\gamma$ Doradus;
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Times Cited By KSCI : 4  (Citation Analysis)
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