期刊
ASTRONOMICAL JOURNAL
卷 127, 期 5, 页码 2659-2673出版社
UNIV CHICAGO PRESS
DOI: 10.1086/383290
关键词
stars : activity; stars : pre-main-sequence; X-rays : stars
We present results of a Chandra observation of a field in NGC 2264. The observations were taken with the ACIS-I camera with an exposure time of 48.1 ks. We present a catalog of 263 sources, which includes X-ray luminosity, optical and infrared photometry, and X-ray variability information. We found 41 variable sources, 14 of which have a flarelike light curve, and two of which have a pattern of a steady increase or decrease over a 10 hr period. The optical and infrared photometry for the stars identified as X-ray sources are consistent with most of these objects being pre-main-sequence stars with ages younger than 3 Myr.
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