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|Title: ||Chandra X-ray observations of young clusters : II. Orion Flanking Fields Data|
|Authors: ||Ramírez, Solange V.|
Kopan, Eugene L.
|Issue Date: ||Aug-2004 |
|Publisher: ||American Astronomical Society|
|Citation: ||The Astronomical Journal 128, 787-804, August 2004, doi: 10.1086/422349|
|Abstract: ||We present results of Chandra observations of two flanking fields (FFs) in Orion, outside the Orion Nebula Cluster (ONC). The observations were taken with the ACIS-I camera with an exposure time of about 48 ks each field. We present a catalog of 417 sources, which includes X-ray luminosity, optical and infrared photometry, and X-ray variability information. We have found 91 variable sources, 33 of which have a flarelike light curve and 11 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 10 Myr. We present evidence for an age difference among the X-ray–selected samples of NGC 2264, Orion FFs, and ONC, with NGC 2264 being the oldest and ONC being the youngest.|
|Appears in Collections:||JPL TRS 1992+|
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