2006 Supplement 1: WORKSHOP ON MULTIFREQUENCY BEHAVIOUR OF HIGH ENERGY COSMIC SOURCES: Frascati, 2005 / Koyama

Chandra Observations of the ρ Ophiuchi Cloud

Katsuji Koyama, Kensuke Imanishi

Abstract


Chandra observed two regions near the cores of the ρ Ophiuchi dark cloud. A 100-ks exposure for each observation revealed ~ 200 X-ray sources above the detection limit of ~1028 erg s−1. About 60% (110) are identified with an optical and/or infrared counterpart, including significant numbers of Class I sources and brown dwarfs. Three Class 0 candidates are newly discovered with the X-rays. Many X-ray flares, possibly due to the magnetic activity, are found from all of the Classes. We report the results of the systematic spectral and timing analysis on the quiescent and flare X-rays.


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DOI: https://doi.org/10.1088/1009-9271/6/S1/13

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