Detection of Hard X-Rays from a Class I Protostar in HH24-26 Region

Details Detection of Hard X-Rays from a Class I Protostar in HH24-26 Region Detection of Hard X-Rays from a Class I Protostar in HH24-26 Region

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc..314o&link_type=abstract

Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam

Physics

Scientific paper

We observed the HH24-26 region in the L1630 Orion molecular cloud with the X-ray observatory ASCA in the 0.5 - 10 keV band. X-ray emission was detected from the Class I protostar SSV63E+W and the T Tauri star SSV61. The spectra of both SSV63E+W and SSV61 are well explained by a thermal plasma model of high and low temperatures, respectively. We obtained an evidence that the protostar SSV63E+W is embedded deeply in the surrounding dust envelope. The X-ray light curve of SSV63E+W showed an X-ray flare during the observation. The 0.5 - 10 keV luminosity of SSV63E+W was about 1x1032 erg s-1 in the quiescent state. Present detection of hard X-rays from SSV63E+W is remarkable, because this is the first X-ray detection of a protostar in Orion.

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