ASCA Observations of the Monoceros OB1 Molecular Cloud

Details ASCA Observations of the Monoceros OB1 Molecular Cloud ASCA Observations of the Monoceros OB1 Molecular Cloud

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc..318n&link_type=abstract

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

Computer Science

Scientific paper

We have made ASCA observations of the molecular cloud associated with the Mon OB1, and detected nine and five sources on the soft and the hard X-ray band images, respectively. Most of them are identified with known pre-main sequence stars or protostellar objects. Within the ASCA SIS field, three molecular outflows are located. All the suggested driving sources, two Class I sources with intermediate luminosities and one Class II source, are promising candidates of X-ray emitters. An optically thin hot plasma model with the two components can reproduce the GIS X-ray spectra extracted from circular regions including each of Class I sources. The hard X-ray components are probably from Class I sources and their intrinsic luminosities are > 1032 erg/s in the total energy band. Near infrared survey data revealed that they are surrounded by embedded young clusters. Therefore, the soft X-ray components could be explained by aggregates of low mass pre-main sequence stars.

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