Discovery of X-ray emission from a class 0 protostar

Details Discovery of X-ray emission from a class 0 protostar Discovery of X-ray emission from a class 0 protostar

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005asthe..98..790h&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 98, No. 12, p. 790 - 798 (2005)

Astronomy and Astrophysics

Astronomy

Protostars, X Rays

Scientific paper

With two XMM-Newton observations on March 2003, we detected for the first time strong X-ray emission from an extremely embedded source in the R Coronae Australis star forming core. The source, identified as IRS7B, has the characteristics of a star in its youngest phase, i.e. a Class 0 protostar: strong X-ray absorption of NH~3e23 cm-2 equivalent to the visual extinction of ~180 mag; extremely weak emission in the near infrared (K>19 mag) but strong emission at submillimeter wavelengths. X-rays are emitted from very hot plasma at a temperature ~4×107K. Such high energy emission may be produced by magnetic activity in the process of mass accretion onto the protostellar core.

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