Discovery of a hard X-ray flare from the Rho Ophiuchi dark cloud

Details Discovery of a hard X-ray flare from the Rho Ophiuchi dark cloud Discovery of a hard X-ray flare from the Rho Ophiuchi dark cloud

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l.255k&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 6, p. L255-L257.

Astronomy and Astrophysics

Astronomy

15

Dark Matter, Interstellar Matter, Ophiuchi Clouds, Pre-Main Sequence Stars, X Ray Spectra, Molecular Clouds, Star Formation, Stellar Flares

Scientific paper

Hard X-rays above 1.5 keV were observed from the central region of the Rho Ophiuchi dark cloud. The X-ray spectrum was fitted by a thin thermal model at a temperature of about 4 keV with the 1.5-10 keV band luminosity of 1.4 x 10 exp 32 erg/s. Iron K-shell emissions from highly ionized atoms were also observed. A flarelike event having a total luminosity of more than 10 exp 35 erg with a decay time of a few hours was discovered.

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