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Paper: Intense X-Ray emission from an Embedded Infrared Protostar in the rho Ophiuchi Cloud
Volume: 132, Star Formation with the Infrared Space Observatory (ISO)
Page: 354
Authors: Grosso, N.; Montmerle, T.; Andre, P.; Casanova, S.; Feigelson, E. D.; Gregorio-Hetem, J.
Abstract: We report X-ray observations with the ROSAT High Resolution Imager (HRI) of one of the nearest star-forming regions -- the rho Ophiuchi cloud -- that clearly show an intense X-ray flare associated with a deeply embedded protostar. The peak X-ray luminosity, after correcting for extinction, is greater than or equal to 10--100 times the Sun's bolometric luminosity, and equals or exceeds the bolometric luminosity of the forming star. Taken together, the evidence suggests that the X-rays are not created by the type of magnetic activity seen on the Sun or on other young low-mass stars, but rather are associated with processes in the circumstellar accretion disk, or within the envelope.
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