Unusual X-ray Emission from the Rapidly Accreting Young Star FU Orionis

Physics

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Scientific paper

FU Orionis objects are a class of very young low-mass stars that have undergone dramatic optical outbursts attributed to an increase in the disk accretion rate onto the star. The intense energy release from these outbursts will vaporize solid material in the terrestrial planet zone and may thus profoundly influence planet formation. We propose to observe the prototype of the class, FU Ori, with ACIS. It is rapidly accreting, has a powerful wind, and is known to have an unusual double absorption X-ray spectrum from a previous XMM observation. Chandra will provide the higher spatial resolution image and improved CCD spectrum needed to clarify the source morphology and origin of the unusual X-ray emission.

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