X-rays from FU Orionis Stars

Details X-rays from FU Orionis Stars X-rays from FU Orionis Stars

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop...90s&link_type=abstract

XMM-Newton Proposal ID #05024201

Physics

Stars, White Dwarfs, Solar System, V1331 Cyg, Xmm-Newton Proposal 05024201

Scientific paper

FU Orionis objects (FUors) are a remarkable class of low-mass pre-main-sequence stars that undergo dramatic optical outbursts attributed to an increase of the accretion rate onto the star. Little is known about their X-ray properties but we have recently obtained first detections of unusual X-ray emission from the prototype FU Ori and hard X-rays from the FUor 1735 Cyg. We propose here to observe five additional FUors with EPIC, of which two are classical FUors with historical outbursts (V346 Nor, Reipurt50N) and three are spectroscopic FUors which may be outburst precursors. These observations will double the number of FUors observed in X-rays and provide a larger sample needed to reliably determine the X-ray properties of the class and identify emission mechanisms.

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