X-RAY EMISSION FROM ACCRETING FU ORIONIS OBJECTS

FU Orionis objects (FUors) are a remarkable class of lowmass premainsequencestars that are undergoing disk accretion at very high rates. The classical FUorshave all experienced dramatic optical outbursts attributed to a sudden increasein the disk accretion rate. Because of their youth and strong accretionsignatures, FUors should be Xray sources. Surprisingly, Xray data for FUorsare almost nonexistent and little is known about their Xray attributes. Wepropose to observe three FUors with XMMEPIC in order to determine the basicXray properties of the class. Our targets include the prototype FU Orionis andthe classical FUor V1057 Cyg, which is known to have been a T Tauri star priorto its optical outburst in 1970. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]