X-ray Imaging of McNeil's Star: Witnessing the Onset of an Accretion Burst

Details X-ray Imaging of McNeil's Star: Witnessing the Onset of an Accretion Burst X-ray Imaging of McNeil's Star: Witnessing the Onset of an Accretion Burst

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1635k&link_type=abstract

Chandra Proposal ID #06200093

Physics

Chandra Proposal Id #06200093

Scientific paper

It is widely accepted that most if not all Sunlike stars experience one or more FU Ori (FUor) phases - episodes of exceedingly high accretion rate - during their pre-main-sequence evolution. However, no FUor has yet been studied during outburst onset. We propose to monitor the X-ray luminosity and spectral distribution of McNeil's Star, a candidate FUor recently (Jan. 2004) caught during its rise phase. As McNeil's Star was serendipitously detected as a weak X-ray source by CXO prior to outburst, the proposed monitoring campaign will constitute a unique test of the hypothesis that accretion processes are responsible for X-ray emission from pre-MS stars. This opportunity is unlikely to repeated during Chandra's lifetime.

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