Pre-planned ToO of a pre-main sequence star undergoing an optical-IR outburst

Details Pre-planned ToO of a pre-main sequence star undergoing an optical-IR outburst Pre-planned ToO of a pre-main sequence star undergoing an optical-IR outburst

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop...52g&link_type=abstract

XMM-Newton Proposal ID #05516401

Physics

Stars, White Dwarfs, Solar System, Pms Star In Out, Xmm-Newton Proposal Id #05516401

Scientific paper

Dramatic optical/IR outbursts from PMS stars, which signal the onset of rapid mass-infall onto such stars through their accretion disks, cannot be predicted. However, our Chandra and XMM monitoring of the outburst of V1647 Ori demonstrates that an high accretion rate can also produce an X-ray outburst, and, indeed, that X-ray monitoring of PMS accretion bursts represents a new observational window on the magnetic interaction between the stellar magnetosphere and the accretion disk. We have been allocated Chandra ToO time to monitor with snapshots, beginning just after discovery, any such outbursts during Cycle 9. We propose an 120 ks-exposure XMM ToO of any X-ray outburst confirmed with Chandra to perform X-ray spectroscopy with EPIC and to investigate X-ray variability on a timescale of a day.

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