XMM-Newton Proposal 03020202

Details XMM-Newton Proposal 03020202 XMM-Newton Proposal 03020202

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop...67w&link_type=abstract

XMM-Newton Proposal ID #03020202

Physics

Stars, White Dwarfs, Solar System, J Pup, Theta Ara, Xmm-Newton Proposal 03020202

Scientific paper

The stellar winds of B supergiants (SGs) go through a discontinuous jump in their terminal velocities, mass loss rates, and X-ray emission at spectral type B1 which is referred to as the bistability of B SG winds. Since wind shocks produce the X-ray emission and are highly dependent on the stellar wind parameters, B SGs provide a natural laboratory to study the relationship between the radiative force, stellar wind, and X-ray emission. Although the drop in X-ray flux appears consistent with theoretical predictions, our AO-3 XMM observations of 2 B SGs at the jump indicate severe problems with current theory. We are requesting 2 additional EPIC observations of B SGs located near the bistability jump to determine the extent of these problems.

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