XMM-Newton Proposal 02013601

Details XMM-Newton Proposal 02013601 XMM-Newton Proposal 02013601

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...75d&link_type=abstract

XMM-Newton Proposal ID #02013601

Computer Science

56 Tau, Xmm-Newton Proposal 02013601

Scientific paper

We propose to observe 2 magnetic early-type stars (56 Tau and nu Sco CD) that were previously detected as X-ray sources by ROSAT and as nonthermal radio sources by the VLA, so as to obtain well-exposed EPIC spectra and lightcurves. We will analyze their spectra for evidence for or against the hypothesis that the X-ray emitting plasma is intrinsic to the magnetic star (as opposed to being coronal emission from unresolved low-mass stellar companions), e.g., by comparing the inferred coronal elemental abundances to the peculiar Si-rich abundances of the magnetic stars' photospheres. We will also study the X-ray lightcurves of the 2 stars compared to their magnetic field variations and to their simultaneous radio light curves as a further test of the intrinsic vs. extrinsic hypothesis.

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