XMM-Newton Proposal 02009601

Details XMM-Newton Proposal 02009601 XMM-Newton Proposal 02009601

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...49w&link_type=abstract

XMM-Newton Proposal ID #02009601

Astronomy and Astrophysics

Astrophysics

Xy Uma, Xmm-Newton Proposal 02009601

Scientific paper

Observations in the temporal domain open up new windows on astrophysics that snapshot observations simply cannot address. We propose an eclipse timing and rotational modulation observation of the RS CVn system XY UMa to further our investigations of the morphologies of active stellar atmospheres. Earlier eclipse mapping observations have given contradictory results: sometimes the coronae appear compact (solar-like), at other times they appear extended. Uninterrupted observations longer than the stellar rotation period are needed to ensure a view of the quiescent corona amidst the frequent flaring. Observations spanning 3 stellar orbits will reveal the coronal scale heights, latitudes, and spatial scales down to 100,000 km, or about 5% of the stellar radius.

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