Coronal structure in the eclipsing binary, YY Gem

Details Coronal structure in the eclipsing binary, YY Gem Coronal structure in the eclipsing binary, YY Gem

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.1895h&link_type=abstract

Chandra Proposal ID #07200603

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Chandra Proposal Id #07200603

Scientific paper

We propose to determine the coronal structure and location of the X-ray emitting plasma in the active eclipsing binary YY Gem. YY Gem is unusual in that it appears to have surface spots at lower latitudes than other active rapidly rotating stars. We will observe YY Gem over two rotation cycles (141 ks) to study rotational modulation in the quiescent coronae of its component M stars as traced by centroid shifts and broadening in HETG line profiles. Velocity shifts in phase-binned spectra will be compared with YY Gem's orbital motion, determining the location and height of the emitting plasma. The comparison with simultaneous surface magnetic activity maps will be used to help us understand the relationship between coronal and surface magnetic structures in active stars.

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