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N. S. Brickhouse, A. K. Dupree, P. R. Young (CfA)
Chandra HETG observations of the bright eclipsing contact binary 44 Boo show X-ray line profiles which are Doppler-shifted by orbital motions. The observation continuously covers 2.56 epochs. Although significant variability is found in the light curve, no clear eclipses are observed. The phase-binned line profiles, in conjunction with the X-ray light curve, constrain the coronal structures to be localized at high latitude.
These observations demonstrate the power of the X-ray Doppler imaging technique. Studies of other contact binaries, and studies of RS CVn systems with future X-ray spectrometers are discussed.
The author(s) of this abstract have provided an email address for comments about the abstract: nbrickhouse@cfa.harvard.edu