AXAF Grating Spectroscopy of Active Binaries

Details AXAF Grating Spectroscopy of Active Binaries AXAF Grating Spectroscopy of Active Binaries

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..215l&link_type=abstract

Chandra Proposal ID #01200032

Physics

Chandra Proposal Id #01200032

Scientific paper

We propose to observe two active binaries with the AXAF HETGS and LETGS. TZ CrB is a G0 V + G0 V RS CVn binary. The HETGS observation will span an entire 1.14-d orbital period and will probably include one large flare. The HETGS line profiles may reveal high-velocity material ejected at the onset of a flare. Density and temperature-sensitive line ratios obtained at different orbital phases will be used to map the coronal geometry of TZ CrB. 44 Boo is an eclipsing, W UMa-type contact binary. The LETGS observation of 44 Boo will span no less than two 0.27-d orbital periods and will be used to perform coronal eclipse mapping and to investigate flares. Moreover, 44 Boo's maximum radial velocity separation of 230 km/s should be resolved in the longer wavelength LETG line profiles.

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