AXAF Grating Spectroscopy of Active Single Stars

Details AXAF Grating Spectroscopy of Active Single Stars AXAF Grating Spectroscopy of Active Single Stars

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..216l&link_type=abstract

Chandra Proposal ID #01200034

Physics

Chandra Proposal Id #01200034

Scientific paper

We propose to observe two active late-type single dwarfs with the AXAF HETGS. AB Dor is a Pleiades-age K2 V rapid rotator at a distance of 15 pc. AB Dor exhibits large-amplitude long-duration flares and rotationally modulated activity at many wavelengths. The HETGS observation of AB Dor will span an entire 0.51-d rotational period. AU Mic is a very active M1 V flare star at a distance of 10 pc. AB Dor and AU Mic are prototypes for extreme main-sequence magnetic activity. The principal objectives of the HETGS observations are (i) to obtain time-resolved X-ray spectra of flares and (ii) to obtain high signal-to-noise, high-resolution spectra of very hot coronal sources to test optically thin collisional ionization equilibrium plasma codes. Supporting ground-based observations are planned.

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