Chandra Hetgs Observations of the Rapidly Rotating OE Star Zeta OPH

Details Chandra Hetgs Observations of the Rapidly Rotating OE Star Zeta OPH Chandra Hetgs Observations of the Rapidly Rotating OE Star Zeta OPH

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..773w&link_type=abstract

Chandra Proposal ID #03200704

Physics

Chandra Proposal Id #03200704

Scientific paper

We propose a 92 ks Chandra HETG observation of the O 9.5V(e) star Zeta Oph. Several very interesting results have emerged from HETG observations of O stars, e.g., not only are the X-rays distributed throughout the stellar wind, we also find X-ray emission from high ion stages (S XV and Si XIII) at the base of the wind. These results were determined from O stars with moderately thick winds. To probe near surface X-ray emission characteristics we need high resolution spectra of an O star in an optically thin environment. Zeta Oph is the ideal target. It is a well know X-ray source, relatively bright in X-rays, has an optically thin windto all HETG X-rays, and is one of the most rapidly rotating O stars, showing Be characteristics, which by itself makes it a very interesting target.

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