Chandra HETG Spectroscopy of GK Per in Outburst

Details Chandra HETG Spectroscopy of GK Per in Outburst Chandra HETG Spectroscopy of GK Per in Outburst

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop.1054m&link_type=abstract

Chandra Proposal ID #03308083

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Chandra Proposal Id #03308083

Scientific paper

GK Persei is an extraordinary object: the first nova of the last century, it contains a magnetic white dwarf, an evolved secondary, and a large truncated accretion disk. ASCA demonstrated that in outburst the X-ray spectrum of GK Per contains strong Fe K emission lines and a strong low-energy (0.5-3 keV) excess. The nature of the low-energy excess is not known, but it is expected to consist of a mixture of thermal emission lines from the accretion column and fluorescent emission lines from the white dwarf surface and accretion disk. We propose to obtain two Chandra HETG observations of GK Per in outburst to determine the nature of the low-energy emission, measure the Fe K emission line strengths, and search for other emission lines, thereby constraining the accretion geometry and the plasma conditions (range of temperatures, abundances, and density) of the X-ray--emitting plasma.

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