Is the Hot do White Dwarf KPD0005+5106 Really a Coronal X-Ray Source?

Details Is the Hot do White Dwarf KPD0005+5106 Really a Coronal X-Ray Source? Is the Hot do White Dwarf KPD0005+5106 Really a Coronal X-Ray Source?

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..443m&link_type=abstract

Chandra Proposal ID #02200099

Physics

Chandra Proposal Id #02200099

Scientific paper

We will observe the hot DO white dwarf KPD0005+5106 with the Chandra LETG to conclusively show whether or not the X-ray emission arises from a coronal plasma. If the emission is merely photospheric, then the spectrum will form a continuum possibly including absorption features from heavy elements in the atmosphere. In contrast, a coronal plasma will generate an emission line spectrum. If this hypothesis is finally prove, this white dwarf will be completely unique as the only coronal degenerate star detected in the soft X-ray band. Such a source probably arises from a hot wind, or interaction of a wind with surrounding circumstellar material. A detailed analysis of the line emission will reveal the physical conditions within the plasma and allow examination of alternative models.

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