Detection of the First Coronal X-ray Source about a White Dwarf

Details Detection of the First Coronal X-ray Source about a White Dwarf Detection of the First Coronal X-ray Source about a White Dwarf

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.4704f&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #47.04; Bulletin of the American Astronomical Society, Vol. 25, p.878

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a ROSAT PSPC observation of the hot DO white dwarf KPD 0005+5106 which indicates that the X-radiation is coming from a hot corona about the star. This is quite novel, since all previously observed X-ray emission from white dwarfs has been photospheric in nature. The corona about KPD 0005+5106 appears to be cooler (6 times 10(5) K) than typical main sequence-star coronae and is probably heated by a wind, analogous to O and B-star X-ray emission. This interpretation is consistent with recent HST observations and the discovery of O VIII emission lines in the spectrum of KPD 0005+5106.

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