Probing the Mystery of 1 keV Emission from Single Hot White Dwarfs

Details Probing the Mystery of 1 keV Emission from Single Hot White Dwarfs Probing the Mystery of 1 keV Emission from Single Hot White Dwarfs

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop...43c&link_type=abstract

XMM-Newton Proposal ID #04011201

Computer Science

Stars, White Dwarfs, Solar System, Kpd 0005+5106, Xmm-Newton Proposal 04011201

Scientific paper

Single hot white dwarfs (WDs) should exhibit no detectable emission at energies above 0.25 keV. We have discovered two single hot WDs, KPD0005+5106 and PG1159, that defy this paradigm and show 1 keV emission in ROSAT archival data. Optical, IR and X-ray data rule out plausible late-type companions or coincident background AGN as the culprits. We request XMM-Newton observations of KPD0005+5106 and PG1159 to obtain their X-ray spectral energy distribution and temporal behavior in order to determine the origin of their 1 keV emission and to constrain models of their stellar atmospheres.

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