X-ray Investigation of Origins of Dust Disks around Hot White Dwarfs

Details X-ray Investigation of Origins of Dust Disks around Hot White Dwarfs X-ray Investigation of Origins of Dust Disks around Hot White Dwarfs

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..178c&link_type=abstract

XMM-Newton Proposal ID #05558802

Computer Science

Stars, White Dwarfs, Solar System, Wd 0127+581, Cspn K1-22, Xmm-Newton Proposal Id #05558802

Scientific paper

The Helix Nebula's central star, a hot white dwarf (WD), exhibits hard X-rays and strong mid-IR emission that are not expected from its photosphere. An external cause is required, but no direct evidence for a binary companion exists at optical and near-IR wavelengths. It is not clear whether the hard X-ray and mid-IR emissions are related. From our Spitzer Space Telescope 24 micron survey of hot WDs, we found excess mid-IR emission from WD 0127+581 in the planetary nebula (PN) Sh2-188 and the central star of PN K1-22. We request XMM-Newton observations of these two WDs to establish the relationship between hard X-ray emission and mid-IR excess, and to determine whether they are associated with Kuiper Belt-like objects or common-envelope binary evolution.

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