A Warm Circumstellar Disk Polluting the Helium-Rich Atmosphere White Dwarf GD 16

Details A Warm Circumstellar Disk Polluting the Helium-Rich Atmosphere White Dwarf GD 16 A Warm Circumstellar Disk Polluting the Helium-Rich Atmosphere White Dwarf GD 16

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5020f&link_type=abstract

American Astronomical Society, AAS Meeting #211, #50.20; Bulletin of the American Astronomical Society, Vol. 39, p.814

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We will present near- and mid-infrared photometric data on the white dwarf GD 16 indicating the presence of a warm circumstellar dust disk. This helium-rich degenerate shares many characteristics with the spectacularly metal-rich GD 362, including substantial amounts of Ca, Mg, and Fe. These atmospheric metals are external pollutants accreted from the circumstellar material, and can inform on the composition of extrasolar planetesimals which have survived post-main sequence evolution.

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