GASEOUS MATERIAL ORBITING THE POLLUTED, DUSTY WHITE DWARF HE 1349–2305

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Melis, Carl; Dufour, P.; Farihi, J.; Bochanski, John J.; Burgasser, Adam J.; ... Show more
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Abstract
We present new spectroscopic observations of the polluted, dusty, helium-dominated atmosphere white dwarf star HE 1349–2305. Optical spectroscopy reveals weak Ca II infrared triplet emission indicating that metallic gas debris orbits and is accreted by the white dwarf. Atmospheric abundances are measured for magnesium and silicon while upper limits for iron and oxygen are derived from the available optical spectroscopy. HE 1349–2305 is the first gas disk-hosting white dwarf star identified among previously known polluted white dwarfs. Further characterization of the parent body polluting this star will require ultraviolet spectroscopy.
Date issued
2012-05
URI
http://hdl.handle.net/1721.1/95716
Department
MIT Kavli Institute for Astrophysics and Space Research
Journal
Astrophysical Journal
Publisher
Institute of Physics/American Astronomical Society
Citation
Melis, Carl, P. Dufour, J. Farihi, J. Bochanski, Adam J. Burgasser, S. G. Parsons, B. T. Gansicke, D. Koester, and Brandon J. Swift. “GASEOUS MATERIAL ORBITING THE POLLUTED, DUSTY WHITE DWARF HE 1349–2305.” The Astrophysical Journal 751, no. 1 (April 30, 2012): L4. © 2012 American Astronomical Society.
Version: Final published version
ISSN
2041-8205
2041-8213
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