ASpitzerSearch for Infrared Excesses around Massive Young White Dwarfs | Zendy

Brad M. S. Hansen | Zendy; Shri Kulkarni | Zendy; Sloane Wiktorowicz | Zendy

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ASpitzerSearch for Infrared Excesses around Massive Young White Dwarfs

Author(s) -

Brad M. S. Hansen,

Shri Kulkarni,

Sloane Wiktorowicz

Publication year - 2006

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/499207

Subject(s) - white dwarf , infrared , astrophysics , physics , astronomy , stars

We examine 14 hot white dwarfs for signs of infrared excess using the SpitzerSpace Telescope. Twelve of the objects are massive white dwarfs which have beensuggested to be the result of binary mergers. The remaining two objects areundermassive white dwarfs which again may be the result of mergers or theinspiral of a substellar companion. In no case do we find any evidence forsignificant infrared excesses out to wavelengths of 8 microns. This placesstrong constraints on the presence of orbiting dust and weaker constraints onthe presence of close substellar companions.Comment: 39 pages, 21 figures, 3 tables, 0 carbs. to appear in the Astronomical Journal (Feb 2006

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