Mukremin Kilic et al. 2009 ApJ 705 1219 doi:10.1088/0004-637X/705/2/1219
Mukremin Kilic1,4, Andrew Gould2 and Detlev Koester3
Show affiliationsWe present Spitzer IRAC photometry of white dwarf remnants of 14 stars with M = 3-5 M ☉. We do not detect mid-infrared excess around any of our targets. By demanding a 3σ photometric excess at 4.5 μm for unresolved companions, we rule out planetary mass companions down to 5, 7, or 10 M J for 13 of our targets based on the Burrows et al. substellar cooling models. Combined with previous IRAC observations of white dwarf remnants of intermediate-mass stars, we rule out ≥10M J companions around 40 white dwarfs and ≥5M J companions around 10 white dwarfs.
infrared: stars; planetary systems; stars: low-mass, brown dwarfs; white dwarfs
Issue 2 (2009 November 10)
Received 2009 May 14, accepted for publication 2009 September 10
Published 2009 October 20
Mukremin Kilic et al. 2009 ApJ 705 1219
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