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We present Spitzer IRAC photometry of white dwarf remnants of 14 stars with M= 3-5 Msol. We do not detect mid-infrared excess around any of our targets. Bydemanding a 3 sigma photometric excess at 4.5 micron for unresolved companions,we rule out planetary mass companions down to 5, 7, or 10 M_J for 13 of ourtargets based on the Burrows et al. (2003) substellar cooling models. Combinedwith previous IRAC observations of white dwarf remnants of intermediate-massstars, we rule out \geq 10 M_J companions around 40 white dwarfs and \geq 5 M_Jcompanions around 10 white dwarfs.

Limits on Unresolved Planetary Companions to White Dwarf Remnants of 14 Intermediate-Mass Stars