Spitzer White Dwarf Planet Limits
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We present preliminary limits on the presence of planets around white dwarf stars using the IRAC photometer on the Spitzer space telescope. Planets emit strongly in the mid-infrared which allows their presence to be detected as an excess at these wavelengths. We place limits of $5 M_J$ for 8 stars assuming ages of $1 Gyr$, and $10 M_J$ for 23 stars.We describe our survey, present our results and comment on approaches to improve our methodology.
4 pages, 3 figures, to appear in Proceedings of 15th European White Dwarf Workshop
4 pages, 3 figures, to appear in Proceedings of 15th European White Dwarf Workshop