Spitzer White Dwarf Planet Limits

Details Spitzer White Dwarf Planet Limits Spitzer White Dwarf Planet Limits

2006-10-28

arxiv.org/abs/astro-ph/0610856v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, to appear in Proceedings of 15th European White Dwarf Workshop

Scientific paper

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.

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