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Published April 1, 2007 | Published
Journal Article Open

Are Debris Disks and Massive Planets Correlated?


Using data from the Spitzer Space Telescope Legacy Science Program Formation and Evolution of Planetary Systems (FEPS), we have searched for debris disks around nine FGK stars (2-10 Gyr), known from radial velocity (RV) studies to have one or more massive planets. Only one of the sources, HD 38529, has excess emission above the stellar photosphere; at 70 μm the signal-to-noise ratio in the excess is 4.7, while at λ < 30 μm there is no evidence of excess. The remaining sources show no excesses at any Spitzer wavelengths. Applying survival tests to the FEPS sample and the results for the FGK survey recently published in Bryden et al., we do not find a significant correlation between the frequency and properties of debris disks and the presence of close-in planets. We discuss possible reasons for the lack of a correlation.

Additional Information

© 2007 The American Astronomical Society. Received 2006 November 2; accepted 2006 December 8. We thank the rest of the FEPS team members, colleagues at the Spitzer Science Center (in particular, Dave Frayer), and members of all the Spitzer instrument teams for advice and support. We thank G. Marcy, R. P. Butler, S. S. Vogt, and D. A. Fischer for their work with Keck HIRES and the anonymous referee for useful comments. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory (JPL), California Institute of Technology, under NASA contract 1407. A.M.-M. is under a contract with JPL funded by NASA through the Michelson Fellowship Program. A. M.-M. is also supported by the Lyman Spitzer Fellowship at Princeton University. M. R.M. and R. M. are supported in part through the LAPLACE node of the NASA Astrobiology Institute. R.M. also acknowledges support from the NASA Origins of Solar Systems research program. S.W. was supported through the DFG Emmy Noether grant WO 875/2-1 and WO875/2-2. FEPS is pleased to acknowledge support from NASA contracts 1224768 and 1224566 administered through JPL.

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