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On the Relationship Between Debris Disks and Planets

Kóspál, Ágnes and Ardila, David R. and Moór, Attila and Ábrahám, Péter (2009) On the Relationship Between Debris Disks and Planets. Astrophysical Journal Letters, 700 (2). L73-L77. ISSN 2041-8205. doi:10.1088/0004-637X/700/2/L73.

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Dust in debris disks is generated by collisions among planetesimals. The existence of these planetesimals is a consequence of the planet formation process, but the relationship between debris disks and planets has not been clearly established. Here we analyze Spitzer/MIPS 24 and 70 μm data for 150 planet-bearing stars, and compare the incidence of debris disks around these stars with a sample of 118 stars around which planets have been searched for, but not found. Together they comprise the largest sample ever assembled to deal with this question. The use of survival analysis techniques allows us to account for the large number of nondetections at 70 μm. We discovered 10 new debris disks around stars with planets and one around a star without known planets. We found that the incidence of debris disks is marginally higher among stars with planets, than among those without, and that the brightness of the average debris disk is not significantly different in the two samples. We conclude that the presence of a planet that has been detected via current radial velocity techniques is not a good predictor of the presence of a debris disk detected at infrared wavelengths.

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Additional Information:© 2009 The American Astronomical Society. Received 2009 March 27; accepted 2009 June 19; published 2009 July 10. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. A .K. acknowledges support from the Spitzer Visiting Graduate Student Fellowship and from the Netherlands Organization for Scientific Research (NWO). The authors thank L. Balazs for useful discussions about statistics and the referee for his/her comments. This work was partly supported by the Hungarian Research Fund OTKA K62304. Facilities: Spitzer.
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Netherlands Organization for Scientific Research (NWO)UNSPECIFIED
Hungarian Research FundOTKA K62304
Subject Keywords:circumstellar matter; infrared: stars; Kuiper Belt; planetary systems
Issue or Number:2
Record Number:CaltechAUTHORS:20090910-140315653
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Official Citation:On the Relationship Between Debris Disks and Planets Ágnes Kóspál, David R. Ardila, Attila Moór, and Péter Ábrahám 2009 ApJ 700 L73-L77 doi: 10.1088/0004-637X/700/2/L73.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:15739
Deposited By: Tony Diaz
Deposited On:15 Sep 2009 17:28
Last Modified:08 Nov 2021 23:21

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