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Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks

Merín, Bruno and Ardila, David R. and Ribas, Álvaro and Bouy, Hervé and Bryden, Geoffrey and Stapelfeldt, Karl and Padgett, Deborah (2014) Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks. Astronomy and Astrophysics, 569 . Art. No. A89. ISSN 0004-6361. doi:10.1051/0004-6361/201322956.

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Dust in debris disks is produced by colliding or evaporating planetesimals, which are remnants of the planet formation process. Warm dust disks, known by their emission at ≤24 μm, are rare (4% of FGK main sequence stars) and especially interesting because they trace material in the region likely to host terrestrial planets, where the dust has a very short dynamical lifetime. Statistical analyses of the source counts of excesses as found with the mid-IR Wide Field Infrared Survey Explorer (WISE) suggest that warm-dust candidates found for the Kepler transiting-planet host-star candidates can be explained by extragalactic or galactic background emission aligned by chance with the target stars. These statistical analyses do not exclude the possibility that a given WISE excess could be due to a transient dust population associated with the target. Here we report Herschel/PACS 100 and 160 micron follow-up observations of a sample of Kepler and non-Kepler transiting-planet candidates’ host stars, with candidate WISE warm debris disks, aimed at detecting a possible cold debris disk in any one of them. No clear detections were found in any one of the objects at either wavelength. Our upper limits confirm that most objects in the sample do not have a massive debris disk like that in β Pic. We also show that the planet-hosting star WASP-33 does not have a debris disk comparable to the one around η Crv. Although the data cannot be used to rule out rare warm disks around the Kepler planet-hosting candidates, the lack of detections and the characteristics of neighboring emission found at far-IR wavelengths support an earlier result suggesting that most of the WISE-selected IR excesses around Kepler candidate host stars are likely due to either chance alignment with background IR-bright galaxies and/or to interstellar emission.

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URLURL TypeDescription Paper DOIArticle
Stapelfeldt, Karl0000-0002-2805-7338
Padgett, Deborah0000-0001-5334-5107
Additional Information:© 2014 ESO. Article published by EDP Sciences. Received 31 October 2013; Accepted 2 August 2014. Published online 29 September 2014. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. This work has been possible thanks to the support from the ESAC Trainee Program, ESAC Space Science Faculty, and of the Herschel Science Centre. AR acknowledges support from the ESA SRE-OA Research Funding via contract SC 1300016149. Support for this work was provided by NASA through an award issued by JPL/Caltech. This publication is based on observations made by the Herschel Space Telescope and the PACS instrument. PACS was developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KU Leuven, CSL, IMEC (Belgium); CEA, LAM (France); MPIA (Germany); INAF-IFSI, OAA, OAP, OAT, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI, INAF (Italy), and CICYT/MCYT (Spain). HCSS, HSpot and HIPE are joint developments by the Herschel Science Ground Segment Consortium, consisting of ESA, the NASA Herschel Science Center, and the HIFI, PACS and SPIRE consortia. This publication is also based on observations made with the Kepler Spacecraft. Funding for this mission is provided by National Aeronautics and Space Administration’s Science Mission Directorate (NASA). This study also makes use of data products from Herschel Space Observatory and the Wide-field Infrared Survey Explorer, a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory (JPL)/California Institute of Technology (Caltech); the NASA Infrared Processing and Analysis Center (IPAC) Science Archive and the NASA/IPAC/NExScI Star and Exoplanet Database, operated by JPL, Caltech, and funded by NASA; the SIMBAD database and the Vizier service, operated at the Centre de Donnes astronomiques de Strasbourg, France; the data products from the Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and IPAC at Caltech, funded by NASA and the National Science Foundation; the Multimission Archive at the Space Telescope Science Institute (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts.
Funding AgencyGrant Number
ESAC Space Science FacultyUNSPECIFIED
Herschel Science CentreUNSPECIFIED
European Space Agency (ESA)SC 1300016149
Subject Keywords:planetary systems – planets and satellites: dynamical evolution and stability
Record Number:CaltechAUTHORS:20141121-082338615
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Official Citation:Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks Bruno Merín, David R. Ardila, Álvaro Ribas, Hervé Bouy, Geoffrey Bryden, Karl Stapelfeldt, Deborah Padgett A&A 569 A89 (2014) DOI: 10.1051/0004-6361/201322956
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52027
Deposited By: Tony Diaz
Deposited On:21 Nov 2014 17:33
Last Modified:10 Nov 2021 19:19

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