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Kinematics of the SWEEPS transiting planet candidates

Published online by Cambridge University Press:  01 May 2008

Will Clarkson ,
Kailash Sahu ,
Jay Anderson ,
T. Ed Smith ,
Thomas M. Brown ,
Stefano Casertano ,
R Michael Rich ,
Howard E. Bond ,
Mario Livio  and
Dante Minniti
...Show all authors
Will Clarkson
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Kailash Sahu
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Jay Anderson
Affiliation:
Department of Physics and Astronomy, MS-108, Rice University, 6100 Main Street, Houston, TX-77005, USA
T. Ed Smith
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Thomas M. Brown
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Stefano Casertano
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
R Michael Rich
Affiliation:
UCLA, Los Angeles, California 90095-1562, USA
Howard E. Bond
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Mario Livio
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Dante Minniti
Affiliation:
Universidad Catolica de Chile, Av, Vicuna Mackenna 4680, Santiago 22, Chile
Nino Panagia
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Alvio Renzini
Affiliation:
INAF - Osservatorio di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Jeff Valenti
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA email clarkson@stsci.edu
Manuela Zoccali
Affiliation:
Universidad Catolica de Chile, Av, Vicuna Mackenna 4680, Santiago 22, Chile
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Abstract

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In 2004 a deep sequence of HST images of the Bulge was used to identify sixteen transiting extrasolar planet candidates (the SWEEPS candidates; Sahu et al. 2006), of which at least seven are likely to be true planets. Of these, SWEEPS-4 is almost certainly in the disk, and was shown through radial velocity followup to contain a planetary companion; the identification of the remaining fifteen candidates was left undetermined.

We have used a repeat visit in 2006 to attach proper motions to some 180,000 objects, including all sixteen SWEEPS candidates. This has allowed us to build a sample of bulge stars to unprecedented purity. A population of more than 13,000 bulge objects is kinematically isolated, with fewer than thirty disk contaminants. We use the mean bulge and disk populations to test the balance of kinematic associations for the sixteen SWEEPS candidates. Assuming both the detectability and the astrophysical false-positive fraction to be similar for disk and bulge, we find the fraction of stars with planets in the bulge to be consistent with that in the disk.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S253: Transiting Planets , May 2008 , pp. 512 - 515
Copyright
Copyright © International Astronomical Union 2009

References

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