NOAO > Observing Info > Approved Programs > 2011A-0571
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NOAO > Observing Info > Approved Programs > 2011A-0571 |
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PI: Kate Su, University of Arizona (Astronomy), ksu@as.arizona.edu
Address: Department of Astronomy and Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA
CoI: Vanessa Bailey, University of Arizona (Astronomy)
CoI: Phil Hinz, University of Arizona (Astronomy)
CoI: Laird Close, University of Arizona (Astronomy)
CoI: George Rieke, University of Arizona (Astronomy)
Title: A search for the perturbing planets in large hole debris disks
Abstract:
How common is it for exoplanetary systems to have massive planets at large
radial distances? Direct imaging is the best way to answer this question, and
several such systems have been discovered this way. Previous direct imaging
surveys of late-type stars selected by age and proximity have yielded null
results. We propose to study three nearby F stars of age 1Gyr or less, whose
IR SEDs have excesses indicative of partially cleared debris disks. HR8799
and Fomalhaut (and our own solar system) have two component disks/belts
partially cleared by companions, making systems with similar disk structure
attractive targets for planet finding. Our target disks have sharp inner
edges beginning between 40AU and 70AU, and in two cases there are indications
of an additional inner disk. Using NICI's coronagraphic imager in H band, we
propose to observe these systems to reach limiting magnitudes equivalent to
between 5 and 10 Jupiter masses. A detection will further substantiate sharp
disk gaps as an observational indicator of such unusual wide separation
systems.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2011A-0571 |
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