NOAO >   Observing Info >   Approved Programs >   2011A-0571

Small NOAO Logo

Proposal Information for 2011A-0571


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



NOAO >   Observing Info >   Approved Programs >   2011A-0571

noaoprop-help@noao.edu

Small NOAO Logo