NOAO >   Observing Info >   Approved Programs >   2012B-0541

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Proposal Information for 2012B-0541


PI: Rahul I. Patel, Stony Brook Univeristy, rahul.patel.1@stonybrook.edu
Address: Physics Department, 295 Sheep Pasture Rd, East Setauket, NY 11733, USA

CoI: Stanimir Metchev, Stony Brook University

Title: Age Diagnostics of New WISE Detected Debris Disk-Host Stars

Abstract: We propose to obtain R=40,000 echelle spectroscopy with the Mayall and the AAT of a sample of newly identified debris disk-host stars from the WISE Preliminary Data Release. The sample was selected by cross- correlating all unsaturated WISE sources with the Hipparcos catalogue, and selecting only (pre-)main-sequence stars with W3 (12 \micron) or W4 (22 \micron) excesses within 150pc. These stars are already the subject of several intensive high-contrast imaging programs to resolve the debris disks, and to image new extrasolar planets. Our echelle data will elucidate crucial stellar characteristics, such as age and binarity, necessary for the interpretation of the evolutionary stage of the circumstellar dust and of any detected exoplanets. Our spectra will also reveal trace amounts of circumstellar gas around any of the B and A stars with near edge-on disks, and so determine the availability of remnant material for giant planet formation. Of the 275 stars in our sample, 192 are observable in 2012B. We will propose for the remainder, plus any additional disk hosts discovered in the WISE All-Sky Data Release, in 2013A.


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