NOAO >   Observing Info >   Approved Programs >   2003B-0170

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Proposal Information for 2003B-0170


PI: Charles Telesco, University of Florida, telesco@astro.ufl.edu
Address: Department of Astronomy, PO Box 112055, 211 Bryant Space Science Center,, Gainesville, FL, 32611-2055, USA

CoI: Naibi Marinas, University of Florida
CoI: Scott Fisher, Gemini Observatories
CoI: Tom Hayward, Gemini Observatories

Title: Mid-Infrared Imaging of Beta Pictoris

Abstract: We propose state-of-the-art, mid-IR imaging of the archetype circumstellar disk around the A5V star Beta Pictoris. We will use T- ReCS to image Beta Pic in the six narrow-band silicate filters near 10 microns, the broadband 10-micron filter, and at 20 microns. With the silicate filters, we can separate the feature and continuum emission throughout the disk, and determine the shape of the silicate feature, exploring the distribution of the silicate mineralogy radially and vertically in the disk. With the 20-micron images and those in the out- of-feature narrowband silicate filters, we can obtain accurate dust temperatures and optical depths, which will define the density structure throughout the inner disk, particularly the clumps. That analysis will permit the first determination of the geometry of the central hole, purportedly cleared by planets. The deep 10-micron image will explore the morphology where the inner disk merges with the outer disk, which is oriented at a different PA than the inner disk. That transition region holds important clues to the dynamics relating a tilted disk to a perturbing planet.


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