NOAO >   Observing Info >   Approved Programs >   2012B-0224

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Proposal Information for 2012B-0224


PI: Joseph P. Chatelain, Georgia State University, chatelain@chara.gsu.edu
Address: Physics Department, Sci. Annex, Suite 400, 29 Peachtree Center Ave., Atlanta, GA 30303, USA

CoI: Todd J. Henry, Georgia State University
CoI: Nicholas J. Scott, Georgia State University
CoI: Linda M. French, Illinois Wesleyan University
CoI: Robert D. Stephens, GMARS

Title: Light Curves and Low Phase Angle Photometry for Jupiter Trojans.

Abstract: We propose to make light curve observations in both the V and I filters as well as phase curve observations of the 26 brightest Jupiter Trojans, evenly selected from the L4 (Greek) and L5 (Trojan) Lagrangian camps. We are observing these objects as part of a comprehensive effort including 113 Greeks and Trojans using the CTIO 1.0m. With these light curve data we will update previously calculated variation amplitudes and look for color variations that can give details about shapes, orientations, surface features, and ages. None of these targets have published simultaneous color information. The phase information can provide insight into surface detail and composition. These data will also enable calibration of our ongoing photometry program that will reveal the possible origins of the two camps, which remain surprisingly obscure. Furthermore, the light curves are necessary to produce proper phase curves by allowing for the removal of any changes in brightness due to rotation. \emphThe proposed observations will comprise a significant portion of the PI's PhD thesis.


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 >   2012B-0224

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