NOAO >   Observing Info >   Approved Programs >   2016A-0302

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Program Information for 2016A-0302


PI: Linda French, Illinois Wesleyan U., lfrench@iwu.edu
Address: Physics Department, P.O. Box 2900, Bloomington, IL 61702 USA

CoI: R D Stephens, GMARS Center for Solar System Studies
CoI: David James, CTIO

Title: In Search of the Trojan Spin Barrier

Abstract: Many lines of research suggest that the jovian Trojan asteroids may have formed in the outer solar system and may be related to comets. Rotation studies have given valuable information about the processes affecting Main Belt Asteroids (MBAs) of different sizes. We propose to obtain rotation periods of $sim$ 150 Trojans from 5-20 km in diameter in order to learn whether collisions have dominated their evolution or whether other processes such as YORP may have been important. MBAs smaller than D $sim$ 10 km show a "spin barrier" of about 2.2 hours. The discovery of such a barrier for jovian Trojans would place limits on their average density, helping us to determine whether they are more asteroid-like or comet-like. This project makes use of the unique capabilities of the Blanco's 4 meter aperture and the wide field of view of DECam.

Program Type: Standard/Solar System

Scheduled Nights:
Run 1 (2016A):  CT-4m/DECam -- 5n on Apr 23 - Apr 27 2016


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NOAO >   Observing Info >   Approved Programs >   2016A-0302

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