NOAO >   Observing Info >   Approved Programs >   2009A-0417

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Proposal Information for 2009A-0417


PI: Rachel Stevenson, University of Hawaii, rach@ifa.hawaii.edu
Address: Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, USA

CoI: David Jewitt, University of Hawaii

Title: Hydrated Hildas - The Search for Liquid Water in the Early Solar System

Abstract: The Hilda asteroids are in a 2:3 orbital resonance with Jupiter and lie between the well-studied main belt asteroids and the ice-deficient Jovian Trojans. It is known that many asteroids in the main belt have hydrated minerals on their surfaces. This confirms that these asteroids once had significant ice deposits that later melted and chemically altered the surrounding minerals. The distribution of the hydrated asteroids can be used to constrain the range over which ice was able to form and subsequently melt. Hydrated asteroids have been observed in the main belt but little is known about the extent of hydration amongst the Hilda asteroids - a group of objects that is likely to have also undergone aqueous alteration. Using optical spectra of the Hilda asteroids we will examine the extent of hydration in the mid-Solar System and the implications for heating in the early Solar nebula.


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NOAO >   Observing Info >   Approved Programs >   2009A-0417

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