An Amazingly Dusty Sun-like Star: Studying Cosmic Collisions at 1 AU

Details An Amazingly Dusty Sun-like Star: Studying Cosmic Collisions at 1 AU An Amazingly Dusty Sun-like Star: Studying Cosmic Collisions at 1 AU

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20227w&link_type=abstract

Spitzer Proposal ID #20227

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Scientific paper

We propose observations of an amazingly dusty Sun-like star of age a few hundred million years. The region in the vicinity of 1 AU from SAO 75016 is about one hundred thousand times dustier than the Zodiacal cloud of our solar system. The typical dust particle near HIP 8920 seems to be of micron size which is much smaller than typical Zodiacal dust particles. Survival times of these grains are only a few 1000 years, so this dust may be from frequent and/or huge collisions between asteroids or other ``planetesimals.'' HIP 8920 may be the extreme example of a small but growing number of very dusty, relatively old debris disks. We propose to study the composition and quantity of the dust around SAO 75016. We will determine whether this disk resembles the early Solar System during terrestrial planet formation. We will determine the mineralogical content and the radial distribution of its dust, including whether it also possesses Kuiper-belt region dust.

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