Date: Thu, 13-Aug-2009
Time: 12:30-1:30pm
Location: CSS 2316
Speaker: Alan Gersch (UMD)
Title: Modeling Spectra of Cometary Comae Including Optical Depth Effects
Abstract: Comets are thought to be frozen remnants from the formation of our solar system. As such, their chemical composition is of great significance to understanding the origin of the planets and the distribution of important molecules, including water, throughout the solar system. This was and is a major goal of the Deep Impact (DI) Mission. The goal of this thesis research is to better understand the abundances, distributions and creation mechanisms of various gases observed by DI in the coma of comet Tempel 1, the target of the DI Mission. In order to do so, we have built a computer model of the spectra of the comet's coma that includes the difficult and often ignored problem of accurately modeling radiative transfer. This model can deal with the possibility of an optically thick coma. This model will facilitate analyzing the actual spectral data from the Deep Impact mission to better determine abundances of key species, including CO, CO2 and H2O.
For further information please contact PALS coordinator Dr. Jian-Yang Li at jyli@astro.umd.edu, 301-405-2103.
SPECIAL ACCOMMODATIONS:
Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.
