Date: Wed, 12-Aug-2009
Time: 1:00-2:00pm
Location: CSS 2316
Speaker: Dr. Lucas Paganini (Max Planck Institute)
Title: Sub-millimeter investigation of the cometary coma using a Monte Carlo model
Abstract: Considered to be unmodified since the formation of the solar system, comets are perfect witnesses of the solar system formation and thus enable us to trace the physical, thermochemical and dynamical conditions of the regions in the solar nebula where cometary material was formed. As a comet approaches the Sun the bulk composition of cometary nuclei can be analyzed by (sub)millimeter spectroscopy. In contrast to shorter wavelengths observations, the analysis of cometary comae by means of this method allows to monitor parent molecules with high spectral resolution. Clearly, a correct interpretation of line intensities and production rates of parent molecules, throughout the whole cometary coma, requires the inclusion of all excitation parameters and radiative transfer in the optical thick case. The ultimate aim of this talk is to present a numerical code which allows the simulation of water molecules in cometary comae and hence facilitates the understanding of the physical conditions observed.
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.
