The Spitzer Space Telescope has made it possible to obtain mid-infrared spectra of a large sample of mass-losing evolved stars in the Large and Small Magellanic Clouds. Comparison to spectra of galactic sources obtained with the Infrared Astronomical Satellite (IRAS) and the Infrared Space Observatory (ISO) reveals that the composition and amount of dust produced depends on the metallicity of the star. Evolved stars are the primary source of dust in a typical galaxy, and these studies are a first step in understanding how the material injected the interstellar medium can vary with the metallicity of the galaxy.
Thursday, September 22nd
Seminar is to be held from 2 PM in the conference room
on the second floor of Dearborn Observatory
Refreshments will be served at 1:30 PM
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