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Center for Astrophysics Research and Technologies Seminar Series Information


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Infrared Properties of Stars in the Bulge Asymmetries and Dynamical Evolution Survey

Thursday April 12, 2018
2:00 pm

 Presenter:  Eddie Hilburn, III
 Series:  Thesis and Dissertation Defenses
 Abstract:  The overall goal of the Bulge Asymmetries and Dynamical Evolution (BAaDE) SiO maser survey of red giants is to extract a gravitational potential in order to model Galactic dynamics, by providing line-of-sight velocities and positions for each source.  If distance estimates could be included with the velocities and positions, the outcomes would be greatly enhanced.  We here explore a statistical method of estimating distances to the BAaDE sources, by using their infrared spectral energy distributions (SEDs).  We have constructed an infrared catalog of the 28,062 BAaDE sources, with wavelength coverage from 0.71 to 80 microns.  Using this catalog, we fit the data for each source to a model SED in order to obtain a bolometric flux and other source characteristics.  With a statistical approach we calibrate a template SED using similarly colored Red Giant stars with known parallax-distances, to obtain relations between distances and SED parameters.
 Host:  Ylva Pihlström
 Location:  Room 190, Physics & Astronomy

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