Astronomy Seminar: Stars, Spectra, and Statistics

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Date/Time:Friday, 26 Apr 2019 from 4:10 pm to 5:10 pm
Location:Rm. 38, Physics Hall
Cost:0.0
Contact:Curt Struck
Phone:515-294-3666
Channel:Astronomy
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Miles Lucas, Dept. of Physics and Astronomy, ISU

I am developing a spectral modeling package to fit and characterize near-infrared spectra of nearby stars from the NASA IRTF/SpeX instrument. The goal of this project is to study asteroid belt analogs in debris disks around stars to give an insight on planetary system dynamics. I will be presenting the methodology for this package's flexible spectroscopic inference. These methods solve the problems found in current spectral fitting routines by fitting all spectral lines simultaneously and giving special care to error propagation. Most importantly, I will discuss the use of a spectral emulator for better addressing the deficiencies in spectral model libraries as well as modeling residuals to better represent uncertainties in fitted parameters.