Résumé / Abstract Seminaire_IAP
« Extracting Physics from Astronomical Spectra  »

Paul Hewett

Spectroscopic observations have been a fundamental part of observational astrophysics for more than a century. Notwithstanding the dramatic technological advances of the last two decades, that have led to major improvements in the resolution, wavelength coverage and quality, many spectral analysis techniques have remained largely unchanged. Few established techniques attempt to utilise the full information content of astronomical spectra. By contrast, recently developed statistical techniques offer the opportunity of extracting significantly more information, with a direct benefit for making progress on current problems in astrophysics. I will illustrate the power of some blind source separation techniques, utilising samples of Sloan Digital Sky Survey spectra, to investigate astrophysical problems related to quasars and galaxies.
vendredi 14 juin 2013 - 11:00
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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