Archetypal Analysis of GOALS Spitzer-IRS Spectra

Details Archetypal Analysis of GOALS Spitzer-IRS Spectra Archetypal Analysis of GOALS Spitzer-IRS Spectra

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21342436c&link_type=abstract

American Astronomical Society, AAS Meeting #213, #424.36; Bulletin of the American Astronomical Society, Vol. 41, p.252

Astronomy and Astrophysics

Astronomy

Scientific paper

The Great Observatories All-sky LIRG Survey (GOALS) is combining imaging and spectroscopic data from NASA's Spitzer, Hubble, Chandra and GALEX space-borne observatories in a comprehensive study of over 200 of the most luminous infrared-selected galaxies in the local Universe. This paper focuses on the Infrared spectroscopic data from the Spitzer-IRS.
In recent years, large-scale spectroscopic redshift surveys have triggered interest in automated galaxy classification techniques. Among these, archetypal analysis is unique in that it does not require a prior model and it uses the data itself to describe the statistically important features of the entire dataset. Archetypal analysis may be particularly useful in analyzing datasets comprising galaxy spectra, since each spectrum is, presumably, a superposition of the emission and/or absorption from the various stellar populations, ISM and nuclear activity making up that galaxy, and each of these mechanisms correspond to a potential archetype of the entire dataset. In this presentation, we demonstrate the use of Archetype Analysis in discovering the fundamental constituents of Infrared luminous galaxy spectra.

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