Optical Spectroscopic Diagnostics Of The Goals Sample.

Details Optical Spectroscopic Diagnostics Of The Goals Sample. Optical Spectroscopic Diagnostics Of The Goals Sample.

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21441605r&link_type=abstract

American Astronomical Society, AAS Meeting #214, #416.05; Bulletin of the American Astronomical Society, Vol. 41, p.683

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Scientific paper

The GOALS sample consists of the most IR luminous (LIR > 1011) nearby (z < 0.08) galaxies. The survey itself combines a complete Spitzer imaging and spectroscopic dataset with imaging data from Hubble, Chandra and GALEX for the more luminous portion of the sample. Study of these luminous and ultraluminous infrared galaxies (U/LIRGs) provides critical insight into highly dynamic, active systems. LIRGs are key laboratories for investigating galaxy evolution and account for the majority of the IR luminosity function out to z 1. In order to better understand these systems, it is crucial to investigate their power sources and environments at all possible wavelengths. Traditional optical emission line diagnostics provide a well-tested method for evaluating galactic environments.
We present a systematic analysis of optical emission line diagnostics compiled from existing optical spectroscopy of the GOALS sample. The data consists of measurements from the literature, archived spectra and some new observations. We consistently apply the same criteria for diagnosing the galaxy type. We discuss how our results compare with other diagnostics of starburst, AGN and shocks and how LIRGs compare to other samples. We also present plans for future optical spectroscopic observations of the complete sample, including observations with the new WiFeS integral field unit.

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