Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21536504i&link_type=abstract
American Astronomical Society, AAS Meeting #215, #365.04; Bulletin of the American Astronomical Society, Vol. 42, p.554
Astronomy and Astrophysics
Astronomy
Scientific paper
Luminous infrared galaxies (LIRGs) have infrared luminosities (LIR) above 1011 solar luminosities and a wide range of morphologies ranging from isolated spirals to late-stage mergers. Their infrared emission is believed to originate from powerful starbursts and/or AGN, but a complete accounting of the relative importance of each has not been completed using a large, sample until now. The Great Observatories All-Sky LIRG Survey (GOALS) consists of a multi-wavelength imaging and spectroscopic Spitzer, Hubble, Chandra and GALEX survey of a flux-limited sample of 202 LIRGs in the local Universe (z < 0.09). In addition, we have recently obtained 2.5-5 micron spectra of the GOALS sample with AKARI. The AKARI spectra are dominated by 3.3 micron PAH and Br-alpha emission features , as well as hot dust continuum emission. We will discuss the AKARI results, and compare these to the Spitzer data in order to present a complete picture of the relative importance of starbursts and AGN to LIRGs as seen in their infrared spectra from 3-40 microns.
Armus Lee
GOALS Team
Inami Hanae
Matsuhara Hideo
Surace Jason
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