Akari 2.5-5 Micron Spectra Of Luminous Infrared Galaxies In The Goals Survey
Abstract
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.
- Publication:
-
American Astronomical Society Meeting Abstracts #215
- Pub Date:
- January 2010
- Bibcode:
- 2010AAS...21536504I