Buried AGNs in ultraluminous infrared galaxies - A search for a strong dust temperature gradient -

Details Buried AGNs in ultraluminous infrared galaxies - A search for a strong dust temperature gradient - Buried AGNs in ultraluminous infrared galaxies - A search for a strong dust temperature gradient -

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.2306i&link_type=abstract

Spitzer Proposal ID #2306

Computer Science

Scientific paper

Ultraluminous infrared galaxies (ULIRGs) have been used extensively to trace the history of star formation in the early universe. However, the major issue of whether ULIRGs are powered primarily by starbursts or buried AGNs is poorly understood. We propose Spitzer IRS low-resolution spectroscopy of a complete sample of nearby non-Seyfert ULIRGs. By combining these data with ancillary ground-based 2.8-4.1 micron spectra, we will search for the signature of a strong dust temperature gradient, an excellent method to distinguish a buried AGN from a starburst, and quantitatively estimate the energetic importance of buried AGNs in ULIRGs. The wide wavelength coverage of Spitzer IRS is crucial for the success of this experiment.

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