Dust in ULIRG environments

Details Dust in ULIRG environments Dust in ULIRG environments

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003sptz.prop.1096s&link_type=abstract

Spitzer Proposal ID #1096

Computer Science

Scientific paper

ISO spectroscopy has revealed that the spectra of ULIRGs are not simply an ultra-luminous blend of AGN and starburst spectra. Instead, the 5-15 micron spectra show clear signs of ice and silicate absorption features, which distort their mid-infrared spectra. Especially puzzling are the 'modified' PAH emission features seen in the ISO-CAM-CVF spectra of the more luminous and distant ULIRGs. We propose to study the effects of ice and silicate absorption on the spectra of ULIRGs from the Tran et al. ISO ("ZZ-ULIRG") sample. This sample is supplemented with less luminous galaxies, which ISO has shown to be very dusty. Our goal is to obtain full low-res spectra for the complete sample and full high-res spectra for most of them.

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