Mid-Infrared spectral properties of luminous starbursts and active nuclei at redshift z>0.6 : exploring the distant Universe with IRS

Details Mid-Infrared spectral properties of luminous starbursts and active nuclei at redshift z>0.6 : exploring the distant Universe with IRS Mid-Infrared spectral properties of luminous starbursts and active nuclei at redshift z>0.6 : exploring the distant Universe with IRS

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3216l&link_type=abstract

Spitzer Proposal ID #3216

Mathematics

Logic

Scientific paper

In the very recent years, deep cosmological surveys at infrared and submillimeter wavelengths have revealed the existence of a strongly evolving population of dust-enshrouded and luminous objects at high redshift. The activity of these sources mainly originates from star formation and can also be powered by accretion of matter around super massive black holes. Thus far, a critical step in understanding their role in the cosmic history has been the adoption of local spectral templates of luminous infrared galaxies as a foundation to infer the amount of their evolution. Yet, recent mid-infrared spectral results at redshifts z < 0.6 show a more complex interplay among star formation, AGN, and photo-dissociation regions that seriously challenge the use of local templates and correlations. This proposal aims to extend such spectral studies to higher redshifts (z ~ 0.6 to 1) and thus earlier lookback times, to assess the level and role of each of the processes. The unique capabilities of the recently-commissioned Spitzer Space Telescope provide unprecedented access to the nature of such objects. We therefore propose to perform IRS spectroscopy for a sample of luminous infrared galaxies at 0.6

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