Mathematics – Logic
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20113d&link_type=abstract
Spitzer Proposal ID #20113
Mathematics
Logic
Scientific paper
Observations of the Cosmic Infrared Background together with infrared cosmological surveys (e.g. at 24mu with MIPS) are showing that Luminous and Ultraluminous Infrared Galaxies (LIRG & ULIRG) play a critical role in the evolution of galaxies. Unfortunately, their spectral energy distributions (SED) are largely unconstrained in the far-infrared (FIR) part, which makes it difficult to derive accurate bolometric luminosities. Until now, extrapolations from mid-infrared (MIR) luminosities were used to derive the FIR and bolometric luminosities. Are these extrapolations accurate ? Are they valid at moderate and high redshift ? Given the critical contribution of SEDs to interpretations of the cosmological evolution of the luminosity functions, we need accurate measurements of SEDs in the FIR (and in the MIR to validate the extrapolations to longer wavelengths). The immediate objective of our program is to obtain low-resolution MIR spectra (with IRS) and FIR spectra (with MIPS SED) of a sample of about 17 moderate redshift galaxies (0.02
Dole Herve
Engelbracht Charles
Lagache Guilaine
Le Floc'h Emeric
Papovich Casey
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