Mathematics – Logic
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21441607l&link_type=abstract
American Astronomical Society, AAS Meeting #214, #416.07; Bulletin of the American Astronomical Society, Vol. 41, p.683
Mathematics
Logic
Scientific paper
Infrared emission reprocessed by dust is over a half of the total stellar energy output in the Universe. The earlier work by Nagamine et al. (2005) showed a reasonable agreement between cosmological simulations and observations regarding the space density of star-forming galaxies, but the differential distribution of sources among different types (e.g. LBG vs. submm galaxies) was still unclear. Clarifying the contribution of IR-bright galaxies to the total SFR is an important topic in galaxy formation. Here we compute the spectral energy distributions (SEDs) at UV to far-IR wavelengths for the simulated galaxies by coupling the cosmological simulation output from GADGET-3 with the GRASIL code (Silva, 1998), which allows us to compute the IR emission from dust of different sizes and geometries. Then, we compute the magnitudes, luminosity functions, galaxy number counts and redshift distribution in the 3.6, 4.5, 5.8, and 8.0 microns of IRAC and 24, 70, and 160 microns of MIPS bands, and compare with the Spitzer observations.
Lee Tae Song
Nagamine Kentaro
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