Improved Models for Cosmic Infrared Background Anisotropies: New Constraints on the IR Galaxy Population

Understand

The power spectrum of cosmic infrared background (CIB) anisotropies is sensitive to the connection between star formation and dark matter halos over the entire cosmic star formation history.

• Here we develop a model that associates star-forming galaxies with dark matter halos and their subhalos.
• The model is based on a parameterized relation between the dust-processed infrared luminosity and (sub)halo mass.
• By adjusting 3 free parameters, we attempt to simultaneously fit the 4 frequency bands of the Planck measurement of the CIB anisotropy power spectrum.