MAGPHYS+photo-z: Constraining the Physical Properties of Galaxies with Unknown Redshifts

We present an enhanced version of the spectral modeling code MAGPHYS that allows the estimation of galaxy photometric redshift and physical properties simultaneously, together with robust characterization of their uncertainties. The self-consistent modeling over ultraviolet to radio wavelengths in MAGPHYS photo-z is unique compared to existing standard photometric redshift codes. The broader wavelength consideration is particularly useful for breaking certain degeneracies in color vs. redshift and for estimating photo-z values for dusty galaxies with limited observer-frame ultraviolet and optical data (or upper limits). We demonstrate the success of the code in estimating redshifts and physical properties for over 4,000 infrared-detected galaxies at 0.4