The Effects of X-Ray and UV Background Radiation on the Low-Mass Slope of the Galaxy Mass Function

D. C. Hambrick, J. P. Ostriker, P. H. Johansson +1

Even though the dark-matter power spectrum in the absence of biasing predicts a number density of halos n(M) ~ M^-2 (i.e. a Schechter alpha value of -2) at the low-mass end (M < 10…