Radiative feedback and the low efficiency of galaxy formation in low-mass haloes at high redshift

• DOI: 10.1093/mnras/stu956
• Publication Date: 2014-06-18T01:07:55Z
• Authors: Daniel Ceverino; Anatoly Klypin; Elizabeth S. Klimek; Sebastian Trujill...; Christopher W. Ch...; Joel Primack; Avishai Dekel
• Keywords: Radiation Pressure; Stellar mass

Any successful model of galaxy formation needs to explain the low rate star in small progenitors today's galaxies. This inefficiency is necessary for reproducing stellar-to-virial mass fractions, suggested by current abundance matching models. A possible driver this efficiency radiation pressure exerted ionizing photons from massive stars. The effect cosmological, zoom-in simulations modeled as a non-thermal that acts only dense and optically thick star-forming regions. We also include photoionization photoheating full hydrogen reduces radiative cooling $10^{4-4.5}$ K regime. main regulate limit high values gas density amount available formation. maintains $\sim 1 \ {\rm M_\odot} yr}^{-1}$ halos with masses about $10^{11} {M_\odot}$ at $z\simeq3$. Infrared trapping photoionization/photoheating processes are secondary effects range. galaxies residing these low-mass contain $\sim0.6\%$ total virial stars, roughly consistent matching. Radiative feedback an extended rising circular velocity profile.