Smith, AaronBromm, VolkerLoeb, Abraham2020-05-282016Smith, Aaron, Volker Bromm, and Abraham Loeb. 2016. Lyman α Radiation Hydrodynamics of Galactic Winds Before Cosmic Reionization. Monthly Notices of the Royal Astronomical Society 464, no. 3 (October 10): 2963–2978.0035-8711http://nrs.harvard.edu/urn-3:HUL.InstRepos:42668793The dynamical impact of Lyman-alpha (Ly{\alpha}) radiation pressure on galaxy formation depends on the rate and duration of momentum transfer between Ly{\alpha} photons and neutral hydrogen gas. Although photon trapping has the potential to multiply the effective force, ionizing radiation from stellar sources may relieve the Ly{\alpha} pressure before appreciably affecting the kinematics of the host galaxy or efficiently coupling Ly{\alpha} photons to the outflow. We present self-consistent Ly{\alpha} radiation-hydrodynamics simulations of high-z galaxy environments by coupling the Cosmic Ly{\alpha} Transfer code (COLT) with spherically symmetric Lagrangian frame hydrodynamics. The accurate but computationally expensive Monte-Carlo radiative transfer calculations are feasible under the one-dimensional approximation. The initial starburst drives an expanding shell of gas from the centre and in certain cases Ly{\alpha} feedback significantly enhances the shell velocity. Radiative feedback alone is capable of ejecting baryons into the intergalactic medium (IGM) for protogalaxies with a virial mass of Mvir≲108 M⊙. We compare the Ly{\alpha} signatures of Population III stars with 105 K blackbody emission to that of direct collapse black holes with a nonthermal Compton-thick spectrum and find substantial differences if the Ly{\alpha} spectra are shaped by gas pushed by Ly{\alpha} radiation-driven winds. For both sources, the flux emerging from the galaxy is reprocessed by the IGM such that the observed Ly{\alpha} luminosity is reduced significantly and the time-averaged velocity offset of the Ly{\alpha} peak is shifted redward.en-USgalaxies: formationgalaxies: high-redshiftcosmology: theoryJournal Article2017-02-1420162020-05-2810.1093/mnras/stw2591