%0 Generic %1 pawlik2016aurora %A Pawlik, Andreas H. %A Rahmati, Alireza %A Schaye, Joop %A Jeon, Myoungwon %A Vecchia, Claudio Dalla %D 2016 %K reionisation simulation uvb %T The Aurora radiation-hydrodynamical simulations of reionization: calibration and first results %U http://arxiv.org/abs/1603.00034 %X We introduce a new suite of radiation-hydrodynamical simulations of galaxy formation and reionization called Aurora. The Aurora simulations make use of a spatially adaptive radiative transfer technique that lets us accurately capture the small-scale structure in the gas at the resolution of the hydrodynamics, in cosmological volumes. In addition to ionizing radiation, Aurora includes galactic winds driven by star formation and the enrichment of the universe with metals synthesized in the stars. Our reference simulation uses 2x512^3 dark matter and gas particles in a box of size 25 comoving Mpc/h with a force softening scale of at most 0.28 kpc/h. It is accompanied by simulations in larger and smaller boxes and at higher and lower resolution, employing up to 2x1024^3 particles, to investigate numerical convergence. All simulations are calibrated to yield simulated star formation rate (SFR) functions in close agreement with observational constraints at redshift z = 7 and to achieve reionization at z = 8.3, which is consistent with the observed optical depth to reionization. We focus on the design and calibration of the simulations and present some first results. The median stellar metallicities of low-mass galaxies at z = 6 are consistent with the metallicities of dwarf galaxies in the Local Group, which are believed to have formed most of their stars at high redshifts. After reionization, the mean photoionization rate decreases strongly with increasing resolution. This is mainly due to the increased abundance of small-scale gaseous systems absorbing ionizing radiation.

@misc{pawlik2016aurora, abstract = {We introduce a new suite of radiation-hydrodynamical simulations of galaxy formation and reionization called Aurora. The Aurora simulations make use of a spatially adaptive radiative transfer technique that lets us accurately capture the small-scale structure in the gas at the resolution of the hydrodynamics, in cosmological volumes. In addition to ionizing radiation, Aurora includes galactic winds driven by star formation and the enrichment of the universe with metals synthesized in the stars. Our reference simulation uses 2x512^3 dark matter and gas particles in a box of size 25 comoving Mpc/h with a force softening scale of at most 0.28 kpc/h. It is accompanied by simulations in larger and smaller boxes and at higher and lower resolution, employing up to 2x1024^3 particles, to investigate numerical convergence. All simulations are calibrated to yield simulated star formation rate (SFR) functions in close agreement with observational constraints at redshift z = 7 and to achieve reionization at z = 8.3, which is consistent with the observed optical depth to reionization. We focus on the design and calibration of the simulations and present some first results. The median stellar metallicities of low-mass galaxies at z = 6 are consistent with the metallicities of dwarf galaxies in the Local Group, which are believed to have formed most of their stars at high redshifts. After reionization, the mean photoionization rate decreases strongly with increasing resolution. This is mainly due to the increased abundance of small-scale gaseous systems absorbing ionizing radiation.}, added-at = {2016-03-02T09:57:29.000+0100}, author = {Pawlik, Andreas H. and Rahmati, Alireza and Schaye, Joop and Jeon, Myoungwon and Vecchia, Claudio Dalla}, biburl = {https://www.bibsonomy.org/bibtex/2a84dec70fd8f84389b7fab9d5bebd059/miki}, description = {[1603.00034] The Aurora radiation-hydrodynamical simulations of reionization: calibration and first results}, interhash = {1c9c1363b29895a88af93fbd77a40326}, intrahash = {a84dec70fd8f84389b7fab9d5bebd059}, keywords = {reionisation simulation uvb}, note = {cite arxiv:1603.00034Comment: 15 pages, 8 figures, submitted to MNRAS. Comments welcome}, timestamp = {2016-03-02T09:57:29.000+0100}, title = {The Aurora radiation-hydrodynamical simulations of reionization: calibration and first results}, url = {http://arxiv.org/abs/1603.00034}, year = 2016 }