@article{0fb72faca81842cd9f3b1097b9d018bd,
title = "Local photoionization feedback effects on galaxies",
abstract = "We implement an optically thin approximation for the effects of the local radiation field from stars and hot gas on the gas heating and cooling in the N-body smoothed particle hydrodynamics code GASOLINE2. We resimulate three galaxies from the NIHAO project: one dwarf, one Milky Way-like, and one massive spiral, and study what are the local radiation field effects on various galaxy properties. We also study the effects of varying the ultraviolet background (UVB) model, by running the same galaxies with two different UVBs. Galaxy properties at z = 0 like stellar mass, stellar effective mass radius, H I mass, and radial extent of the H I disc show significant changes between the models with and without the local radiation field, and smaller differences between the two UVB models. The intrinsic effect of the local radiation field through cosmic time is to increase the equilibrium temperature at the interface between the galaxies and their circumgalactic media (CGM), moving this boundary inwards, while leaving relatively unchanged the gas inflow rate. Consequently, the temperature of the inflow increases when considering the local radiation sources. This temperature increase is a function of total galaxy mass, with a median CGM temperature difference of one order of magnitude for the massive spiral. The local radiation field suppresses the stellar mass growth by 20 per cent by z = 0 for all three galaxies, while the H I mass is roughly halved. The differences in the gas phase diagrams, significantly impact the H I column densities, shifting their peaks in the distributions towards lower NH I.",
keywords = "Galaxies: evolution, Galaxies: structure, Hydrodynamics, Methods: numerical, Plasmas, Radiative transfer",
author = "Aura Obreja and Macci{\`o}, {Andrea V.} and Benjamin Moster and Udrescu, {Silviu M.} and Tobias Buck and Rahul Kannan and Dutton, {Aaron A.} and Marvin Blank",
note = "Funding Information: We would like to thank Fabrizio Arrigoni Battaia for insightfull discussions related to this manuscript. This research was carried out on the High Performance Computing resources at New York University Abu Dhabi; on the THEO cluster of the Max-Planck-Institut f{\"u}r Astronomie and on the HYDRA clusters at the Rechenzen-trum in Garching. We greatly appreciate the contributions of these computing allocations. All figures in this work have been made with MATPLOTLIB (Hunter 2007), using the open-source PYTHON libraries: PYNBODY (Pontzen et al. 2013), NUMPY (Walt, Colbert & Varoquaux 2011), and SCIPY (Eric Jones et al. 2001). AO and BM are funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – MO 2979/1-1. TB acknowledges support from by the European Research Council under ERC-CoG grant CRAGSMAN-646955. RK acknowledges support from NASA through Einstein Postdoctoral Fellowship grant number PF7-180163 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060. Funding Information: We would like to thank Fabrizio Arrigoni Battaia for insightfull discussions related to this manuscript. This research was carried out on the High Performance Computing resources at New York University Abu Dhabi; on the THEO cluster of the Max-Planck-Institut f?r Astronomie and on the HYDRA clusters at the Rechenzentrum in Garching. We greatly appreciate the contributions of these computing allocations. All figures in this work have been made with MATPLOTLIB (Hunter 2007), using the open-source PYTHON libraries: PYNBODY (Pontzen et al. 2013), NUMPY (Walt, Colbert & Varoquaux 2011), and SCIPY (Eric Jones et al. 2001). AO and BM are funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - MO 2979/1-1. TB acknowledges support from by the European Research Council under ERC-CoG grant CRAGSMAN-646955. RK acknowledges support from NASA through Einstein Postdoctoral Fellowship grant number PF7-180163 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060. Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society",
year = "2019",
month = dec,
day = "1",
doi = "10.1093/mnras/stz2639",
language = "English (US)",
volume = "490",
pages = "1518--1538",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",
}