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http://hdl.handle.net/2445/192626
Title: | An improved treatment of cosmological intergalactic medium evolution |
Author: | Manrique Oliva, Alberto Salvador Solé, Eduard |
Keywords: | Formació de les galàxies Cosmologia Galaxy formation Cosmology |
Issue Date: | 22-Apr-2015 |
Publisher: | Institute of Physics (IOP) |
Abstract: | The modeling of galaxy formation and reionization, two central issues of modern cosmology, relies on the accurate follow-up of the intergalactic medium (IGM). Unfortunately, owing to the complex nature of this medium, the differential equations governing its ionization state and temperature are only approximate. In this paper, we improve these master equations. We derive new expressions for the distinct composite inhomogeneous IGM phases, including all relevant ionizing/recombining and cooling/heating mechanisms, taking into account inflows/outflows into/from halos, and using more accurate recombination coefficients. Furthermore, to better compute the source functions in the equations we provide an analytic procedure for calculating the halo mass function in ionized environments, accounting for the bias due to the ionization state of their environment. Such an improved treatment of IGM evolution is part of a complete realistic model of galaxy formation presented elsewhere. |
Note: | Reproducció del document publicat a: https://doi.org/10.1088/0004-637X/803/2/103 |
It is part of: | Astrophysical Journal, 2015, vol. 803, num. 2, p. 103-109 |
URI: | http://hdl.handle.net/2445/192626 |
Related resource: | https://doi.org/10.1088/0004-637X/803/2/103 |
ISSN: | 0004-637X |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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