The circumgalactic medium of high redshift galaxies
A. Pallottini, S. Gallerani, and A. Ferrara. (2014)cite arxiv:1407.7854Comment: 5 pages, 4 figures, accepted for publication in MNRAS Letters.
Abstract
We study the properties of the circumgalactic medium (CGM) of high-$z$
galaxies in the metal enrichment simulations presented in Pallottini et al.
2014. At $z=4$, we find that the simulated CGM gas density profiles are
self-similar, once scaled with the virial radius of the parent dark matter
halo. We also find a simple analytical expression relating the neutral hydrogen
equivalent width ($EW_HI$) of CGM absorbers as a function of the
line of sight impact parameter ($b$). We test our predictions against mock
spectra extracted from the simulations, and show that the model reproduces the
$EW_HI(b)$ profile extracted from the synthetic spectra analysis.
When compared with available data, our CGM model nicely predicts the observed
$EW_HI(b)$ in $złesssim2$ galaxies, and supports the idea that the
CGM profile does not evolve with redshift.
Description
[1407.7854] The circumgalactic medium of high redshift galaxies
%0 Generic
%1 pallottini2014circumgalactic
%A Pallottini, Andrea
%A Gallerani, Simona
%A Ferrara, Andrea
%D 2014
%K cgm galaxy high-z simulation
%T The circumgalactic medium of high redshift galaxies
%U http://arxiv.org/abs/1407.7854
%X We study the properties of the circumgalactic medium (CGM) of high-$z$
galaxies in the metal enrichment simulations presented in Pallottini et al.
2014. At $z=4$, we find that the simulated CGM gas density profiles are
self-similar, once scaled with the virial radius of the parent dark matter
halo. We also find a simple analytical expression relating the neutral hydrogen
equivalent width ($EW_HI$) of CGM absorbers as a function of the
line of sight impact parameter ($b$). We test our predictions against mock
spectra extracted from the simulations, and show that the model reproduces the
$EW_HI(b)$ profile extracted from the synthetic spectra analysis.
When compared with available data, our CGM model nicely predicts the observed
$EW_HI(b)$ in $złesssim2$ galaxies, and supports the idea that the
CGM profile does not evolve with redshift.
@misc{pallottini2014circumgalactic,
abstract = {We study the properties of the circumgalactic medium (CGM) of high-$z$
galaxies in the metal enrichment simulations presented in Pallottini et al.
2014. At $z=4$, we find that the simulated CGM gas density profiles are
self-similar, once scaled with the virial radius of the parent dark matter
halo. We also find a simple analytical expression relating the neutral hydrogen
equivalent width (${\rm EW}_{\rm HI}$) of CGM absorbers as a function of the
line of sight impact parameter ($b$). We test our predictions against mock
spectra extracted from the simulations, and show that the model reproduces the
${\rm EW}_{\rm HI}(b)$ profile extracted from the synthetic spectra analysis.
When compared with available data, our CGM model nicely predicts the observed
${\rm EW}_{\rm HI}(b)$ in $z\lesssim2$ galaxies, and supports the idea that the
CGM profile does not evolve with redshift.},
added-at = {2014-07-31T09:35:16.000+0200},
author = {Pallottini, Andrea and Gallerani, Simona and Ferrara, Andrea},
biburl = {https://www.bibsonomy.org/bibtex/24a727aa18b7f4ee2aec66de83bd13f1b/miki},
description = {[1407.7854] The circumgalactic medium of high redshift galaxies},
interhash = {4b80bc73298aad23060a55baa5c27d78},
intrahash = {4a727aa18b7f4ee2aec66de83bd13f1b},
keywords = {cgm galaxy high-z simulation},
note = {cite arxiv:1407.7854Comment: 5 pages, 4 figures, accepted for publication in MNRAS Letters},
timestamp = {2014-07-31T09:35:16.000+0200},
title = {The circumgalactic medium of high redshift galaxies},
url = {http://arxiv.org/abs/1407.7854},
year = 2014
}