%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 }