We introduce a new set of large scale, high resolution hydrodynamical
simulations of the intergalactic medium: the Sherwood simulation suite. These
are performed in volumes 10^3-160^3 h^-3 comoving Mpc^3, span almost four
orders of magnitude in mass resolution with up to 17.2 billion particles, and
employ a variety of physics variations including warm dark matter and galactic
outflows. We undertake a detailed comparison of the simulations to high
resolution, high signal-to-noise observations of the Lyman-alpha forest over
the redshift range 2 < z < 5. The simulations are in very good agreement with
the observational data, lending further support to the paradigm that the
Lyman-alpha forest is a natural consequence of the web-like distribution of
matter arising in LCDM cosmological models. Only a small number of minor
discrepancies remain with respect to the observational data. Saturated
Lyman-alpha absorption lines with column densities N_HI > 10^14.5 cm^-2 at 2 <
z < 2.5 are underpredicted in the models. An uncertain correction for continuum
placement bias is required to match the distribution and power spectrum of the
transmitted flux, particularly at z > 4. Finally, the temperature of
intergalactic gas in the simulations may be slightly too low at z=2.7 and a
flatter temperature-density relation is required at z=2.4, consistent with the
expected effects of non-equilibrium ionisation during He-II reionisation.
Description
[1605.03462] The Sherwood simulation suite: overview and data comparisons with the Lyman-alpha forest at redshifts 2 < z < 5
cite arxiv:1605.03462Comment: 19 pages, 21 figures, submitted to MNRAS. Images and movies may be viewed at http://www.nottingham.ac.uk/astronomy/sherwood/
%0 Generic
%1 bolton2016sherwood
%A Bolton, James S.
%A Puchwein, Ewald
%A Sijacki, Debora
%A Haehnelt, Martin G.
%A Kim, Tae-Sun
%A Meiksin, Avery
%A Regan, John A.
%A Viel, Matteo
%D 2016
%K forest igm lya simulations
%T The Sherwood simulation suite: overview and data comparisons with the
Lyman-alpha forest at redshifts 2 < z < 5
%U http://arxiv.org/abs/1605.03462
%X We introduce a new set of large scale, high resolution hydrodynamical
simulations of the intergalactic medium: the Sherwood simulation suite. These
are performed in volumes 10^3-160^3 h^-3 comoving Mpc^3, span almost four
orders of magnitude in mass resolution with up to 17.2 billion particles, and
employ a variety of physics variations including warm dark matter and galactic
outflows. We undertake a detailed comparison of the simulations to high
resolution, high signal-to-noise observations of the Lyman-alpha forest over
the redshift range 2 < z < 5. The simulations are in very good agreement with
the observational data, lending further support to the paradigm that the
Lyman-alpha forest is a natural consequence of the web-like distribution of
matter arising in LCDM cosmological models. Only a small number of minor
discrepancies remain with respect to the observational data. Saturated
Lyman-alpha absorption lines with column densities N_HI > 10^14.5 cm^-2 at 2 <
z < 2.5 are underpredicted in the models. An uncertain correction for continuum
placement bias is required to match the distribution and power spectrum of the
transmitted flux, particularly at z > 4. Finally, the temperature of
intergalactic gas in the simulations may be slightly too low at z=2.7 and a
flatter temperature-density relation is required at z=2.4, consistent with the
expected effects of non-equilibrium ionisation during He-II reionisation.
@misc{bolton2016sherwood,
abstract = {We introduce a new set of large scale, high resolution hydrodynamical
simulations of the intergalactic medium: the Sherwood simulation suite. These
are performed in volumes 10^3-160^3 h^-3 comoving Mpc^{3}, span almost four
orders of magnitude in mass resolution with up to 17.2 billion particles, and
employ a variety of physics variations including warm dark matter and galactic
outflows. We undertake a detailed comparison of the simulations to high
resolution, high signal-to-noise observations of the Lyman-alpha forest over
the redshift range 2 < z < 5. The simulations are in very good agreement with
the observational data, lending further support to the paradigm that the
Lyman-alpha forest is a natural consequence of the web-like distribution of
matter arising in LCDM cosmological models. Only a small number of minor
discrepancies remain with respect to the observational data. Saturated
Lyman-alpha absorption lines with column densities N_HI > 10^14.5 cm^-2 at 2 <
z < 2.5 are underpredicted in the models. An uncertain correction for continuum
placement bias is required to match the distribution and power spectrum of the
transmitted flux, particularly at z > 4. Finally, the temperature of
intergalactic gas in the simulations may be slightly too low at z=2.7 and a
flatter temperature-density relation is required at z=2.4, consistent with the
expected effects of non-equilibrium ionisation during He-II reionisation.},
added-at = {2016-05-12T10:26:24.000+0200},
author = {Bolton, James S. and Puchwein, Ewald and Sijacki, Debora and Haehnelt, Martin G. and Kim, Tae-Sun and Meiksin, Avery and Regan, John A. and Viel, Matteo},
biburl = {https://www.bibsonomy.org/bibtex/22d19859fc3c389bcbe1b7c53977f893c/miki},
description = {[1605.03462] The Sherwood simulation suite: overview and data comparisons with the Lyman-alpha forest at redshifts 2 < z < 5},
interhash = {cd9fa9ff14cad6e0188fb8945c190ade},
intrahash = {2d19859fc3c389bcbe1b7c53977f893c},
keywords = {forest igm lya simulations},
note = {cite arxiv:1605.03462Comment: 19 pages, 21 figures, submitted to MNRAS. Images and movies may be viewed at http://www.nottingham.ac.uk/astronomy/sherwood/},
timestamp = {2016-05-12T10:26:24.000+0200},
title = {The Sherwood simulation suite: overview and data comparisons with the
Lyman-alpha forest at redshifts 2 < z < 5},
url = {http://arxiv.org/abs/1605.03462},
year = 2016
}