Using hydrodynamical simulations, we explore the use of the mean and
percentiles of the curvature distribution function to recover the equation of
state of the high-$z$ ($2 < z < 4$) intergalactic medium (IGM). We find that
the mean and percentiles of the absolute curvature distribution exhibit tight
correlation with the temperatures measured at respective characteristic
overdensities $\Delta_i$'s at each redshift. Hence, they provide nearly
independent probes of the same underlying temperature-density distribution, and
can in principle be used to simultaneously recover both parameters $T_0$ and
$\gamma$ of the IGM effective equation of state. We quantify the associated
errors in the recovered parameters $T_0$ and $\gamma$ from the intrinsic
scatter in the characteristic overdensities and the uncertainties in the
curvature measurement.
Описание
[1502.05140] Measuring the equation of state of the high-z intergalactic medium using curvature statistics
%0 Generic
%1 padmanabhan2015measuring
%A Padmanabhan, Hamsa
%A Srianand, R.
%A Choudhury, T. Roy
%D 2015
%K curvature equation igm method state
%T Measuring the equation of state of the high-z intergalactic medium using
curvature statistics
%U http://arxiv.org/abs/1502.05140
%X Using hydrodynamical simulations, we explore the use of the mean and
percentiles of the curvature distribution function to recover the equation of
state of the high-$z$ ($2 < z < 4$) intergalactic medium (IGM). We find that
the mean and percentiles of the absolute curvature distribution exhibit tight
correlation with the temperatures measured at respective characteristic
overdensities $\Delta_i$'s at each redshift. Hence, they provide nearly
independent probes of the same underlying temperature-density distribution, and
can in principle be used to simultaneously recover both parameters $T_0$ and
$\gamma$ of the IGM effective equation of state. We quantify the associated
errors in the recovered parameters $T_0$ and $\gamma$ from the intrinsic
scatter in the characteristic overdensities and the uncertainties in the
curvature measurement.
@misc{padmanabhan2015measuring,
abstract = {Using hydrodynamical simulations, we explore the use of the mean and
percentiles of the curvature distribution function to recover the equation of
state of the high-$z$ ($2 < z < 4$) intergalactic medium (IGM). We find that
the mean and percentiles of the absolute curvature distribution exhibit tight
correlation with the temperatures measured at respective characteristic
overdensities $\bar{\Delta}_i$'s at each redshift. Hence, they provide nearly
independent probes of the same underlying temperature-density distribution, and
can in principle be used to simultaneously recover both parameters $T_0$ and
$\gamma$ of the IGM effective equation of state. We quantify the associated
errors in the recovered parameters $T_0$ and $\gamma$ from the intrinsic
scatter in the characteristic overdensities and the uncertainties in the
curvature measurement.},
added-at = {2015-02-19T09:45:04.000+0100},
author = {Padmanabhan, Hamsa and Srianand, R. and Choudhury, T. Roy},
biburl = {https://www.bibsonomy.org/bibtex/206ae07bbc217b7ff01136130634d6f19/miki},
description = {[1502.05140] Measuring the equation of state of the high-z intergalactic medium using curvature statistics},
interhash = {65dd326b59203e0a7df2c65424c79b66},
intrahash = {06ae07bbc217b7ff01136130634d6f19},
keywords = {curvature equation igm method state},
note = {cite arxiv:1502.05140Comment: 5 pages, 4 figures, 1 table},
timestamp = {2015-02-19T09:45:12.000+0100},
title = {Measuring the equation of state of the high-z intergalactic medium using
curvature statistics},
url = {http://arxiv.org/abs/1502.05140},
year = 2015
}