The influence of mergers on the cluster temperature function and cosmological parameters derived from it
The influence of mergers on the cluster temperature function and cosmological parameters derived from it
复制标题
合并对星团温度函数和由此导出的宇宙学参数的影响
DOI:
10.1051/0004-6361/201116632
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发表时间:
2012
影响因子:
6.5
通讯作者:
Bartelmann
中科院分区:
文献类型:
--
作者:
Angrick;Bartelmann
We develop a parameter-free analytic model to include the effects of mergers into the theoretical modelling of the X-ray temperature function of galaxy clusters. We include this description into our model for the cluster population based on fluctuations of the gravitational potential, which avoids any reference to mass. Comparisons with a numerical simulation reveal that the theoretical model is in good agreement with the simulation results. We show that building the model on the dynamics of spherical rather than ellipsoidal collapse yields better results if emission-weighted temperatures are used, while ellipsoidal collapse yields good agreement between model and simulation for mass-weighted temperatures. Analysing two different samples of X-ray clusters, we quantify the influence of mergers and a conversion between different temperature definitions on the joint determination of Ωm0andσ8. If effects of mergers are included, temperature functions based on cluster masses and on the gravitational potential built on spherical collapse are in good agreement with other cosmological probes without any conversion of temperatures.
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DOI:
10.1086/342239
发表时间:
2002-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Randall;C. Sarazin;P. Ricker
通讯作者:
S. Randall;C. Sarazin;P. Ricker
DOI:
10.1086/427554
发表时间:
2004
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
E. Rasia;P. Mazzotta;S. Borgani;L. Moscardini;K. Dolag;G. Tormen;A. Diaferio;G. Murante;U. Padova;Universita' di Roma Tor Vergata;Sao;Universita di UdineI.N.F.N. Trieste;Infn;U. Bologna;U. Torino;Osservatorio Astronomico di Pino Torinese
通讯作者:
Osservatorio Astronomico di Pino Torinese
DOI:
10.1111/j.1365-2966.2004.08167.x
发表时间:
2004-04
影响因子:
4.8
作者:
P. Mazzotta;E. Rasia;L. Moscardini;G. Tormen;Department of Physics University of RomeTor Vergata-Department-of-Physics-University-of-RomeTor-Vergata-1389703112;Italy Harvard-Smithsonian Center for Astrophysics;U. D. D. Astronomia-U.-D.-D.-Astronomia-1411788185;U. Padova;I. D. D. Astronomia-I.-D.-D.-Astronomia-102389674;U. Bologna;It
通讯作者:
P. Mazzotta;E. Rasia;L. Moscardini;G. Tormen;Department of Physics University of RomeTor Vergata-Department-of-Physics-University-of-RomeTor-Vergata-1389703112;Italy Harvard-Smithsonian Center for Astrophysics;U. D. D. Astronomia-U.-D.-D.-Astronomia-1411788185;U. Padova;I. D. D. Astronomia-I.-D.-D.-Astronomia-102389674;U. Bologna;It
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
T. Reiprich
通讯作者:
T. Reiprich
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
C. Angrick;M. Bartelmann
通讯作者:
M. Bartelmann