The turbulent pressure support in galaxy clusters revisited
The turbulent pressure support in galaxy clusters revisited
复制标题
重新审视星系团中的湍流压力支持
DOI:
10.1093/mnrasl/sly172
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发表时间:
2018
影响因子:
--
通讯作者:
Gheller, C
中科院分区:
文献类型:
--
作者:
Vazza, F;Angelinelli, M;Jones, T W;Eckert, D;Brüggen, M;Brunetti, G;Gheller, C
Due to their late formation in cosmic history, clusters of galaxies are not fully in hydrostatic equilibrium and the gravitational pull of their mass at a given radius is expected not to be entirely balanced by the thermal gas pressure. Turbulence may supply additional pressure, and recent (X-ray and SZ) hydrostatic mass reconstructions claim a pressure support ofof the total pressure atR200. In this work we show that, after carefully disentangling bulk from small-scale turbulent motions in high-resolution simulations of galaxy clusters, we can constrain which fraction of the gas kinetic energy effectively provides pressure support in the cluster’s gravitational potential. While the ubiquitous presence of radial inflows in the cluster can lead to significant bias in the estimate of the non-thermal pressure support, we report that only a part of this energy effectively acts as a source of pressure, providing a support of the order ofof the total pressure atR200.
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DOI:
10.1111/j.1365-2966.2007.12241.x
发表时间:
2007-07
影响因子:
4.8
作者:
Elke Roediger;M. Brüggen
通讯作者:
Elke Roediger;M. Brüggen
DOI:
10.1086/430732
发表时间:
2005
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Brüggen;M. Hoeft;M. Ruszkowski
通讯作者:
M. Ruszkowski
DOI:
10.1086/505317
发表时间:
2005
期刊:
The Astrophysical Journal
影响因子:
--
作者:
E. Hallman;P. Motl;J. Burns;M. Norman
通讯作者:
M. Norman
影响因子:
4.8
作者:
Wittor;Brüggen
通讯作者:
Brüggen
影响因子:
4.8
作者:
M. Roncarelli;S. Ettori;S. Borgani;K. Dolag;D. Fabjan;L. Moscardini
通讯作者:
L. Moscardini