Evolution of X-ray cavities
Evolution of X-ray cavities
复制标题
X射线腔的演变
DOI:
10.1111/j.1365-2966.2009.14684.x
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发表时间:
2009
影响因子:
4.8
通讯作者:
Scannapieco
中科院分区:
文献类型:
--
作者:
Brüggen;Scannapieco
A wide range of recent observations have shown that active galactic nuclei (AGN) driven cavities may provide the energy source that balances the cooling observed in the centres of ‘cool-core’ galaxy clusters. One tool for better understanding the physics of these cavities is their observed morphological evolution, which is dependent on such poorly understood properties as the turbulent density field and the impact of magnetic fields. Here, we combine numerical simulations that include subgrid turbulence and software that produces synthetic X-ray observations to examine the evolution of X-ray cavities in the absence of magnetic fields. Our results reveal an anisotropic size evolution of the cavities that is dramatically different from simplified, analytical predictions. These differences highlight some of the key issues that must be accurately quantified when studying AGN-driven cavities, and help to explain why the inferredpVenergy in these regions appears to be correlated with their distance from the cluster centre. Interpreting that X-ray observations will require detailed modelling of effects, including mass entrainment, distortion by drag forces and projection. Current limitations do not allow a discrimination between purely hydrodynamic and magnetically dominated models for X-ray cavities.
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DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
R. Smith;N. Brickhouse;D. Liedahl;J. Raymond
通讯作者:
J. Raymond
影响因子:
64.8
作者:
M. Brüggen;C. Kaiser
通讯作者:
C. Kaiser
DOI:
10.1111/j.1365-2966.2008.13162.x
发表时间:
2008-02
影响因子:
4.8
作者:
J. Croston;M. Hardcastle;M. Birkinshaw;D. Worrall;R. Laing
通讯作者:
J. Croston;M. Hardcastle;M. Birkinshaw;D. Worrall;R. Laing
DOI:
10.1086/591228
发表时间:
2008-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
E. Scannapieco;M. Brüggen
通讯作者:
E. Scannapieco;M. Brüggen
DOI:
10.1111/j.1745-3933.2006.00243.x
发表时间:
2006-06
影响因子:
--
作者:
S. Heinz;S. Heinz;M. Brüggen;A. Young;Emily M. Levesque
通讯作者:
S. Heinz;S. Heinz;M. Brüggen;A. Young;Emily M. Levesque