Evolution of vorticity and enstrophy in the intracluster medium
Evolution of vorticity and enstrophy in the intracluster medium
复制标题
簇内介质中涡度和熵的演化
DOI:
10.1093/mnras/stx1769
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发表时间:
2017
影响因子:
4.8
通讯作者:
Brüggen
中科院分区:
文献类型:
--
作者:
Wittor;Brüggen
Turbulence generated by large-scale motions during structure formation affects the evolution of the thermal and non-thermal components of the intracluster medium. As enstrophy is a measure of the magnitude of vorticity, we study the generation and evolution of turbulence by analysing the Lagrangian history of enstrophy. For this purpose, we combine cosmological simulations carried out with theenzocode with our Lagrangian post-processing tool CRaTer. This way we are able to quantify the individual source terms of enstrophy in the course of the accretion of groups on to galaxy clusters. Here, we focus on the redshift range fromz= 1 toz= 0. Finally, we measure the rate of dissipation of turbulence and estimate the resulting amplification of intracluster magnetic fields. We find that compressive and baroclinic motions are the main sources of enstrophy, while stretching motions and dissipation affect most of the ensuing enstrophy evolution. The rate of turbulent dissipation is able to sustain the amplification of intracluster magnetic fields to observed levels.
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影响因子:
4.8
作者:
F. Vazza;M. Brüggen;D. Wittor;C. Gheller;D. Eckert;M. Stubbe
通讯作者:
F. Vazza;M. Brüggen;D. Wittor;C. Gheller;D. Eckert;M. Stubbe
影响因子:
4.8
作者:
Wittor;Brüggen
通讯作者:
Brüggen
DOI:
10.1111/j.1365-2966.2009.15034.x
发表时间:
2008-08
影响因子:
4.8
作者:
K. Dolag;S. Borgani;S. Borgani;S. Borgani;G. Murante;V. Springel
通讯作者:
K. Dolag;S. Borgani;S. Borgani;S. Borgani;G. Murante;V. Springel
DOI:
10.3390/galaxies4040071
发表时间:
2016
期刊:
影响因子:
--
作者:
Wittor;Brüggen
通讯作者:
Brüggen
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.