Simulations of cosmic rays in large-scale structures: numerical and physical effects
Simulations of cosmic rays in large-scale structures: numerical and physical effects
复制标题
大规模结构中的宇宙射线模拟:数值和物理效应
DOI:
10.1093/mnras/stu126
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发表时间:
2014
影响因子:
4.8
通讯作者:
Brüggen
中科院分区:
文献类型:
--
作者:
Gheller;Brüggen
Non-thermal (relativistic) particles are injected into the cosmos by structure formation shock waves, active galactic nuclei and stellar explosions. We present a suite of unigrid cosmological simulations (up to 20483) using a two-fluid model in the grid codeenzo. The simulations include the dynamical effects of cosmic ray (CR) protons and cover a range of theoretically motivated acceleration efficiencies. For the bulk of the cosmic volume the modelling of CR processes is rather stable with respect to resolution, provided that a minimum (cell) resolution of ≈100 kpc h−1is employed. However, the results for the innermost cluster regions depend on the assumptions for the baryonic physics. Inside clusters, non-radiative runs at high resolution tend to produce an energy density of CRs that are below available upper limits from theFermisatellite, while the radiative runs are found to produce a higher budget of CRs. We show that weak (M≤ 3–5) shocks and shock–re-acceleration are crucial to set the level of CRs in the innermost region of clusters, while in the outer regions the level of CR energy is mainly set via direct injection by stronger shocks, and is less sensitive to cooling and feedback from active galactic nuclei and supernovae.
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影响因子:
6.5
作者:
D. Eckert;S. Molendi;F. Vazza;S. Ettori;S. Paltani
通讯作者:
S. Paltani
DOI:
10.1111/j.1365-2966.2006.10474.x
发表时间:
2006-04
影响因子:
4.8
作者:
S. Bertone;C. Vogt;T. Ensslin
通讯作者:
S. Bertone;C. Vogt;T. Ensslin
DOI:
10.1111/j.1365-2966.2010.17013.x
发表时间:
2010-05
期刊:
arXiv: High Energy Astrophysical Phenomena
影响因子:
--
作者:
D. Caprioli;Hyesung Kang;Andrey Vladimirov;T. W. Jones-T. W.-Jones-2242948764
通讯作者:
D. Caprioli;Hyesung Kang;Andrey Vladimirov;T. W. Jones-T. W.-Jones-2242948764
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
T. Jeltema;S. Profumo
通讯作者:
S. Profumo
DOI:
10.1111/j.1365-2966.2012.22069.x
发表时间:
2012
影响因子:
4.8
作者:
H. Yang;P. Sutter;P. Ricker;P. Ricker
通讯作者:
P. Ricker