Testing cosmic ray acceleration with radio relics: a high-resolution study using MHD and tracers
Testing cosmic ray acceleration with radio relics: a high-resolution study using MHD and tracers
复制标题
用无线电遗迹测试宇宙射线加速:使用 MHD 和示踪剂的高分辨率研究
DOI:
10.1093/mnras/stw2631
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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
Weak shocks in the intracluster medium may accelerate cosmic-ray protons and cosmic-ray electrons differently depending on the angle between the upstream magnetic field and the shock normal. In this work, we investigate how shock obliquity affects the production of cosmic rays in high-resolution simulations of galaxy clusters. For this purpose, we performed a magneto-hydrodynamical simulation of a galaxy cluster using the mesh refinement codeENZO. We use Lagrangian tracers to follow the properties of the thermal gas, the cosmic rays and the magnetic fields over time. We tested a number of different acceleration scenarios by varying the obliquity-dependent acceleration efficiencies of protons and electrons, and by examining the resulting hadronic γ-ray and radio emission. We find that the radio emission does not change significantly if only quasi-perpendicular shocks are able to accelerate cosmic-ray electrons. Our analysis suggests that radio emitting electrons found in relics have been typically shocked many times before= 0. On the other hand, the hadronic γ-ray emission from clusters is found to decrease significantly if only quasi-parallel shocks are allowed to accelerate cosmic-ray protons. This might reduce the tension with the low upper limits on γ-ray emission from clusters set by theFermi-satellite.
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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:
F. Vazza;M. Brüggen;C. Gheller;P. Wang
通讯作者:
F. Vazza;M. Brüggen;C. Gheller;P. Wang
影响因子:
4.8
作者:
M. Brüggen
通讯作者:
M. Brüggen
DOI:
10.3847/0004-637x/819/2/149
发表时间:
2015
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Ackermann;M. Ajello;A. Albert;W. Atwood;L. Baldini;L. Baldini;J. Ballet;G. Barbiellini;G. Barbiellini;D. Bastieri;D. Bastieri;K. Bechtol;R. Bellazzini;E. Bissaldi;R. Blandford;E. Bloom;R. Bonino;E. Bottacini;J. Bregeon;P. Bruel;R. Buehler;G. Caliandro;R. Cameron;M. Caragiulo;M. Caragiulo;P. Caraveo;J. Casandjian;E. Cavazzuti;C. Cecchi;C. Cecchi;E. Charles;A. Chekhtman;G. Chiaro;S. Ciprini;S. Ciprini;J. Cohen;J. Conrad;S. Cutini;S. Cutini;S. Cutini;F. D’Ammando;F. D’Ammando;A. Angelis;F. Palma;R. Desiante;R. Desiante;S. Digel;L. Venere;L. Venere;P. Drell;C. Favuzzi;C. Favuzzi;S. Fegan;Y. Fukazawa;S. Funk;P. Fusco;P. Fusco;F. Gargano;D. Gasparrini;D. Gasparrini;N. Giglietto;N. Giglietto;F. Giordano;F. Giordano;M. Giroletti;G. Godfrey;D. Green;D. Green;I. Grenier;S. Guiriec;E. Hays;J. Hewitt;D. Horan;G. Jóhannesson;M. Kuss;S. Larsson;L. Latronico;J. Li;Liang Li;F. Longo;F. Longo;F. Loparco;F. Loparco;M. Lovellette;P. Lubrano;P. Lubrano;G. Madejski;S. Maldera;A. Manfreda;M. Mayer;M. Mazziotta;P. Michelson;W. Mitthumsiri;T. Mizuno;M. Monzani;A. Morselli;I. Moskalenko;S. Murgia;E. Nuss;T. Ohsugi;M. Orienti;E. Orlando;J. Ormes;D. Paneque;D. Paneque;M. Pesce;M. Pesce;V. Petrosian;F. Piron;G. Pivato;T. Porter;S. Rainò;S. Rainò;R. Rando;R. Rando;M. Razzano;A. Reimer;O. Reimer;M. Sánchez;C. Sgro’;E. Siskind;F. Spada;G. Spandre;P. Spinelli;P. Spinelli;H. Tajima;H. Tajima;H. Takahashi;J. Thayer;L. Tibaldo;D. Torres;G. Tosti;G. Tosti;E. Troja;E. Troja;G. Vianello;K. Wood;S. Zimmer;Y. Rephaeli;Y. Rephaeli
通讯作者:
Y. Rephaeli
影响因子:
4.9
作者:
Atwood, W. B.;Abdo, A. A.;Ziegler, M.
通讯作者:
Ziegler, M.