A low-frequency radio halo associated with a cluster of galaxies

Nature

Volumn 455, Issue 7215, 2008, Pages 944-947

  Brunetti, G ^a   Giacintucci, S ^a,b   Cassano, R ^a   Lane, W ^c   Dallacasa, D ^d   Venturi, T ^a   Kassim, N E ^c   Setti, G ^a,d   Cotton, W D ^e   Markevitch, M ^b  

^a INAF ISTITUTO DI RADIOASTRONOMIA   (Italy)

^b HARVARD SMITHSONIAN CENTER FOR ASTROPHYSICS   (United States)

^c NAVAL RESEARCH LABORATORY   (United States)

^d UNIVERSITY OF BOLOGNA   (Italy)

^e NATIONAL RADIO ASTRONOMY OBSERVATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ACCELERATION; CLUSTER ANALYSIS; ELECTRON; EXTRATERRESTRIAL MATTER; MAGNETIC FIELD; SOLAR RADIATION;

ARTICLE; ELECTRON; MAGNETIC FIELD; NATURAL SCIENCE; PRIORITY JOURNAL; RADIOFREQUENCY; SYNCHROTRON;

EID: 54049124640     PISSN: 00280836     EISSN: 14764687     Source Type: Journal    
DOI: 10.1038/nature07379     Document Type: Article

References (30)

1. Giovannini, G. & Feretti, L. in Diffuse Radio Sources and Cluster Mergers: Radio Haloes and Relics (eds Feretti, L., Gioia, I. M. & Giovannini, G.) 197-227 (Astrophys. Space Sci. Library 272, Kluwer, 2002).
2. Ferrari, C., Govoni, F., Schindler, S., Bykov, A. M. & Rephaeli, Y. Observations of extended radio emission in clusters. Space Sci. Rev. 134, 93-118 (2008).
3. Jaffe, W. J. Origin and transport of electrons in the halo radio source in the Coma cluster. Astrophys. J. 212, 1-7 (1977).
4. Schlickeiser, R., Sievers, A. & Thiemann, H. The diffuse radio emission from the Coma cluster. Astron. Astrophys. 182, 21-35 (1987).
5. Brunetti, G., Setti, G., Feretti, L. & Giovannini, G. Particle reacceleration in the Coma cluster: radio properties and hard X-ray emission. Mon. Not. R. Astron. Soc. 320, 365-378 (2001).
6. Petrosian, V. On the nonthermal emission and acceleration of electrons in coma and other clusters of galaxies. Astrophys. J. 557, 560-572 (2001).
7. Dennison, B. Formation of radio halos in clusters of galaxies from cosmic-ray protons. Astrophys. J. 239, L93-L96 (1980).
8. Blasi, P. & Colafrancesco, S. Cosmic rays, radio halos and nonthermal X-ray emission in clusters of galaxies. Astropart. Phys. 12, 169-183 (1999).
9. Dolag, K. & Ensslin, T. A. Radio halos of galaxy clusters from hadronic secondary electron injection in realistic magnetic field configurations. Astron. Astrophys. 362, 151-157 (2000).
10. Pfrommer, C. & Ensslin, T. A. Estimating galaxy cluster magnetic fields by the classical and hadronic minimum energy criterion. Mon. Not. R. Astron. Soc. 352, 76-90 (2004).
11. Giovannini, G., Tordi, M. & Feretti, L. Radio halo and relic candidates from the NRAO VLA Sky Survey. New Astron. 4, 141-155 (1999).
12. Buote, D. A. On the origin of radio halos in galaxy clusters. Astrophys. J. 553, L15-L18 (2001).
13. Cassano, R. et al. Revised statistics of radio halos and the reacceleration model. Astron. Astrophys. 480, 687-697 (2008).
14. Venturi, T. et al. GMRT Radio Halo Survey in galaxy clusters at z = 0.2 - 0.4. II. The eBCS clusters and analysis of the complete sample. Astron. Astrophys. 484, 327-340 (2008).
15. Fujita, Y., Takizawa, M. & Sarazin, C. L. Nonthermal emissions from particles accelerated by turbulence in clusters of galaxies. Astrophys. J. 584, 190-202 (2003).
16. Kuo, P.-H., Hwang, C.-Y. & Ip, W.-H. Diagnostic signatures of radio and hard X-ray emission on particle acceleration processes in the Coma cluster. Astrophys. J. 594, 732-740 (2003).
17. Brunetti, G., Blasi, P., Cassano, R. & Gabici, S. Alfvenic reacceleration of relativistic particles in galaxy clusters: MHD waves, leptons and hadrons. Mon. Not. R. Astron. Soc. 350, 1174-1194 (2004).
18. Melrose, D. B. Plasma Astrophysics (Gordon & Breach, 1980).
19. Cassano, R. & Brunetti, G. Cluster mergers and non-thermal phenomena: a statistical magnetoturbulent model. Mon. Not. R. Astron. Soc. 357, 1313-1329 (2005).
20. Brunetti, G. & Lazarian, A. Compressible turbulence in galaxy clusters: physics and stochastic particle re-acceleration. Mon. Not. R. Astron. Soc. 378, 245-275 (2007).
21. Brunetti, G. et al. Cosmic rays and radio halos in galaxy clusters: New constraints from radio observations. Astrophys. J. 670, L5-L8 (2007).
22. Arnaud, M., Maurogordato, S., Slezak, E. & Rho, J. A521: A cluster forming at the crossing of two filaments? Astron. Astrophys. 355, 461-478 (2000).
23. Ferrari, C., Arnaud, M., Ettori, S., Maurogordato, S. & Rho, J. Chandra observation of the multiple merger cluster Abell 521. Astron. Astrophys. 446, 417-428 (2006).
24. Giacintucci, S. et al. Shock acceleration as origin of the radio relic in A521? Astron. Astrophys. 486, 347-358 (2008).
25. Cohen, A. S. et al. The VLA Low-Frequency Sky Survey. Astron. J. 134, 1245-1262 (2007).
26. Sarazin, C. L. The energy spectrum of primary cosmic-ray electrons in clusters of galaxies and inverse Compton emission. Astrophys. J. 520, 529-547 (1999).
27. Brunetti, G. & Blasi, P. Alfvenic reacceleration of relativistic particles in galaxy clusters in the presence of secondary electrons and positrons. Mon. Not. R. Astron. Soc. 363, 1173-1187 (2005).
28. Reimer, O., Pohl, M., Sreekumar, P. & Mattox, J. R. EGRET upper limits on the high-energy gamma-ray emission of galaxy clusters. Astrophys. J. 588, 155-164 (2003).
29. Pfrommer, C. & Ensslin, T. A. Constraining the population of cosmic ray protons in cooling flow clusters with γ-ray and radio observations: Are radio mini-halos of hadronic origin? Astron. Astrophys. 413, 17-36 (2004).
30. Cassano, R., Brunetti, G. & Setti, G. Statistics of giant radio haloes from electron reacceleration models. Mon. Not. R. Astron. Soc. 369, 1577-1595 (2006).