Browse > Article
http://dx.doi.org/10.5303/JKAS.2004.37.5.433

MERGERS, COSMIC RAYS, AND NONTHERMAL PROCESSES IN CLUSTERS OF GALAXIES  

SARAZIN CRAIG L. (Department of Astronomy, University of Virginia)
Publication Information
Journal of The Korean Astronomical Society / v.37, no.5, 2004 , pp. 433-438 More about this Journal
Abstract
Clusters of galaxies generally form by the gravitational merger of smaller clusters and groups. Major cluster mergers are the most energetic events in the Universe since the Big Bang. The basic properties of cluster mergers and their effects are discussed. Mergers drive shocks into the intracluster gas, and these shocks heat the intracluster gas. As a result of the impulsive heating and compression associated with mergers, there is a large transient increase in the X-ray luminosities and temperatures of merging clusters. These merger boost can affect X-ray surveys of clusters and their cosmological interpretation. Similar boosts occur in the strong lensing cross-sections and Sunyaev-Zeldovich effect in merging clusters. Merger shock and turbulence associated with mergers should also (re)accelerate nonthermal relativistic particles. As a result of particle acceleration in shocks and turbulent acceleration following mergers, clusters of galaxies should contain very large populations of relativistic electrons and ions. Observations and models for the radio, extreme ultraviolet, hard X-ray, and gamma-ray emission from nonthermal particles accelerated in these shocks will also be described. Gamma-ray observations with GLAST seem particularly promising.
Keywords
clusters of galaxies; cosmic rays; nonthermal processes;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Torri, E., Meneghetti, M., Bartelmann, M., Moscardini, L., Rasia, E., & Tormen, G. 2004, MNRAS, 349, 476   DOI   ScienceOn
2 Sarazin, C. L. 2002, in Merging Processes in Clusters of Galaxies, ed. L. Feretti, 1. M. Gioia, & G. Giovannini (Dordrecht: Kluwer), 1
3 Sarazin, C. L., & Lieu, R. 1998, ApJ, 494, LI77
4 Slee, O. B., Roy, A. L., Murgia, M., Andernach, H., & Ehle, M. 2001, AJ, 122, 1172   DOI   ScienceOn
5 Smith, G. P., Edge, A. C., Eke, V. R, Nichol, R C., Smail, 1., & Kneib, J.-P. 2003, ApJ, 590, L79   DOI   ScienceOn
6 Ricker, P. M., & Sarazin, C. L. 2001, ApJ, 561, 621   DOI   ScienceOn
7 Sarazin, C. L. 1999b, in Diffuse Thermal and Relativistic Plasma in Galaxy Clusters, ed. H. Bohringer, L. Feretti, & P. Schuecker (Garching: MPE Rep. 271), 185
8 Randall, S. W., Sarazin, C. L., & Ricker, P. M. 2004, preprint
9 Rephaeli, Y., & Gruber, D. 2003, ApJ, 579, 587   DOI   ScienceOn
10 Rephaeli, Y., Gruber, D., & Blanco, P. 1999, ApJ, 511, L21   DOI   ScienceOn
11 Rossetti, M., & Molendi, S. 2004, A&A, 414, L41   DOI   ScienceOn
12 Markevitch, M., & Vikhlinin, A. 2001, ApJ, 563, 95   DOI   ScienceOn
13 Sarazin, C. L. 1999a, ApJ, 520, 529   DOI
14 Kempner, J., Sarazin, C. L., & Ricker, P. R 2002, ApJ, 579,236   DOI   ScienceOn
15 Liang, H., Hunstead, R W., Birkinshaw, M., & Andreani, P. 2000, ApJ, 544, 686   DOI   ScienceOn
16 Randall, S. W., Sarazin, C. L., & Ricker, P. M. 2002, ApJ, 577, 579   DOI   ScienceOn
17 Nevalainen, J., Lieu, R., Bonamente, M., & Lumb, D. 2003, ApJ, 584, 716   DOI   ScienceOn
18 Randall, S. W., & Sarazin, C. L. 2004, preprint
19 Kempner, J., & Sarazin, C. L. 2001, ApJ, 548, 639   DOI   ScienceOn
20 Fusco-Femiano, R., Orlandini, M., Brunetti, G., Feretti, L., Giovannini, G., Grandi, P., & Setti, G. 2004, ApJ, 602, L73   DOI   ScienceOn
21 Gabici, S., & Blasi, P. 2004, APh, 20, 579
22 Kaastra, J. S., Lieu, R., Tamura, T., Paerels, F. B. S., & den Herder, J. W. 2003, A&A, 397, 445   DOI   ScienceOn
23 Govoni, F., Markevitch, M., Vikhlinin, A., VanSpeybroeck, L., Feretti, L., & Giovannini, G. 2004, ApJ, 605, 695   DOI   ScienceOn
24 Fusco-Femiano, R, et al., 2003, A&A, 398, 441   DOI   ScienceOn
25 Hudson, D. S., & Henriksen, M. J. 2003, ApJ, 595, Ll   DOI   ScienceOn
26 Buote, D. A., & Tsai, J. C. 1996, ApJ, 458, 27   DOI   ScienceOn
27 Fukazawa, Y., et al., 2001, ApJ, 546, L87   DOI   ScienceOn
28 Fusco-Femiano, R., et al., 1999, ApJ, 513, L21   DOI   ScienceOn
29 Fujita, Y., Sarazin, C. L., Kempner, J. C., Rudnick, L., Slee, O. B., Roy, A. L., Andernach, H., & Ehle, M. 2002, ApJ, 575, 764   DOI   ScienceOn
30 Fujita, Y., Takizawa, M., & Sarazin, C. L. 2003, ApJ, 584, 190   DOI   ScienceOn
31 Fusco-Femiano, R, et al., 2000, ApJ, 534, L7   DOI
32 Bowyer, S., Korpela, E. J., Lampton, M., Jones, T. W. 2004, ApJ, 605, 168   DOI   ScienceOn
33 Bacchi, M., Feretti, L., Giovannini, G., & Govoni, F. 2003, A&A, 400, 465   DOI   ScienceOn