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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 427 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 422 | - |
dc.citation.title | ASTROPHYSICAL JOURNAL | - |
dc.citation.volume | 456 | - |
dc.contributor.author | Kang, Hyesung | - |
dc.contributor.author | Ryu, Dongsu | - |
dc.contributor.author | Jones, TW | - |
dc.date.accessioned | 2023-12-22T12:40:18Z | - |
dc.date.available | 2023-12-22T12:40:18Z | - |
dc.date.created | 2015-08-27 | - |
dc.date.issued | 1996-01 | - |
dc.description.abstract | Three-dimensional hydrodynamic simulations of large-scale structure in the universe have shown that accretion shocks form during the gravitational collapse of one-dimensional caustics, and that clusters of galaxies formed at intersections of the caustics are surrounded by these accretion shocks. Estimated speed and curvature radius of the shocks are 1000-3000 km s(-1) and about 5 Mpc, respectively, in the Omega = 1 cold dark matter universe, Assuming that energetic protons are accelerated by these accretion shocks via the first-order Fermi process and modeling particle transport around the shocks through Bohm diffusion, we suggest that protons can be accelerated up to the Greisen cutoff energy near 6 x 10(19) eV, provided the mean magnetic field strength in the region around the shocks is at least of order 1 mu G. We have also estimated the proton flux at Earth from the Virgo Cluster. Assuming that a few (1-10) percent of the ram pressure of the infalling matter would be transferred to the cosmic rays, the estimated flux for E similar to 10(19) eV is consistent with observations, so that such clusters could be plausible sources of the ultrahigh-energy cosmic rays | - |
dc.identifier.bibliographicCitation | ASTROPHYSICAL JOURNAL, v.456, no.2, pp.422 - 427 | - |
dc.identifier.doi | 10.1086/176666 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.scopusid | 2-s2.0-21844518217 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/18552 | - |
dc.identifier.url | http://adsabs.harvard.edu/doi/10.1086/176666 | - |
dc.identifier.wosid | A1996TN54100002 | - |
dc.language | 영어 | - |
dc.publisher | IOP PUBLISHING LTD | - |
dc.title | Cluster accretion shocks as possible acceleration sites for ultra-high-energy protons below the Greisen cutoff | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
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