A possible nearby origin for the highest-energy events observed

被引:0
作者
Biermann, PL [1 ]
Ahn, EJ [1 ]
Kronberg, PP [1 ]
Medina-Tanco, G [1 ]
Stanev, T [1 ]
机构
[1] Max Planck Inst Radioastron, D-53121 Bonn, Germany
来源
PHYSICS AND ASTROPHYSICS OF ULTRA-HIGH-ENERGY COSMIC RAYS | 2001年 / 576卷
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中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The detection of ultra high energy cosmic ray (UHECR) events beyond the cutoff expected from proton interactions with the microwave background has continued to defy an explanation on simple terms, Assuming that powerful radio galaxies are the source of UIJECR's at E greater than or equal to 10(19) eV, and that these are protons, susceptible to photon interactions over propagation paths longer than similar or equal to 30 Mpc, we present a possible solution that explains both the puzzling lack of a GZK cutoff due to photon interactions and the observed energy-independent isotropy of UHECR arrival directions. Our model has three essential ingredients: a) The highest energy particles come from the nearest powerful radio galaxy M87, b) they are isotropized in the magnetic field of a halo-wind of our Galaxy, and c) this isotropization can be naturally explained by a k(-2) wavenumber spectrum of magnetic irregularities in the halo wind, which makes the bending of particle orbits independent of energy. All three concepts are well established, and in essence we have combined them. At progressively lower energies near 5 x 1019 eV, some UHECR arrivals from additional radio galaxies at moderate distances will also get mixed in, Of all proposed solutions to the challenge presented by the high energy CR events this is the simplest one, and is it based on known physical processes.
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页码:181 / 195
页数:15
相关论文
共 102 条
[1]  
AHN EJ, 1999, ASTROPH9911123
[2]   Record energy of a giant shower [J].
Antonov, EE ;
Dedenko, LG ;
Pyt'ev, YP ;
Glushkov, AV ;
Pravdin, MI ;
Sleptsov, IE ;
Roganova, TM ;
Fedorova, GF .
JETP LETTERS, 1999, 69 (09) :650-655
[3]   New constraints from Haverah Park data on the photon and iron fluxes of ultrahigh-energy cosmic rays [J].
Ave, M ;
Hinton, JA ;
Vázquez, RA ;
Watson, AA ;
Zas, E .
PHYSICAL REVIEW LETTERS, 2000, 85 (11) :2244-2247
[4]   The rate of cosmic ray showers at large zenith angles:: a step towards the detection of ultra-high energy neutrinos by the Pierre Auger Observatory [J].
Ave, M ;
Vázquez, RA ;
Zas, E ;
Hinton, JA ;
Watson, AA .
ASTROPARTICLE PHYSICS, 2000, 14 (02) :109-120
[5]  
AVE M, 1999, P 26 ICRC, V1, P365
[6]   Galactic magnetism: Recent developments and perspectives [J].
Beck, R ;
Brandenburg, A ;
Moss, D ;
Shukurov, A ;
Sokoloff, D .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1996, 34 :155-206
[7]  
BEREZINSKY VS, 1988, ASTRON ASTROPHYS, V199, P1
[8]  
BEREZINSKY VS, 1990, ASTROPHYSICS COSMIC, pCH4
[9]   Origin and propagation of extremely high-energy cosmic rays [J].
Bhattacharjee, P ;
Sigl, G .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2000, 327 (3-4) :109-247
[10]  
BIERMANN L, 1951, Z ASTROPHYS, V29, P274