ON COSMIC RAY MODULATION BEYOND THE HELIOPAUSE: WHERE IS THE MODULATION BOUNDARY?

被引：62
|
作者：
Scherer, K. [1 ]
Fichtner, H. [1 ]
Strauss, R. D. [2 ]
Ferreira, S. E. S. [2 ]
Potgieter, M. S. [2 ]
Fahr, H. -J. [3 ]
机构：
[1] Ruhr Univ Bochum, Inst Theoret Phys 4, D-44780 Bochum, Germany
[2] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa
[3] Univ Bonn, Argelander Inst, D-53121 Bonn, Germany
来源：
ASTROPHYSICAL JOURNAL | 2011年 / 735卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
acceleration of particles; astroparticle physics; plasmas; shock waves; Sun: heliosphere; INTERSTELLAR MAGNETIC-FIELD; WIND TERMINATION SHOCK; SOLAR-WIND; HELIOSPHERIC INTERFACE; OUTER HELIOSPHERE; GALACTIC-CENTER; GAMMA-RAYS; HELIOSHEATH; TRANSPORT; SPECTRUM;
D O I：
10.1088/0004-637X/735/2/128
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Two of the paradigms in modeling the transport of galactic cosmic rays are that the modulation boundary is the heliopause and that the local interstellar spectra are identical to the galactic cosmic ray spectra. Here we demonstrate that the proton spectrum is already modulated due to an altered interstellar diffusion in the outer heliosheath as a consequence of the heliospheric "obstacle" in the interstellar flow. The main modulation effect however is adiabatic energy losses during a "confinement time" of cosmic rays inside the heliosphere.
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页数：5
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