Radial distribution of galactic cosmic rays at solar maximum

被引：0
作者：
Morales-Olivares, O. G. [1 ]
Caballero-Lopez, R. A. [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 4510, DF, Mexico
来源：
ADVANCES IN SPACE RESEARCH | 2012年 / 49卷 / 12期
关键词：
Cosmic ray modulation; Termination shock; Gradient; Spectrum; WIND TERMINATION SHOCK; OUTER HELIOSPHERE; MAGNETIC-FIELDS; MODULATION; HELIOSHEATH; GRADIENT; PARTICLE; VOYAGER;
D O I：
10.1016/j.asr.2012.02.032
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
In this paper we analyze the spatial distribution of galactic cosmic rays during periods of maximum solar activity of the cycles 21, 22 and 23. We have used a two dimensional model to solve the cosmic ray transport equation. This model includes all relevant physical processes: diffusion, convection, drift and shock effects on cosmic ray propagation inside the heliosphere. We focused on the study of the radial distribution of galactic cosmic rays, and compare our results with the spacecraft observations for two energies (175 MeV H and 265 MeV/n He). Although the radial intensities of galactic cosmic rays can be explained qualitatively with all three local interstellar spectra (LISs) used in this work, we applied a reduced chi-squared analysis to investigate the best LIS that could fit the data. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1653 / 1659
页数：7
相关论文
共 27 条
  • [11] Zero outward flow velocity for plasma in a heliosheath transition layer
    Krimigis, Stamatios M.
    Roelof, Edmond C.
    Decker, Robert B.
    Hill, Matthew E.
    [J]. NATURE, 2011, 474 (7351) : 359 - 361
  • [12] The three-dimensional solar wind around solar maximum
    McComas, DJ
    Elliott, HA
    Schwadron, NA
    Gosling, JT
    Skoug, RM
    Goldstein, BE
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2003, 30 (10)
  • [13] The radial distribution of cosmic rays in the heliosphere at solar maximum
    McDonald, FB
    Fujii, Z
    Heikkila, B
    Lal, N
    [J]. HELIOSPHERE AT SOLAR MAXIMUM, 2003, 32 (04): : 633 - 638
  • [14] Moraal H, 2001, COSPAR COLL, V11, P147
  • [15] Radial and latitudinal gradients of galactic cosmic rays in the heliosphere at solar maximum
    Morales-Olivares, O. G.
    Caballero-Lopez, R. A.
    [J]. ADVANCES IN SPACE RESEARCH, 2010, 46 (10) : 1313 - 1317
  • [16] Morales-Olivares O.G., 2009, GEOFISICA INT, V48, P2009
  • [17] Secondary antiprotons and propagation of cosmic rays in the galaxy and heliosphere
    Moskalenko, IV
    Strong, AW
    Ormes, JF
    Potgieter, MS
    [J]. ASTROPHYSICAL JOURNAL, 2002, 565 (01) : 280 - 296
  • [18] Myers Z., 2003, Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Tsukuba, V4, P1805
  • [19] PASSAGE OF ENERGETIC CHARGED PARTICLES THROUGH INTERPLANETARY SPACE
    PARKER, EN
    [J]. PLANETARY AND SPACE SCIENCE, 1965, 13 (01) : 9 - &
  • [20] Cosmic radiation in the heliosphere at successive solar minima 4. Modulation of galactic cosmic rays during the three consecutive solar minimum periods of 1977/1978, 1987 and 1997
    Reinecke, JPL
    McDonald, FB
    Moraal, H
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2000, 105 (A6) : 12651 - 12658
123