Forbush Decrease in the Intensity of Cosmic Rays in a Toroidal Model of a Magnetic Cloud

被引：4

作者：

Petukhova, A. S. ^{[1
]}

Petukhov, I. S. ^{[1
]}

Petukhov, S. I. ^{[1
]}

机构：

[1] Russian Acad Sci, Yakut Res Ctr, Siberian Branch, Shafer Inst Cosmophys Res & Aeron, Pr Lenina 31, Yakutsk 677980, Russia

来源：

JETP LETTERS | 2015年 / 102卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

JETP Letter; Magnetic Cloud; Forbush Decrease; Particle Distribution Function; Back Trajectory;

D O I：

10.1134/S0021364015230125

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The time dynamics of the particle distribution function in a magnetic cloud with the shape of a toroidal segment with the characteristic (forceless) structure of a magnetic field has been calculated. The shape of the cloud at the subsequent propagation in the interplanetary space has been determined by the kinematic model. The magnetic field of the cloud is calculated using the freezing-in condition. A significant effect of regions connecting the magnetic cloud with the Sun on the propagation of particles in the region of perturbation has been revealed. The calculation of the particle density and anisotropy of the intensity demonstrates reasonable agreement with the measurements. The results indicate the decisive role of the characteristic structure of the magnetic field in the time dynamics of the Forbush decrease in the intensity of cosmic rays.

引用

页码：697 / 700

页数：4

共 11 条

[1] Abunin A. A., 2013, P ALL RUSS C SOL TER, P11
[2] Cane H. V., 1995, P 24 INT COSM RAY C, V4, P377
[3] Piston shock and Forbush effect
Krymsky, G. F.
Krivoshapkin, P. A.
Mamrukova, V. P.
Gerasimova, S. K.
[J]. ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 2009, 35 (10): : 696 - 700
[4] Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays
Kuwabara, T.
Bieber, J. W.
Evenson, P.
Munakata, K.
Yasue, S.
Kato, C.
Fushishita, A.
Tokumaru, M.
Duldig, M. L.
Humble, J. E.
Silva, M. R.
Dal Lago, A.
Schuch, N. J.
[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2009, 114
[5] LOCKWOOD JA, 1971, SPACE SCI REV, V12, P658, DOI 10.1007/BF00173346
[6] FORCE FREE EQUILIBRIA IN TOROIDAL GEOMETRY
MILLER, G
TURNER, L
[J]. PHYSICS OF FLUIDS, 1981, 24 (02) : 363 - 365
[7] Munakata K., 2006, Solar Terrestrial (ST), V2, P115, DOI [10.1142/9789812707185_0009, DOI 10.1142/9789812707185_0009]
[8] Parker E., 1963, INTERPLANETARY DYNAM
[9] Transparency of a magnetic cloud boundary for cosmic rays
I. S. Petukhov
S. I. Petukhov
[J]. Bulletin of the Russian Academy of Sciences: Physics, 2013, 77 (5) : 523 - 525
[10] Galactic cosmic ray intensity dynamics in the presence of large-scale solar wind disturbances
Petukhov, I. S.
Petukhov, S. I.
[J]. ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS, 2009, 35 (10): : 701 - 711

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