Modeling and experimental study of the 27-day variation of galactic cosmic-ray intensity for a solar wind velocity depending on heliolongitude

被引：15

作者：

Alania, M. V. ^{[1
,2
]}

Modzelewska, R. ^{[1
]}

Wawrzynczak, A. ^{[3
]}

机构：

[1] Univ Podlasie, Inst Math & Phys, PL-08110 Siedlce, Poland

[2] Georgian Acad Sci, Inst Geophys, Tbilisi, Georgia

[3] Univ Podlasie, Inst Comp Sci, PL-08110 Siedlce, Poland

来源：

ADVANCES IN SPACE RESEARCH | 2010年 / 45卷 / 03期

关键词：

Cosmic rays; Magnetic field; 27-day variation; Solar wind; HELIOSPHERIC MAGNETIC-FIELD;

D O I：

10.1016/j.asr.2009.08.009

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We develop a three-dimensional (3-D) model of the 27-day variation of galactic cosmic-ray (GCR) intensity with a spatial variation of the solar wind velocity. A consistent, divergence-free interplanetary magnetic field is derived by solving the corresponding Maxwell equations with a variable solar wind speed, which reproduces in situ observed experimental data for the time interval to be analyzed (24 August 2007-28 February 2008). We perform model calculations for the GCR intensity using the variable solar wind and the corresponding magnetic field. Results are compatible with experimental data; the correlation coefficient between our model predictions and observed 27-day GCR variation is 0.80 +/- 0.05. (C) 2009 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：421 / 428

页数：8

共 25 条

[1] Study of the 27-day variations of the galactic cosmic ray intensity and anisotropy [J].

Alania, M. V. ;

Gil, A. ;

Modzelewska, R. .

ADVANCES IN SPACE RESEARCH, 2008, 41 (02) :280-286

[2]

Alania MV, 2005, Proceedings of the 29th International Cosmic Ray Conference, Vol 2: SH3, P215

[3]

Alania M.V., 1974, Quasi-Periodic Cosmic Ray Variations

[4]

Alania M.V., 2008, ASTROPHYS SPACE SCI, V4, P31, DOI DOI 10.5194/ASTRA-4-31-2008

[5]

Alania MV, 2002, ACTA PHYS POL B, V33, P1149

[6] 27-day variations of galactic cosmic rays and changes of solar and geomagnetic activities [J].

Alania, MV ;

Baranov, DG ;

Tyasto, MI ;

Vernova, ES .

GALACTIC AND ANOMALOUS COSMIC RAYS IN THE HELIOSPHERE: THE CYCLE 22 SOLAR MINIMUM AND THE ONSET OF CYCLE 23, 2001, 27 (03) :619-624

[7]

ALANIA MV, 2001, IZVESTIA RAN, V65, P370

[8] A Fisk-Parker hybrid heliospheric magnetic field with a solar-cycle dependence [J].

Burger, R. A. ;

Krueger, T. P. J. ;

Hitge, M. ;

Engelbrecht, N. E. .

ASTROPHYSICAL JOURNAL, 2008, 674 (01) :511-519

[9] The effect of a Fisk-type heliospheric magnetic field on cosmic-ray modulation [J].

Burger, RA ;

Hitge, M .

ASTROPHYSICAL JOURNAL, 2004, 617 (01) :L73-L76

[10] Motion of the footpoints of heliospheric magnetic field lines at the Sun: Implications for recurrent energetic particle events at high heliographic latitudes [J].

Fisk, LA .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1996, 101 (A7) :15547-15553

← 1 2 3 →