Modulation effect of magnetic corotating trap on 27-day cosmic ray variation in November–December 2014 | Zendy

В. Е. Сдобнов | Zendy; Valeriy Sdobnov | Zendy; М. В. Кравцова | Zendy; Сергей Олемской | Zendy; S. V. Olemskoy | Zendy

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Modulation effect of magnetic corotating trap on 27-day cosmic ray variation in November–December 2014

Author(s) -

В. Е. Сдобнов,

Valeriy Sdobnov,

М. В. Кравцова,

Сергей Олемской,

S. V. Olemskoy

Publication year - 2019

Publication title -

solar-terrestrial physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.11

H-Index - 2

ISSN - 2500-0535

DOI - 10.12737/stp-51201902

Subject(s) - physics , cosmic ray , amplitude , variation (astronomy) , neutron monitor , astrophysics , interplanetary spaceflight , coronal mass ejection , interplanetary medium , nuclear physics , astronomy , atmospheric sciences , solar wind , plasma , optics

We study the 27-day cosmic-ray (CR) intensity variation occurring in November–December 2014, using ground-based measurements from the worldwide network of neutron monitors and GOES-15 satellites. A determining factor in the considerable difference between amplitudes of the 27-day CR variation in November–December 2014 is shown to be significant changes in energy losses taking place when particles move in regular heliospheric electromagnetic fields. In this period, there was a long-living corotating trap produced by a vast coronal hole in the south of the Sun in interplanetary space. Configuration of this trap induced the energy loss of ~3–20 GeV CRs, due to which ground-based neutron monitors recorded an abnormally large amplitude of the 27-day variation.

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