Место работы автора, адрес/электронная почта: Институт космофизических исследований и аэрономии им. Ю. Г. Шафера СО РАН ; 677980, г. Якутск, пр. Ленина, 31 ; e-mail: toropov@ikfia.ysn.ru ; https://ikfia.ysn.ru
Ученая степень, ученое звание: канд. физ-.мат наук
Область научных интересов: Космические исследования, геофизика
ID Автора: SPIN-код: 5160-5861, РИНЦ AuthorID: 29151
Количество страниц: 12 с.
Periodic 24-hour variations in the intensity of galactic cosmic rays, continuously observed by ground-based detectors, are called solar diurnal variations. The nature of these variations lies in the existence in the interplanetary medium of an anisotropic spatial distribution of galactic cosmic rays, which arises during the interaction of these particles with the heliosphere. It is believed that the physical factors responsible for the observed anisotropy of galactic cosmic rays are the processes of convection, diffusion and their drift. The combination of these factors determines the main parameters of solar diurnal variations, such as amplitude, phase and energy spectrum. To study the energy spectrum of solar-diurnal variations, we used measurement data from muon telescopes of the Yakutsk Cosmic Ray Spectrograph after A.I. Kuzmin and Nagoya stations (Japan). The research approach is based on the idea of the crossed telescope method, originally designed to take into account the temperature effect. Due to the difference in the receiving characteristics of the crossed northern and southern directions of the above muon telescopes, the intensity variations recorded by them are sensitive to changes in the energy spectrum of solar-diurnal variations. This property was used to assess the dynamics of the energy spectrum of solar-diurnal variations for 22-25 cycles of solar activity. Analysis of the data obtained showed that in the last minimum of solar activity in 2018-2021. An anomalously early phase of solar-diurnal variations was observed. To study this phenomenon, we simulated the ratio and phase difference of a pair of northern and southern crossed directions for both muon telescopes for different types and values of the energy spectrum of solar-diurnal variations. A comparison of model calculations and observational data has made it possible to establish that during periods of minimum solar activity in the positive polarity of the general magnetic field of the Sun, a significant softening of the energy spectrum of solar-diurnal variations is observed. The reasons for the discovered phenomenon are discussed.
Динамика энергетического спектра солнечно-суточных вариаций интенсивности космических лучей в 22–25 циклах солнечной активности / П. Ю. Гололобов, С. К. Герасимова, В. Г. Григорьев [и др.] ; Институт космофизических исследований и аэрономии им. Ю. Г. Шафера // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 2 (96). - С. 46-57. - DOI: 10.25587/2222-5404-2024-21-2-46-57
DOI: 10.25587/2222-5404-2024-21-2-46-57
Количество страниц: 5 с.
Гололобов, П. Ю. Космические лучи: открытие, начало исследований / П. Ю. Гололобов, С. К. Герасимова, В. Г. Григорьев ; Институт космофизических исследований и аэрономии им. Ю. Г. Шафера. - (Связь времен) // Наука и техника в Якутии. - 2022. - N 2 (43). - С. 8-12. DOI: 10.24411/1728-516Х-2021-2-56-61.
DOI: 10.24412/1728-516X-2021-2-56-61
Количество страниц: 6 с.
Корякина, Т. В. Исследование береговой динамики арктического побережья Якутии с помощью данных спутников Sentinel-2 / Т. В. Корякина, С. К. Герасимова, М. И. Корякина // Современная школа как результат развития педагогической системы в условиях реализации ФГОС : материалы научно-практической конференции с международным участием, Якутск, 26 марта 2021 г. - 2021. - С. 153-158
Количество страниц: 6 с.
Особенности спорадических вариаций плотности и анизотропии галактических космических лучей в 24-м цикле солнечной активности / В. Г. Григорьев, С. К. Герасимова, П. Ю. Гололобов [и др.] // Солнечно-земная физика = Solar-Terrestrial Physics. – 2022. – Т. 8, N 1. – С. 34-38. – DOI: 10.12737/szf-81202204.
DOI: 10.12737/szf-81202204
Количество страниц: 16 с.
Гелиосферная модуляция космических лучей: модель и наблюдения / С. К. Герасимова, П. Ю. Гололобов, В. Г. Григорьев [и др.] // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017. – Т. 3, N 1. – С. 63-78. – DOI: 10.12737/23548.
DOI: 10.12737/23548
Количество страниц: 6 с.
Исследование методом главных компонент влияния геометрии нейтрального токового слоя гелиосферы и солнечной активности на модуляцию галактических космических лучей / П. Ю. Гололобов, П. А. Кривошапкин, Г. Ф. Крымский, С. К. Герасимова // Солнечно-земная физика = Solar-Terrestrial Physics. – 2020. – Т. 6, N 1. – С. 30-35.
DOI: 10.12737/szf-61202002
Количество страниц: 5 с.
The observable anisotropy of cosmic rays has first been decomposed into zonal harmonics and components of vector and tensor anisotropy. We examine Forbush decreases in cosmic rays that occurred in November 2001 and November 2004. It is shown that at the beginning of a Forbush decrease an antisunward convective current of cosmic rays predominates; and during the recovery phase, a sunward diffusive current of particles along the interplanetary magnetic field dominates. During the phase of intensity drop, short-time decreases in the second zonal harmonic take place. These decreases occur with abrupt changes of the interplanetary magnetic field intensity and solar wind speed. During the passage of large-scale solar wind disturbances, the tensor anisotropy behaves in a complicated way. To explain its behavior, a further detailed investigation is required.
Investigating tensor anisotropy of cosmic rays during large-scale solar wind disturbances = Исследование тензорной анизотропии космических лучей во время крупномасштабных возмущений солнечного ветра / P. Yu. Gololobov, P. A. Krivoshapkin, G. F. Krymsky, V. G. Grigoryev, S. K. Gerasimova // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017, т. 3, N 2 : 13-я российско-китайская конференция по космической погоде. – С. 22-26.
DOI: 10.12737/22604
Количество страниц: 4 с.
We analyze time profiles of isotropic intensity, components of vector and tensor anisotropies of cosmic rays (CR) when Earth crosses the neutral sheet of the interplanetary magnetic field (IMF) in solar activity cycles 23-24. The moments of the crossings are determined from Wilcox Observatory synoptic charts and IMF data. Periods of Forbush decreases and ground level enhancements are excluded from the analysis. The events are analyzed for the epochs of positive and negative signs of the Sun’s general magnetic field. During each epoch, the crossings from the positive sector to the negative one and vice versa are separated. In total, 213 crossing events have been selected. The first two spherical harmonics of the angular CR-distribution are obtained using the global survey method. In each case, the average number of stations is equal to 32. The analysis shows that the temporal change of the isotropic component is caused by a magnetic mirror. For the first time, the zonal harmonics are reliably distinguished, and the existence of the antisymmetric diurnal CR-variation in a low energy range, which is oriented along IMF, is recognized. We compare our results with those obtained earlier.
Distribution of tensor anisotropy of cosmic rays near the neutral current sheet = Распределение тензорной анизотропии космических лучей в окрестности токового слоя / P. Yu. Gololobov, P. A. Krivoshapkin, G. F. Krymsky, V.G. Grigoryev, S. K. Gerasimova // Солнечно-земная физика = Solar-Terrestrial Physics. – 2017, т. 3, N 2 : 13-я российско-китайская конференция по космической погоде. – С. 18-21.
DOI: 10.12737/22603