TY - JOUR

T1 - Exact solutions of magnetohydrodynamics for describing different structural disturbances in solar wind

AU - Grib, S. A.

AU - Leora, S. N.

N1 - Grib, S.A., Leora, S.N. Exact solutions of magnetohydrodynamics for describing different structural disturbances in solar wind. Geomagn. Aeron. 56, 166–173 (2016). https://doi.org/10.1134/S0016793216020079

PY - 2016/3/1

Y1 - 2016/3/1

N2 - We use analytical methods of magnetohydrodynamics to describe the behavior of cosmic plasma. This approach makes it possible to describe different structural fields of disturbances in solar wind: shock waves, direction discontinuities, magnetic clouds and magnetic holes, and their interaction with each other and with the Earth’s magnetosphere. We note that the wave problems of solar–terrestrial physics can be efficiently solved by the methods designed for solving classical problems of mathematical physics. We find that the generalized Riemann solution particularly simplifies the consideration of secondary waves in the magnetosheath and makes it possible to describe in detail the classical solutions of boundary value problems. We consider the appearance of a fast compression wave in the Earth’s magnetosheath, which is reflected from the magnetosphere and can nonlinearly overturn to generate a back shock wave. We propose a new mechanism for the formation of a plateau with protons of increased density and a magnetic field trough in the magnetosheath due to slow secondary shock waves. Most of our findings are confirmed by direct observations conducted on spacecrafts (WIND, ACE, Geotail, Voyager-2, SDO and others).

AB - We use analytical methods of magnetohydrodynamics to describe the behavior of cosmic plasma. This approach makes it possible to describe different structural fields of disturbances in solar wind: shock waves, direction discontinuities, magnetic clouds and magnetic holes, and their interaction with each other and with the Earth’s magnetosphere. We note that the wave problems of solar–terrestrial physics can be efficiently solved by the methods designed for solving classical problems of mathematical physics. We find that the generalized Riemann solution particularly simplifies the consideration of secondary waves in the magnetosheath and makes it possible to describe in detail the classical solutions of boundary value problems. We consider the appearance of a fast compression wave in the Earth’s magnetosheath, which is reflected from the magnetosphere and can nonlinearly overturn to generate a back shock wave. We propose a new mechanism for the formation of a plateau with protons of increased density and a magnetic field trough in the magnetosheath due to slow secondary shock waves. Most of our findings are confirmed by direct observations conducted on spacecrafts (WIND, ACE, Geotail, Voyager-2, SDO and others).

KW - Shock wave

KW - solar wind

KW - interplanetary magnetic field

KW - magnetic cloud

KW - tangential discontinuity

UR - http://www.scopus.com/inward/record.url?scp=84969902566&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=27154815

U2 - 10.1134/S0016793216020079

DO - 10.1134/S0016793216020079

M3 - Article

AN - SCOPUS:84969902566

VL - 56

SP - 166

EP - 173

JO - Geomagnetism and Aeronomy

JF - Geomagnetism and Aeronomy

SN - 0016-7932

IS - 2

ER -