Abstract

Solar transients and their related interplanetary counterparts have severe effects on the space environments of the Earth. Therefore, the research of solar corona and interplanetary physics has become the focus of study for both solar and space scientists. Considerable progress has been achieved in these aspects by the solar and space physics community of China during 2012-2014, which will be given in this report. The brief report summarizes the research advances of solar corona and interplanetary physics into the following parts: solar wind origin and turbulence, coronal waves and seismology, solar eruptions, solar energetic particle and galactic cosmic ray, magnetic reconnection, Magnetohydrodynamic (MHD) models and their applications, waves and structures in solar wind, propagation of ICMEs/shocks and their arrival time predictions. These research achievements have been achieved by Chinese solar and space scientists independently or via international collaborations.

Highlights

  • Solar transients and their related interplanetary counterparts have severe effects on the space environments of the Earth

  • The mass flux of the outflow released from the funnel considered in their study was calculated to be appropriate for providing the mass flux at the coronal base of the solar wind, though additional heating and acceleration mechanisms were necessary to keep the velocity at the higher location

  • In the vicinity of the k axis, a minor spectral component appeared that probably corresponds to quasiparallel Alfvenic fluctuations. Their relative contribution to the total spectral density tended to decrease with radial distance. These findings suggested that solar wind turbulence underwent an anisotropic cascade transporting most of its magnetic energy toward larger k⊥ and that the anisotropy in the inertial range was radially developing further at scales that were relatively far from the ever increasing outer scale

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Summary

Solar Wind Origin and Turbulence

The origin of the heliospheric magnetic flux on the Sun, and the origin of the solar wind, is a topic of hot debate for both solar and space physics scientists. The waves seem to become gradually balanced toward shorter scales He et al.[7] presented observations of the power spectral anisotropy in the wave vector space of solar wind turbulence and studied how it evolves in interplanetary space with increasing heliocentric distance. They used magnetic field measurements from the Helios 2 spacecraft within 1 AU. Accuracy tests of the code were shown for different cases, i.e., particles moving in constant magnetic field, magnetic plus constant electric field and wave field

Coronal Waves and Seimology
Solar Eruptions
Solar Energetic Particle and Galactic Cosmic Ray
Magnetic Reconnection
Physics-based MHD Models and Their Applications
Findings
Waves and Structures in Solar Wind
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