2 papers
astro-ph.HE2025
Solar Cycle Variation of Sustained Gamma-ray Emission Events from the Sun and Related Energetic Events
N. Gopalswamy, P. Mäkela, S. Akiyama +2
The sustained gamma ray emission (SGRE) from the Sun is one of the fascinating high energy phenomena closely related to the acceleration of protons to energies >300 MeV. Here we re…
astro-ph.SR2024
Origins of Very Low Helium Abundance Streams Detected in the Solar Wind Plasma
Yogesh, N. Gopalswamy, D. Chakrabarty +4
The abundance of helium () in the solar wind exhibits variations typically in the range from 2-5% with respect to solar cycle activity and solar wind velocity. However, the…