130 citations · 227 across the 16 of their papers we have counts for
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Solar Cycle Variation of Sustained Gamma Ray Emission from the Sun
Nat Gopalswamy, Pertti Mäkelä, Seiji Yashiro +3
We investigated the occurrence rate of the sustained gamma ray emission (SGRE) events from the Sun using data obtained by Fermi Large Area Telescope (LAT) since its launch in 2008.…
Role of CME clusters and CME-CME interactions in producing sustained -ray emission
Atul Mohan, Pertti Makela, Natchimuthuk Gopalswamy +2
Fast (V>1000) coronal mass ejections (CMEs) capable of accelerating protons beyond 300MeV are thought to trigger hours-long sustained -ray emissi…
Relationship between prominence eruptions and coronal mass ejections during solar cycle 24
Pooja Devi, Nat Gopalswamy, Seiji Yashiro +3
In this article, we present the relationship between prominence eruptions (PEs) and coronal mass ejections (CMEs) from May 2010 to December 2019 covering most of solar cycle 24. We…
Third Harmonic Structure in an Interplanetary Type II Radio Burst and Other Energetic Phenomena During the 2024 September 14 Solar Eruption
Nat Gopalswamy, Pertti Makela, Hong Xie +2
We report on the observation of first, second, and third harmonic components during an interplanetary (IP) type II solar radio burst observed on 2024 September 14 by the radio inst…
The Longest Duration SGRE Event in Solar Cycle 25
Nat Gopalswamy, Pertti Makela, Hong Xie +2
Solar Cycle (SC) 24 was the weakest in the space age, yet it produced many sustained gamma ray emission (SGRE) events from the Sun. Solar cycle (SC) 25, which is a bit stronger tha…
Multispacecraft Observations of the 2024 September 9 Backside Solar Eruption that Resulted in a Sustained Gamma Ray Emission Event
Nat Gopalswamy, Pertti Mäkelä, Sachiko Akiyama +6
We report on the 2024 September 9 sustained gamma ray emission (SGRE) event observed by the Large Area Telescope (LAT) onboard the Fermi satellite. The event was associated with a…
Solar Cycle Variation of Axial Orientations and Favorable Locations of Eruptive MFRs
Hong Xie, Nat Gopalswamy, Sachiko Akiyama +2
Using multi-viewpoint observations from STEREO and SOHO during three solar cycles from 23 to 25, we study the magnetic flux rope (MFR) structures of coronal mass ejections (CMEs) n…