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Interferometric imaging of the type IIIb and U radio bursts observed with LOFAR on 22 August 2017
Context. The Sun is the source of different types of radio bursts that are associated with solar flares, for example. Among the most frequently observed phenomena are type III solar bursts. Their radio images at low frequencies (below 100 MHz) are relatively poorly studied due to the limitations of legacy radio telescopes. \ Aims: We study the general characteristics of types IIIb and U with stria structure solar radio bursts in the frequency range of 20-80 MHz, in particular the source size and evolution in different altitu ...
Dabrowski, Bartosz; Miku\la, Katarzyna; Flisek, Pawe\l; Vocks, Christian; Zhang, PeiJin; c, Jasmina; Warmuth, Alexander; Morosan, Diana; n, Adam; Fallows, Richard; Bisi, Mario; Krankowski, Andrzej; Mann, Gottfried; B\laszkiewicz, Leszek; Carley, Eoin; Gallagher, Peter; Zucca, Pietro; Rudawy, Pawe\l; Hajduk, Marcin; Kotulak, Kacper; Sidorowicz, Tomasz;
Published by: \aap Published on: jan
YEAR: 2023   DOI: 10.1051/0004-6361/202142905
Parker Data Used; Sun: radio radiation; Sun: UV radiation; Sun: activity; methods: observational; Astrophysics - Solar and Stellar Astrophysics
Spectroscopic Measurements of the Ion Velocity Distribution at the Base of the Fast Solar Wind
In situ measurements of the fast solar wind reveal non-thermal distributions of electrons, protons, and minor ions extending from 0.3 au to the heliopause. The physical mechanisms responsible for these non-thermal properties and the location where these properties originate remain open questions. Here, we present spectroscopic evidence, from extreme ultraviolet spectroscopy, that the velocity distribution functions (VDFs) of minor ions are already non-Gaussian at the base of the fast solar wind in a coronal hole, at altit ...
Jeffrey, Natasha; Hahn, Michael; Savin, Daniel; Fletcher, Lyndsay;
Published by: The Astrophysical Journal Published on: 03/2018
YEAR: 2018   DOI: 10.3847/2041-8213/aab08c
Astrophysics - Solar and Stellar Astrophysics; line: profiles; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere; Sun: UV radiation; techniques: spectroscopic
Role of Transients in the Sustainability of Solar Coronal Plumes
Published by: \apj Published on: 06/2014
YEAR: 2014   DOI: 10.1088/0004-637X/787/2/118
Parker Data Used; plasmas; Sun: activity; Sun: corona; Sun: magnetic fields; Sun: UV radiation