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The most intense solar energetic particle events are produced by coronal mass ejections (CMEs) accompanied by intense type II radio bursts below 15 MHz. Understanding where these type II bursts are generated relative to an erupting CME…

Solar and Stellar Astrophysics · Physics 2021-12-08 Alexander M. Hegedus , Ward B. Manchester , Justin C. Kasper

Solar type II radio bursts are commonly attributed to coronal shocks driven by coronal mass ejections (CMEs). However, some metric type II bursts have occasionally been reported to occur in the absence of a CME and to be associated with…

Solar and Stellar Astrophysics · Physics 2025-12-23 Yingli Cui , Xiangliang Kong , Zhentong Li , Bing Wang , Yadan Duan , Ze Zhong , Hao Ning , Zhao Wu , Manqing Wang , Yang Liu , Feiyu Yu , Zelong Jiang , Wei Chen , Yang Su , Yao Chen

Source imaging of solar radio bursts can be used to track energetic electrons and associated magnetic structures. Here we present a combined analysis of data at different wavelengths for an eruption associated with a moving type-IV (t-IVm)…

Solar and Stellar Astrophysics · Physics 2019-01-09 V. Vasanth , Yao Chen , Maoshui Lv , Hao Ning , Chuangyang Li , Shiwei Feng , Zhao Wu , Guohui Du

We present a statistical study on the observed solar radio burst emission associated with the origin of in situ detected solar energetic particles. Several proton event catalogs in the period 1996$-$2016 are used. At the time of appearance…

Solar and Stellar Astrophysics · Physics 2017-11-28 Rositsa Miteva , Susan W. Samwel , Vratislav Krupar

First-of-its-kind radio imaging of decameter solar stationary type IV radio burst has been presented in this paper. On 6 September 2014 the observations of type IV burst radio emission have been carried out with the two-dimensional…

Solar and Stellar Astrophysics · Physics 2016-08-03 Artem Koval , Aleksander Stanislavsky , Yao Chen , Shiwei Feng , Aleksander Konovalenko , Yaroslav Volvach

Coronal Mass Ejections (CMEs) are believed to be effective in producing shocks in the solar corona and the interplanetary space. One of the important signatures of shocks and shock acceleration are Type II solar radio bursts that drift with…

Solar and Stellar Astrophysics · Physics 2018-11-28 Nicolina Chrysaphi , Eduard P. Kontar , Gordon D. Holman , Manuela Temmer

This paper reports the observations of two coronal shocks from two Coronal Mass Ejections (CMEs) for the Successive type II Solar radio bursts observed on 02 May 2021 in the frequency range of 80 - 1 MHz with the time interval of ~ 20…

Solar and Stellar Astrophysics · Physics 2025-08-27 V. Vasanth

Type II radio bursts are solar radio emissions generated by electrons accelerated by coronal shocks. These bursts are typically found close to expanding coronal mass ejections (CMEs), making them valuable for studying the properties and…

Solar and Stellar Astrophysics · Physics 2026-05-13 K. Bhandari , D. E. Morosan , S. Normo

The results of the first observations of Type IV bursts at frequencies 10-30 MHz are presented. These observations were carried out at radio telescopes UTR-2 (Kharkov, Ukraine) and URAN-2 (Poltava, Ukraine) during the period 2003-2006.…

Solar and Stellar Astrophysics · Physics 2018-02-20 V. N. Melnik , H. O. Rucker , A. A. Konovalenko , V. V. Dorovskyy , E. P. Abranin , A. I. Brazhenko , B. Thide , A. A. Stanislavskyy

We study the characteristics of moving type IV radio bursts which extend to the hectometric wavelengths (interplanetary type IV or type IV IP bursts) and their relationship with energetic phenomena on the Sun. Our dataset comprises 48…

Solar and Stellar Astrophysics · Physics 2016-06-28 Alexander Hillaris , Constantine Bouratzis , Alexander Nindos

We report on a multi-wavelength analysis of the 26 January 2014 solar eruption involving a coronal mass ejection (CME) and a Type-II radio burst, performed by combining data from various space-and ground-based instruments. An increasing…

Decameter hectometric (DH; 1-14 MHz) type-IV radio bursts are produced by flare-accelerated electrons trapped in post-flare loops or the moving magnetic structures associated with the CMEs. From a space weather perspective, it is important…

Solar and Stellar Astrophysics · Physics 2024-07-09 Atul Mohan , Nat Gopalswamy , Anshu Kumari , Sachiko Akiyama , Sindhuja G

Type II radio bursts are observed in the Sun in association with many coronal mass ejections (CME's. In view of this association, there has been an expectation that, by scaling from solar flares to the flares which are observed on M dwarfs,…

Solar and Stellar Astrophysics · Physics 2019-03-06 D. J. Mullan , R. R. Paudel

The Sun produces the most powerful explosions in the solar system, solar flares, that can also be accompanied by large eruptions of magnetised plasma, coronal mass ejections (CMEs). These processes can accelerate electron beams up to…

Solar and Stellar Astrophysics · Physics 2023-07-05 D. E. Morosan , J. Pomoell , A. Kumari , E. K. J. Kilpua , R. Vainio

Metre wavelength type II solar radio bursts are believed to be the signatures of shock-accelerated electrons in the corona. Studying these bursts can give information about the initial kinematics, dynamics and energetics of CMEs in the…

Solar and Stellar Astrophysics · Physics 2023-07-12 Anshu Kumari , Diana E. Morosan , E. K. J. Kilpua , F. Daei

Solar type III radio bursts are generated by beams of energetic electrons that travel along open magnetic field lines through the corona and into interplanetary space. However, understanding the source of these electrons and how they escape…

Solar and Stellar Astrophysics · Physics 2023-07-20 Meiqi Wang , Bin Chen , Sijie Yu , Dale E. Gary , Jeongwoo Lee , Haimin Wang , Christina Cohen

We discuss an intriguing type II radio burst that occurred on 2011 March 27. The dynamic spectrum was featured by a sudden break at about 43 MHz on the well-observed harmonic branch. Before the break, the spectrum drifted gradually with a…

Solar and Stellar Astrophysics · Physics 2015-06-04 Xiang-Liang Kong , Yao Chen , Gang Li , Shi-Wei Feng , Hong-Qiang Song , Fan Guo , Fang-Ran Jiao

The radiation mechanism of decimetric wideband and pulsating radio bursts from the Sun (in terms of decimetric type-IV (t-IVdm) burst) and other flaring stars is a long-standing problem. Early investigations were based on the leading-spot…

Context: Solar eruptions, such as coronal mass ejections (CMEs), are often accompanied by accelerated electrons that can in turn emit radiation at radio wavelengths. This radiation is observed as solar radio bursts. The main types of bursts…

Solar and Stellar Astrophysics · Physics 2021-03-31 D. E. Morosan , A. Kumari , E. K. J. Kilpua , A. Hamini

Solar and interplanetary radio bursts can reflect the existence and motion of energetic electrons and are therefore a kind of vital phenomenon in solar activities. The present study reported a solar radio burst (SRB) event observed by…

Solar and Stellar Astrophysics · Physics 2024-06-18 Bing Ma , Ling Chen , De-Jin Wu , Marc Pulupa , Stuart D. Bale