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Related papers: Cut-off features in interplanetary solar radio typ…

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Context. Some of of the most prominent sources for energetic particles in our Solar System are huge eruptions of magnetised plasma from the Sun called coronal mass ejections (CMEs), which usually drive shocks that accelerate charged…

Solar and Stellar Astrophysics · Physics 2022-11-14 D. E. Morosan , J. Pomoell , A. Kumari , R. Vainio , E. K. J. Kilpua

Context: Metric type II bursts are the most direct diagnostic of shock waves in the solar corona. Aims: There are two main competing views about the origin of coronal shocks: that they originate in either blast waves ignited by the pressure…

Solar and Stellar Astrophysics · Physics 2015-05-28 A. Nindos , C. E. Alissandrakis , A. Hillaris , P. Preka-Papadema

This study examines the shock speed and source height of coronal shock waves using Type II solar radio bursts. The solar radio burst data from January 2022 to October 2023 were obtained from eCALLISTO archive. The type II radio bursts were…

Solar and Stellar Astrophysics · Physics 2025-04-02 G. L. S. S. Liyanage , J. Adassuriya , K. P. S. C. Jayaratne , C. Monstien

We study solar energetic particle (SEP) events during multiple solar eruptions. The analysed sequences, on 24-26 November 2000, 9-13 April 2001, and 22-25 August 2005, consisted of halo-type coronal mass ejections (CMEs) that originated…

Solar and Stellar Astrophysics · Physics 2015-12-16 Silja Pohjolainen , Firas Al-Hamadani , Eino Valtonen

Context. Solar activity is often accompanied by solar radio emission, consisting of numerous types of solar radio bursts. At low frequencies (<100 MHz) radio bursts with short durations of milliseconds, such as solar S-bursts, have been…

Metric type II radio bursts are usually early indicators of CME-driven shocks and other space weather phenomena in the solar corona. This paper presents a detailed investigation of the spectral properties of band-splitting type II radio…

Solar and Stellar Astrophysics · Physics 2023-02-28 F. N. Minta , S. Nozawa , K. Kozarev , A. Elsaid , A. Mahrous

Shocks in the solar corona can accelerate electrons that in turn generate radio emission known as type II radio bursts. The characteristics and morphology of these radio bursts in the dynamic spectrum reflect the evolution of the shock…

Solar and Stellar Astrophysics · Physics 2025-11-19 P. Zucca , P. Zhang , K. Kozarev , M. Nedal , M. Mancini , A. Kumari , D. E. Morosan , B. Dabrowski , P. T. Gallagher , A. Krankowski , C. Vocks

On 17 January 2005 two fast coronal mass ejections were recorded in close succession during two distinct episodes of a 3B/X3.8 flare. Both were accompanied by metre-to-kilometre type-III groups tracing energetic electrons that escape into…

Solar and Stellar Astrophysics · Physics 2015-03-18 A. Hillaris , O. Malandraki , K. -L Klein , P. Preka-Papadema , X. Moussas , C. Bouratzis , E. Mitsakou , P. Tsitsipis , A. Kontogeorgos

Type II solar radio bursts are generated by electrons accelerated by coronal shock waves. They appear in dynamic spectra as lanes drifting from higher to lower frequencies at the plasma frequency and its harmonic. These lanes can often be…

Solar and Stellar Astrophysics · Physics 2025-06-18 S. Normo , D. E. Morosan , P. Zhang , P. Zucca , R. Vainio

Fine structures embedded in type-IV burst continua may be used as diagnostics of the magnetic field restructuring and the corresponding energy release associated with the low corona development of flare/CME events. A catalog of 36 type-IV…

Solar and Stellar Astrophysics · Physics 2016-04-27 C. Bouratzis , A. Hillaris , C. E. Alissandrakis , P. Preka-Papadema , X. Moussas , C. Caroubalos , P. Tsitsipis , A. Kontogeorgos

One of the most prominent sources for energetic particles in our solar system are huge eruptions of magnetised plasma from the Sun called coronal mass ejections (CMEs), which usually drive shocks that accelerate charged particles up to…

Solar and Stellar Astrophysics · Physics 2023-12-13 D. E. Morosan , J. Pomoell , C. Palmroos , N. Dresing , E. Asvestari , R. Vainio , E. K. J. Kilpua , J. Gieseler , A. Kumari , I. C. Jebaraj

We have performed a statistical study of $152$ Type III radio bursts observed by Solar TErrestrial RElations Observatory (STEREO)/Waves between May 2007 and February 2013. We have investigated the flux density between $125$kHz and $16$MHz.…

Solar and Stellar Astrophysics · Physics 2014-10-09 V. Krupar , M. Maksimovic , O. Santolik , E. P. Kontar , B. Cecconi , S. Hoang , O. Kruparova , J. Soucek , H. Reid , A. Zaslavsky

In recent studies (Feng et al., 2012; Kong et al., 2012), we proposed that source properties of type II radio bursts can be inferred through a causal relationship between the special shape of the type II dynamic spectrum (e.g., bump or…

Solar and Stellar Astrophysics · Physics 2015-06-15 S. W. Feng , Y. Chen , X. L. Kong , G. Li , H. Q. Song , X. S. Feng , F. Guo

Radio bursts from the solar corona can provide clues to forecast space weather hazards. After recent technology advancements, regular monitoring of radio bursts has increased and large observational data sets are produced. Hence, manual…

Solar and Stellar Astrophysics · Physics 2019-08-30 Dayal Singh , K. Sasikumar Raja , Prasad Subramanian , R. Ramesh , Christian Monstein

We have performed statistical analysis of a large number of Type III radio bursts observed by STEREO between May 2007 and February 2013. Only intense, simple, and isolated cases have been included in our data set. We have focused on the…

Solar and Stellar Astrophysics · Physics 2015-06-23 Vratislav Krupar , Milan Maksimovic , Ondrej Santolik , Baptiste Cecconi , Oksana Kruparova

A study and classification of super-short structures (SSSs) recorded during metric type IV bursts is presented. The most important property of SSSs is their duration, at half power ranging from 4-50 ms, what is up to 10 times shorter than…

Solar and Stellar Astrophysics · Physics 2010-09-24 J. Magdalenić , A. Hillaris , P. Zlobec , B. Vršnak

Low-frequency (80-240 MHz) radio observations of the solar corona are presented using the Murchison Widefield Array (MWA), and several discoveries are reported. The corona is reviewed, followed by chapters on Type III bursts and…

Solar and Stellar Astrophysics · Physics 2019-12-05 Patrick I. McCauley

Type III solar radio storms, observed at frequencies below approximately 16 MHz by space borne radio experiments, correspond to the quasi-continuous, bursty emission of electron beams onto open field lines above active regions. The…

Solar and Stellar Astrophysics · Physics 2015-05-14 J. P. Eastwood , M. S. Wheatland , H. S. Hudson , S. Krucker , S. D. Bale , M. Maksimovic , K. Goetz , J. -L. Bougeret

Solar coronal shocks are very common phenomena in the solar atmosphere and are believed to be the drivers of solar type II radio bursts. However, the microphysical nature of these emissions is still an open problem. This paper proposes that…

Solar and Stellar Astrophysics · Physics 2015-06-19 G. Q. Zhao , L. Chen , D. J. Wu

The fine spectral structures of solar radio type-I bursts were observed by the solar radio telescope AMATERAS. The spectral characteristics, such as the peak flux, duration, and bandwidth, of the individual burst elements were…

Solar and Stellar Astrophysics · Physics 2015-06-19 Kazumasa Iwai , Yoshizumi Miyoshi , Satoshi Masuda , Fuminori Tsuchiya , Akira Morioka , Hiroaki Misawa