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Electromagnetic radiation at higher harmonics of the plasma frequency ($\omega \sim n\omega_{pe}, n > 2$) has been occasionally observed in type II and type III solar radio bursts, yet the underlying mechanism remains undetermined. Here we…

Solar and Stellar Astrophysics · Physics 2023-12-22 Chuanyang Li , Yao Chen , Zilong Zhang , Hao Ning , TangMu Li

Type III radio bursts are radio emissions associated with solar flares. They are considered to be caused by electron beams traveling from the solar corona to the solar wind. Magnetic reconnection is a possible accelerator of electron beams…

Plasma Physics · Physics 2021-03-17 Xin Yao , Patricio A. Muñoz , Jörg Büchner , Xiaowei Zhou , Siming Liu

The evolution of a solar flare accelerated non-thermal electron population and associated plasma emission is considered in collisional inhomogeneous plasma. Non-thermal electrons collisionally evolve to become unstable and generate Langmuir…

Solar and Stellar Astrophysics · Physics 2014-10-10 Heather Ratcliffe , Eduard. P. Kontar

Type III solar radio bursts are generated by streams of energetic electrons accelerated at the Sun during periods of the solar activity. The generation occurs in two steps. Initially, electron beams generate electrostatic Langmuir waves and…

Solar and Stellar Astrophysics · Physics 2018-12-27 Vladimir Krasnoselskikh , Andrii Voshchepynets , Milan Maksimovic

Three-wave interactions between Langmuir and electromagnetic waves in plasma with unstable electron flows are believed to be the main cause for type II and III solar radio emissions. The narrow band of type II bursts requires to assume that…

Plasma Physics · Physics 2022-08-16 V. V. Annenkov , E. P. Volchok , I. V. Timofeev

Electromagnetic fundamental and harmonic emission is ubiquitously observed throughout the heliosphere, and in particular it is commonly associated with the occurrence of Type II and III solar radio bursts. Classical analytic calculations…

Solar and Stellar Astrophysics · Physics 2024-02-20 Fabio Bacchini , Alexander A. Philippov

During Type III solar radio bursts, beam-driven upper-hybrid wave turbulence is converted into electromagnetic emissions at the fundamental plasma frequency and its harmonic, through a chain of various linear and nonlinear wave processes.…

Plasma Physics · Physics 2026-01-15 Francisco Javier Polanco-Rodríguez , Catherine Krafft , Philippe Savoini

Non-thermal electrons accelerated in the solar corona can produce intense coherent radio emission, known as solar type III radio bursts. This intense radio emission is often observed from hundreds of MHz in the corona down to the tens of…

Solar and Stellar Astrophysics · Physics 2014-12-10 H. Ratcliffe , E. P. Kontar , H. A. S. Reid

Type-III-burst radio signals can be mimicked in the laboratory via laser-plasma interaction. Instead of an electron beam generating Langmuir waves (LW) in the interplanetary medium, the LWs are created by a laser interacting with a…

We study the influence of kinetic-scale Alfv\'enic turbulence on the generation of plasma radio emission in the solar coronal regions where the plasma/magnetic pressure ratio $\beta $ is smaller than the electron/ion mass ratio…

Space Physics · Physics 2017-11-03 Olena Lyubchyk , Eduard Kontar , Yuriy Voitenko , Nicolas Bian , Donald Melrose

Type III radio bursts are a signature of the flux of near-relativistic electrons ejected during solar flares. These bursts are frequently observed by spacecraft such as the Parker Solar Probe. It is traditionally believed that these…

Aims. The simulation of three-wave interaction based plasma emission, thought to be the underlying mechanism for Type III solar radio bursts, is a challenging task requiring fully-kinetic, multi-dimensional models. This paper aims to…

Solar and Stellar Astrophysics · Physics 2015-12-02 J. O. Thurgood , D. Tsiklauri

$\textit{AIMS.}$ To investigate processes associated with generation of type-III radiation. $\textit{METHODS.}$ Measure the amplitudes and phase velocities of Parker Solar Probe observed electric fields, magnetic fields, and plasma density…

The Sun frequently accelerates near-relativistic electron beams that travel out through the solar corona and interplanetary space. Interacting with their plasma environment, these beams produce type III radio bursts, the brightest…

Solar and Stellar Astrophysics · Physics 2021-06-04 Hamish A. S. Reid , Eduard P. Kontar

Understanding the properties of type III radio bursts in the solar corona and interplanetary space is one of the best ways to remotely deduce the characteristics of solar accelerated electron beams and the solar wind plasma. One feature of…

Solar and Stellar Astrophysics · Physics 2015-05-13 Hamish A. S. Reid , Eduard P. Kontar

Coherent radio emission mechanism of solar radio bursts is one of the most complicated and controversial topics in solar physics. To clarify the mechanism(s) of different types of solar radio bursts, (radio) wave excitation by energetic…

Solar and Stellar Astrophysics · Physics 2025-02-07 Xiaowei Zhou , Patricio Munoz , Jan Benacek , Lijie Zhang , Dejin Wu , Ling Chen , Zongjun Ning , Joerg Buechner

The study of the evolution of a suprathermal electron beam traveling through a background plasma is relevant for the physics of solar flares and their associated type III solar radio bursts. As they evolve guided by the coronal magnetic…

Astrophysics · Physics 2009-11-10 Alberto M. Vasquez , Daniel O. Gomez

The recent Parker Solar Probe (PSP) observations of type III radio bursts show that the effects of finite background magnetic field can be an important factor in the interpretation of data. In the present paper, the effects of background…

Solar and Stellar Astrophysics · Physics 2022-01-19 Sang-Yun Lee , Peter H. Yoon , Ensang Lee , Weichao Tu

Aims: Emission of radio waves from plasmas through plasma emission with fundamental and harmonic frequencies is a familiar process known from solar type II radio bursts. Current models assume the existence of counterstreaming electron beam…

Solar and Stellar Astrophysics · Physics 2014-05-08 Urs Ganse , Patrick Kilian , Felix Spanier , Rami Vainio

Dynamics of an spatially limited electron beam in the inhomogeneous solar corona plasma is considered in the framework of weak turbulence theory when the temperature of the beam significantly exceeds that of surrounding plasma. The…

Solar and Stellar Astrophysics · Physics 2019-03-22 Eduard P. Kontar
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