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Solar Energetic Particles (SEPs) and radio bursts are indicators of particle acceleration on the Sun and in the heliosphere. The accelerated particles have energies significantly higher than thermal particles up to several orders of…

太阳与恒星天体物理 · 物理学 2024-10-14 Nat Gopalswamy

Energetic particle populations are ubiquitous throughout the Universe. In our solar system, the most prominent sources of energetic particles are solar flares or collisionless shocks often driven by huge eruptions of magnetised plasma…

Solar radio bursts (SRBs) are intense emissions observed in radio wavelengths most frequently during solar transients, such as coronal mass ejections (CMEs) and flares. SRBs are direct signatures of accelerated electrons in the solar…

Space Weather is the study of the conditions in the solar wind that can affect life on the surface of the Earth, particularly the increasingly technologically sophisticated devices that are part of modern life. Solar radio observations are…

太阳与恒星天体物理 · 物理学 2024-05-03 Stephen M. White

Large solar energetic particle (SEP) events are thought to originate from the shocks driven by fast coronal mass ejections (CMEs) and thus generally accompanied by type II radio bursts. However, a significant proportion of type II radio…

太阳与恒星天体物理 · 物理学 2026-04-23 Xuchun Duan , Ting Li , Yingli Cui , Yijun Hou , Chuan Li , Nicolas Wijsen , Zelong Jiang , Yihua Yan , Suli Ma , Zheng Sun

Solar radio bursts are some of the brightest emissions at radio frequencies in the solar system. The emission mechanisms that generate these bursts offer a remote insight into physical processes in solar coronal plasma, while fine spectral…

太阳与恒星天体物理 · 物理学 2024-01-10 Pearse C. Murphy , Baptiste Cecconi , Carine Briand , Stéphane Aicardi

Coronal mass ejections (CMEs) are massive expulsions of magnetised plasma from a star, and are the largest contributors to space weather in the Solar System. CMEs are theorized to play a key role in planetary atmospheric erosion, especially…

Solar type II radio bursts are the signature of particle acceleration by shock waves in the solar corona and interplanetary medium. The shocks originate in solar eruptions involving coronal mass ejections (CMEs) moving at super-Alfvenic…

太阳与恒星天体物理 · 物理学 2019-12-17 Nat Gopalswamy , Pertti Mäkelä , Seiji Yashiro

In this review we summarize results of our analysis of the observations of solar eruptive flares made by the Ond\v{r}ejov radiospectrograph for more than twenty years. We also present some Potsdam-Tremsdorf radio spectra from our common…

太阳与恒星天体物理 · 物理学 2023-07-17 Marian Karlický

During Type III solar radio bursts, electromagnetic waves are radiated at plasma frequency $\omega_p$ and its harmonics by electrostatic wave turbulence generated by electron beams ejected by Sun in randomly inhomogeneous solar wind and…

太阳与恒星天体物理 · 物理学 2025-08-12 Catherine Krafft , Alexandr Volokitin , Francisco Javier Polanco-Rodríguez , Philippe Savoini

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…

太阳与恒星天体物理 · 物理学 2017-11-28 Rositsa Miteva , Susan W. Samwel , Vratislav Krupar

The Sun is an active source of radio emission which is often associated with the acceleration of electrons arising from processes such as solar flares and coronal mass ejections (CMEs). At low radio frequencies (<100 MHz), numerous solar S…

太阳与恒星天体物理 · 物理学 2019-04-17 D. E. Morosan , P. T. Gallagher

Using centimeter wave and decimeter wave solar radio spectral observations of the flares of November 18, 2003 and September 12, 2004, we have discussed two type II like bursts at the meter waves. The radio bursts show that the ordinary…

太阳与恒星天体物理 · 物理学 2020-09-30 Valery Fomichev , Gennady Chernov

Six cases of fast radio bursts (FRBs) have recently been discovered. The FRBs are bright (~0.1 - 1 Jy) and brief (~ 1 ms) pulses of radio emission with dispersion measures (DMs) that exceed Galactic values, and hence FRBs have been…

高能天体物理现象 · 物理学 2015-06-17 Abraham Loeb , Yossi Shvartzvald , Dan Maoz

Solar energetic particles (SEPs) are an important product of solar activity. They are connected to solar active regions and flares, coronal mass ejections (CMEs), EUV waves, shocks, Type II and III radio emissions, and X-ray bursts. These…

The phenomena observed at the Sun have a variety of unique radio signatures that can be used to diagnose the processes in the solar atmosphere. The insights provided by radio obervations are further enhanced when they are combined with…

太阳与恒星天体物理 · 物理学 2018-06-26 E. P. Kontar , A. Nindos

We report on four large filament eruptions (FEs) from solar cycles 23 and 24 that were associated with large solar energetic particle (SEP) events and interplanetary type II radio bursts. The post-eruption arcades corresponded to mostly…

太阳与恒星天体物理 · 物理学 2015-06-11 N. Gopalswamy , P. Makela , S. Akiyama , S. Yashiro , H. Xie , N. Thakur , S. W. Kahler

We investigated the relationship between the spectral structures of type II solar radio bursts in the hectometric and kilometric wavelength ranges and solar energetic particles (SEPs). To examine the statistical relationship between type II…

太阳与恒星天体物理 · 物理学 2020-01-15 Kazumasa Iwai , Seiji Yashiro , Nariaki V. Nitta , Yuki Kubo

Ions and electrons accelerated to high energies during flares and coronal mass ejections at the Sun may escape the solar atmosphere and, guided by the interplanetary magnetic fields, propagate through space to near-Earth locations. These…

太阳与恒星天体物理 · 物理学 2026-04-17 S. Dalla , K. Herbst , R. Muscheler , M. J. Owens

The energy and spectral shape of radio bursts may help us understand the generation mechanism of solar eruptions, including solar flares, CMEs, eruptive filaments, and various scales of jets. The different kinds of flares may have different…

太阳与恒星天体物理 · 物理学 2022-01-05 Chengming Tan , Karl-Ludwig Klein , Yihua Yan , Satoshi Masuda , Baolin Tan , Jing Huang , Guowu Yuan
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