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Radio U-bursts and J-bursts are signatures of electron beams propagating along magnetic loops confined to the corona. The more commonly observed type III radio bursts are signatures of electron beams propagating along magnetic loops that…

太阳与恒星天体物理 · 物理学 2017-11-01 Hamish A. S. Reid , Eduard P. Kontar

Fiber bursts are a type of fine structure that is often superposed on type IV radio continuum emission during solar flares. Although studied for many decades, its physical exciter, emission mechanism, and association with the flare energy…

太阳与恒星天体物理 · 物理学 2017-10-25 Zhitao Wang , Bin Chen , Dale E. Gary

Type III radio bursts are not only the most intense but also the most frequently observed solar radio bursts. However, a number of their defining features remain poorly understood. Observational limitations, such as a lack of sufficient…

太阳与恒星天体物理 · 物理学 2023-09-13 Immanuel Christopher Jebaraj , Vladimir Krasnoselskikh , Marc Pulupa , Jasmina Magdalenic , Stuart Bale

Ground- and space-based observations of solar flares from radio wavelengths to gamma-rays have produced considerable insights but raised several unsolved controversies. The last unexplored wavelength frontier for solar flares is in the…

An analysis of noise attenuation during eighty solar flares between 2013 and 2017 was carried out at frequencies 8-20 MHz using thirty-four SuperDARN radars and the EKB ISTP SB RAS radar. The attenuation was determined on the basis of noise…

As is well known, CME propagation often results in the fragmentation of the solar atmosphere on smaller regions of density (magnetic field) enhancement (depletion). It is expected that this type of fragmentation may have radio signatures.…

Solar type III radio bursts contain a wealth of information about the dynamics of electron beams in the solar corona and the inner heliosphere; currently unobtainable through other means. However, the motion of different regions of an…

太阳与恒星天体物理 · 物理学 2018-06-20 Hamish A. S. Reid , Eduard P. Kontar

We present meter wave solar radio spectra of the highest spectrotemporal resolution achieved to date. The observations, obtained with the first station of the Long Wavelength Array (LWA1), show unprecedented detail of solar emissions across…

太阳与恒星天体物理 · 物理学 2015-11-04 Samuel Tun Beltran , Sean Cutchin , Stephen White

Solar radio emission features a large number of fine structures demonstrating great variability in frequency and time. We present spatially resolved spectral radio observations of type IIIb bursts in the $30-80$ MHz range made by the Low…

太阳与恒星天体物理 · 物理学 2018-08-22 I. N. Sharykin , E. P. Kontar , A. A. Kuznetsov

The sudden release of magnetic energy on the Sun drives powerful solar flares and coronal mass ejections. The key issue is the difficulty in predicting the occurrence time and location of strong solar eruptions, i.e., those leading to the…

Type III radio bursts are intense radio emissions triggered by beams of energetic electrons often associated with solar flares. These exciter beams propagate outwards from the Sun along an open magnetic field line in the corona and in the…

太阳与恒星天体物理 · 物理学 2015-08-19 Vratislav Krupar , Eduard P. Kontar , Jan Soucek , Ondrej Santolik , Milan Maksimovic , Oksana Kruparova

The phenomenon of fast radio bursts (FRBs) was discovered in 2007. These are powerful (0.1-100 Jy) single radio pulses with durations of several milliseconds, large dispersion measures, and record high brightness temperatures suggesting…

高能天体物理现象 · 物理学 2018-12-14 S. B. Popov , K. A. Postnov , M. S. Pshirkov

Fast radio bursts (FRBs) are highly dispersed millisecond-duration radio bursts. Recent observations of a Galactic FRB suggest that at least some FRBs originate from magnetars, but the origin of cosmological FRBs is still not settled. Here…

Even small solar flares can display a surprising level of complexity regarding their morphology and temporal evolution. Many of their properties, such as energy release and electron acceleration can be studied using highly complementary…

太阳与恒星天体物理 · 物理学 2021-12-08 Marina Battaglia , Rohit Sharma , Yingjie Luo , Bin Chen , Sijie Yu , Säm Krucker

We report discovery of several energetic radio bursts at 34 MHz, using the Gauribidanur radio telescope. The radio bursts exhibit two important properties associated with the propagation of astronomical signals through the interstellar…

太阳与恒星天体物理 · 物理学 2015-12-23 Yogesh Maan

In solar physics, it is a big challenge to measure the magnetic fields directly from observations in the upper solar atmosphere, including the chromosphere and corona. Radio observations are regarded as the most feasible approach to…

太阳与恒星天体物理 · 物理学 2022-06-22 Baolin Tan

Solar type V radio bursts are associated with type III bursts. Several processes have been proposed to interpret the association, electron distribution, and emission. We present the observation of a unique type V event observed by…

太阳与恒星天体物理 · 物理学 2024-12-03 Arnold O. Benz , Clemens R. Huber , Vincenzo Timmel , Christian Monstein

Radio spectroscopy provides a unique inspection perspective for solar and space weather research, which can reveal the plasma and energetic electron information in the solar corona and inner heliosphere. However, Radio-Frequency…

太阳与恒星天体物理 · 物理学 2023-02-22 Peijin Zhang , André R. Offringa , Pietro Zucca , Kamen Kozarev , Mattia Mancini

We report multi-wavelength observations of four solar flares on 2014 July 07. We firstly select these flares according to the soft X-ray (SXR) and extreme ultraviolet (EUV) emissions recorded by the Extreme Ultraviolet Variability…

太阳与恒星天体物理 · 物理学 2021-05-05 Dong Li , Alexander Warmuth , Lei Lu , Zongjun Ning