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Starting from 1960s Type III-like bursts (Type III bursts with high drift rates) in a wide frequency range from 300 to 950MHz have been observed. These new bursts observed at certain frequency being compared to the usual Type III bursts at…

Type U radio bursts are impulsive coherent radio emissions produced by the Sun that indicate the presence of subrelativistic electron beams propagating along magnetic loops in the solar corona. In this work, we present the analysis of a…

太阳与恒星天体物理 · 物理学 2023-01-04 S. Mancuso , D. Barghini , A. Bemporad , D. Telloni , D. Gardiol , F. Frassati , I. Bizzarri , C. Taricco

We have studied low-frequency (45 - 410 MHz) type III solar radio bursts observed using the e-CALLISTO spectrometer located at Gauribidanur radio observatory, India during 2013 - 2017. After inspecting the 1531 type III bursts we found that…

太阳与恒星天体物理 · 物理学 2021-06-22 Mahender Aroori , K. Sasikumar Raja , R. Ramesh , Vemareddy Panditi , Christian Monstein , Yellaiah Ganji

We report observations of type III radio bursts at decimeter wavelengths (type IIIdm bursts) -- signatures of suprathermal electron beams propagating in the low corona -- using the new technique of radio dynamic imaging spectroscopy…

太阳与恒星天体物理 · 物理学 2015-06-12 Bin Chen , Timothy S. Bastian , Stephen M. White , Dale E. Gary , Richard A. Perley , Michael P. Rupen , Brent R. Carlson

The Sun is the source of different types of radio bursts that are associated with solar flares, for example. Among the most frequently observed phenomena are type III solar bursts. Their radio images at low frequencies (below 100 MHz) are…

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

A GOES M1.9 flare took place in active region AR 11153 on February 9,2011. With the resolution of 200 kHz and a time cadence of 80 ms, the reverse-drifting (RS) type III bursts, intermittent sequence of type U bursts, drifting pulsation…

太阳与恒星天体物理 · 物理学 2022-01-05 Guannan Gao , Qiangwei Cai , Shaojie Guo , Min Wang

Solar radio type III bursts are believed to be the most sensitive signature of near-relativistic electron beam propagation in the corona. A solar radio type IIIb-III pair burst with fine frequency structures, observed by the Low Frequency…

太阳与恒星天体物理 · 物理学 2018-04-11 Xingyao Chen , Eduard P. Kontar , Sijie Yu , Yihua Yan , Jing Huang , Baolin Tan

A new multichannel spectrometer, Phoenix-3, is in operation having capabilities to observe solar flare radio emissions in the 0.1 - 5 GHz range at an unprecedented spectral resolution of 61.0 kHz with high sensitivity. The present setup for…

太阳与恒星天体物理 · 物理学 2015-05-14 Arnold O. Benz , Christian Monstein , Michael Beverland , Hansueli Meyer , Bruno Stuber

The radio emission during 201 X-ray selected solar flares was surveyed from 100 MHz to 4 GHz with the Phoenix-2 spectrometer of ETH Zurich. The selection includes all RHESSI flares larger than C5.0 jointly observed from launch until June…

天体物理学 · 物理学 2009-11-10 Arnold O. Benz , Paolo Grigis , Andre Csillagy , Pascal Saint-Hilaire

We discuss properties of type III bursts which change sign of their drift rate from negative to positive and vice versa. Moreover such bursts may change sign of their drift rates more than once. These specific type III bursts were observed…

Solar microwave type III pair burst is composed of normal and reverse-sloped (RS) burst branches with oppositely fast frequency drifts. It is the most sensitive signature of the primary energy release and electron accelerations in flares.…

太阳与恒星天体物理 · 物理学 2016-03-16 Baolin Tan , Hana Meszarosova , Marian Karlicky , Guangli Huang , Chengming Tan

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

New results in the study of solar type III bursts observed with the UTR-2 radio telescope are presented. The main feature of these bursts is a high-frequency cut-off. The solar activity manifestation was connected with the emergency of a…

太阳与恒星天体物理 · 物理学 2018-12-19 A. A. Stanislavsky

Type III radio bursts are the result of plasma emission from mildly relativistic electron beams propagating from the low solar corona into the heliosphere where they can eventually be detected in situ if they align with the location of a…

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

A decay of Type III burst into two Type III bursts was registered during solar observations by GURT and URAN-2 radio telescopes on April 18, 2017. Such phenomenon was observed for the first time. Newborn Type III bursts have drift rates…

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

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

We present a study of decimetric radio activity, using the first high time cadence (0.5 s) images from the ${\textit{Giant Meterwave Radio Telescope}}$ (${\textit{GMRT}}$) at 610 MHz, associated with ${\textit{GOES}}$ C1.4 and M1.0 class…

太阳与恒星天体物理 · 物理学 2018-08-08 Susanta Kumar Bisoi , H. S. Sawant , P. Janardhan , Y. Yan , L. Chen , Arun Kumar Awasthi , Shweta Srivastava , G. Gao
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