microwave emission

flux

Signatures of Confined and Eruptive Solar Flares in Microwave Spectra by E. W. Cliver et al.

January 6, 2026

Solar flares are generally divided into two classes: eruptive flares (with associated coronal mass ejections; CMEs, see previous CME nuggets by CESRA) and confined flares that lack CMEs. Because eruptive flares are the principal source of major space weather effects at Earth, relatively little attention was paid to confined flares until the great sunspot group of October 2014, designated NOAA 12192, passed across the solar disk giving rise to 35 […]

Generation of Series of Meter/Decimeter III type Bursts During Thermal Phase of Solar Flare by Meshalkina and Altyntsev

October 22, 2024

It has been established that decimeter type III bursts are generated in the upper corona by electron beams. However, many questions remain about their sources to this day. Some were associated with the jets generated by regular solar flares, but most were found to be associated with weak energy release events. The purpose of this work is to determine the relationship of meter and decimeter III type bursts with the […]

Solar Microwave Polarization Observed by the Newest and Oldest Solar Radio Telescopes by Masumi Shimojo

May 1, 2024

Polarization, regardless of wavelength, is one of the key observables for understanding the solar atmosphere because it provides information about magnetic fields, and microwave polarization is also one of them. It can reveal magnetism in the chromosphere, transition region, and corona from the microwave polarization dependencies of opacity and emissivity related to magnetic fields. Although observing solar polarization in the microwave range is not easy, it has a long history […]

Spectroscopic Imaging of the Sun with MeerKAT: Opening a New Frontier in Solar Physics by Kansabanik et al.

April 10, 2024

Since the discovery of solar radio emission in the late 1940s, the Sun has been studied in great detail across a wide range of frequencies from a few tens of kHz to several hundreds of GHz. Solar radio emissions provide several unique diagnostics of the solar corona, which are otherwise simply inaccessible. Despite this long history of observations and studies, the Sun still harbors several mysteries. Improved observations from the […]

The physics of solar spectral imaging observations in dm-cm wavelengths and space weather by Tan et al.

January 17, 2024

Recent years, several new generation solar radio telescopes operating in the centimeter decimeter (dm-cm) wavelengths have emerged in the world, including the Mingantu Spectral Radioheliograph (MUSER, 0.4-15GHz) (Yan et al. 2021), the Expanded Owens Valley Solar Array (EOVSA, 1-18GHz) (Gary et al. 2018), and the Siberian Radio Heliograph (SRH, 3-24GHz) (Altyntsev et al. 2020). Due to the fact that the solar radio emission in dm-cm wavelengths mainly originates from the […]