Solar radio bursts with spectral fine structures in preflares

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00444992" target="_blank" >RIV/67985815:_____/15:00444992 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0004-637X/799/1/30" target="_blank" >http://dx.doi.org/10.1088/0004-637X/799/1/30</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0004-637X/799/1/30" target="_blank" >10.1088/0004-637X/799/1/30</a>

Result language

angličtina

Original language name

Solar radio bursts with spectral fine structures in preflares

Original language description

This work presents the characteristics of microwave spectral fine structures as preflare activities of four solar flares observed by the Ond. rejov radio spectrograph in the frequency range of 0.8-2.0 GHz. We found that these microwave bursts which occurred 1-4 minutes before the onset of flares have spectral fine structures with relatively weak intensities and very short timescales. They include microwave quasi-periodic pulsations with very short periods of 0.1-0.3 s and dot bursts with millisecond timescales and narrow frequency bandwidths. Accompanying these microwave bursts are filament motions, plasma ejection or loop brightening in the EUV imaging observations, and non-thermal hard X-ray emission enhancements observed by RHESSI. These facts may reveal certain independent, non-thermal energy releasing processes and particle acceleration before the onset of solar flares. They may help us to understand the nature of solar flares and to predict their occurrence.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

—

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Volume of the periodical

799

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

"30/1"-"30/13"

UT code for WoS article

000348214500029

EID of the result in the Scopus database

—