TEMPORAL SPECTRAL SHIFT AND POLARIZATION OF A BAND-SPLITTING SOLAR TYPE II RADIO BURST

In many type II solar radio bursts, the fundamental and/or the harmonic branches of the bursts can split into two almost parallel bands with similar spectral shapes and frequency drifts. However, the mechanisms accounting for this intriguing phenomenon remain elusive. In this study, we report a spec...

Full description

Saved in:
Bibliographic Details
Published inAstrophysical journal. Letters Vol. 793; no. 2; pp. 1 - 5
Main Authors Du, Guohui, Chen, Yao, Lv, Maoshui, Kong, Xiangliang, Feng, Shiwei, Guo, Fan, Li, Gang
Format Journal Article
LanguageEnglish
Published United States 01.10.2014
Subjects
Accounting
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Band spectra
Bands
EMISSION SPECTRA
LIMITING VALUES
MASS
POLARIZATION
Radio bursts
SHOCK WAVES
SOLAR RADIO BURSTS
Spectra
SPECTRAL SHIFT
Splitting
SUN
Online AccessGet full text

Cover

More Information
Summary:In many type II solar radio bursts, the fundamental and/or the harmonic branches of the bursts can split into two almost parallel bands with similar spectral shapes and frequency drifts. However, the mechanisms accounting for this intriguing phenomenon remain elusive. In this study, we report a special band-splitting type II event in which spectral features appear systematically earlier on the upper band (with higher frequencies) than on the lower band (with lower frequencies) by several seconds. Furthermore, the emissions carried by the splitting band are moderately polarized with the left-hand polarized signals stronger than the right-hand ones. The polarization degree varies in a range of -0.3 to -0.6. These novel observational findings provide important constraints on the underlying physical mechanisms of band-splitting of type II radio bursts.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2041-8213
2041-8205
2041-8213
DOI:10.1088/2041-8205/793/2/L39