Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· References in the article
· Citations to the Article (11) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
On the Origin of the Zebra Pattern with Pulsating Superfine Structures on 21 April 2002
Authors:
Chen, Bin; Yan, Yihua
Affiliation:
AA(National Astronomical Observatories, Chinese Academy of Sciences; , Graduate University of Chinese Academy of Sciences), AB(National Astronomical Observatories, Chinese Academy of Sciences)
Publication:
Solar Physics, Volume 246, Issue 2, pp.431-443 (SoPh Homepage)
Publication Date:
12/2007
Origin:
SPRINGER
Keywords:
Solar flares, Radio emission, Zebra-pattern, Fine&nbsp, structure
DOI:
10.1007/s11207-007-9063-x
Bibliographic Code:
2007SoPh..246..431C

Abstract

Through the data around 3 GHz from the Radio Spectrometer in Huairou, Beijing, zebra-pattern structures from the 21 April 2002 event have been studied. Zebra stripes consist of periodically pulsating superfine structures in this event. An analysis of temporal profiles of intensities at multiple frequency channels shows that the Gaussian temporal profiles of pulse groups on zebra stripes are caused by drifting zebra stripes with Gaussian spectral profiles. The observed quasiperiodic pulsations with about 30 ms period have a peculiar feature of oscillation near a steady state, probably resulting from relaxation oscillations, which modulate the electron cyclotron maser emission that forms the zebra stripes during the process of wave particle interactions. All the main properties of the zebra stripes with pulsating superfine structures indicate that the double plasma resonance model might be the most suitable one, with the relaxation oscillations, to form the superfine structures. The model of LaBelle et al. ( Astrophys. J. 593, 1195, 2003) could not account for the observed properties of zebra-pattern structures in this event nor for most zebra-pattern structures occupying a wide frequency range, mainly because the allowable frequency range of the zebra-pattern structures in their model is too narrow to reproduce the observed zebras.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints