A Physical Explanation on Solar Microwave Zebra Pattern with the Current-carrying Plasma Loop Model

Abstract

Microwave zebra pattern structure is an intriguing fine structure on the dynamic spectra of solar type IV radio burst. Up to now, there isn't a perfect physical model for the origin of the solar microwave zebra pattern. Recently, Ledenev, Yan and Fu (2006) put forward an interference mechanism to explain the features of microwave zebra patterns in solar continuum events. This model needs a structure with a multitude of discrete narrow-band sources of small size. Based on the model of current-carrying plasma loop and the theory of tearing mode instability, we proposed that the above structure does exist and may provide the main conditions for the interference mechanism. With this model, we may explain the frequency upper limit, the formation of the parallel and equidistant stripes, the superfine structure and intermediate frequency drift rate of the zebra stripes. If this explanation is valid, the zebra pattern structures can reveal some information of the motion and the inner structures of the coronal plasma loops.

8 pages, 5 figures, Journal: Astrophysics and Space Sciences

References in corpus (1)

• Particle Acceleration in an Evolving Network of Unstable Current Sheets

Cited by in corpus (11)

• Spatially and Spectrally Resolved Observations of a Zebra Pattern in Solar Decimetric Radio Burst
• Microwave Zebra Pattern Structures in the X2.2 Solar Flare on Feb 15, 2011
• Statistics and Classification of the Microwave Zebra Patterns Associated with Solar Flares
• Temperature dependent growth rates of the upper-hybrid waves and solar radio zebra patterns
• PIC Simulation of Double Plasma Resonance and Zebra Pattern of Solar Radio Bursts
• A Very Small and Super Strong Zebra Pattern Burst at the Beginning of a Solar Flare
• Brightness Temperature of Radio Zebras and Wave Energy Densities in Their Sources
• Interferometric imaging, and beam-formed study of a moving Type IV Radio burst with LOFAR
• Growth Rates of the Upper-hybrid Waves for Power-law and Kappa Distributions with a Loss-cone Anisotropy
• Detecting fast-variation pulsations in solar hard X-ray and radio emissions
• Zebra stripes with high gyro-harmonic numbers