2011/05/04 by Bin Chen, T. S. Bastian, Timothy S. Bastian +2 · 61 citations
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Astrophysics #Extrapolation #Flare #Geomagnetism and Paleomagnetism Studies #Ionosphere and magnetosphere dynamics #Magnetic field #Physics #Radio frequency #Solar and Space Plasma Dynamics #Solar flare #Telecommunications #astro-ph.SR
paper · pdf · doi:10.1088/0004-637x/736/1/64
published in The Astrophysical Journal 736(1), 64 (IOP Publishing) · Accepted for publication in ApJ
arxiv created 2011/05/04 · openalex publication_date 2011/07/06 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present the first interferometric observation of a zebra-pattern radio burst with simultaneous high spectral (≈1 MHz) and high time (20 ms) resolution. The Frequency-Agile Solar Radiotelescope Subsystem Testbed (FST) and the Owens Valley Solar Array (OVSA) were used in parallel to observe the X1.5 flare on 2006 December 14. By using OVSA to calibrate the FST, the source position of the zebra pattern can be located on the solar disk. With the help of multi-wavelength observations and a nonlinear force-free field extrapolation, the zebra source is explored in relation to the magnetic field configuration. New constraints are placed on the source size and position as a function of frequency and time. We conclude that the zebra burst is consistent with a double-plasma resonance model in which the radio emission occurs in resonance layers where the upper-hybrid frequency is harmonically related to the electron cyclotron frequency in a coronal magnetic loop.