Kontar, E.P. , Yu, S., Kuznetsov, A.A., Emslie, A.G., Alcock, B. , Jeffrey, N.L.S. , Melnik, V.N., Bian, N.H. and Subramanian, P. (2017) Imaging spectroscopy of solar radio burst fine structures. Nature Communications, 8, 1515. (doi: 10.1038/s41467-017-01307-8) (PMID:29142220) (PMCID:PMC5688146)
|
Text
140483.pdf - Published Version Available under License Creative Commons Attribution. 1MB |
Abstract
Solar radio observations provide a unique diagnostic of the outer solar atmosphere. However, the inhomogeneous turbulent corona strongly affects the propagation of the emitted radio waves, so decoupling the intrinsic properties of the emitting source from the effects of radio wave propagation has long been a major challenge in solar physics. Here we report quantitative spatial and frequency characterization of solar radio burst fine structures observed with the Low Frequency Array, an instrument with high-time resolution that also permits imaging at scales much shorter than those corresponding to radio wave propagation in the corona. The observations demonstrate that radio wave propagation effects, and not the properties of the intrinsic emission source, dominate the observed spatial characteristics of radio burst images. These results permit more accurate estimates of source brightness temperatures, and open opportunities for quantitative study of the mechanisms that create the turbulent coronal medium through which the emitted radiation propagates.
| Item Type: | Articles |
|---|---|
| Additional Information: | A correction to this article is available at https://doi.org/10.1038/s41467-017-02464-6. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Kontar, Professor Eduard and Alcock, Benjamin and Jeffrey, Dr Natasha and Bian, Dr Nicolas Horace |
| Authors: | Kontar, E.P., Yu, S., Kuznetsov, A.A., Emslie, A.G., Alcock, B., Jeffrey, N.L.S., Melnik, V.N., Bian, N.H., and Subramanian, P. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Nature Communications |
| Publisher: | Nature Research |
| ISSN: | 2041-1723 |
| ISSN (Online): | 2041-1723 |
| Copyright Holders: | Copyright © 2017 The Authors |
| First Published: | First published in Nature Communications 8:1515 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Related URLs: |
University Staff: Request a correction | Enlighten Editors: Update this record
Funder and Project Information
Funder and Project Information