@article{a03098e3c9104b05a016950637666d35,
title = "Imaging spectroscopy of solar radio burst fine structures",
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.",
author = "Kontar, {E. P.} and Sijie Yu and Kuznetsov, {A. A.} and Emslie, {A. G.} and B. Alcock and Jeffrey, {N. L.S.} and Melnik, {V. N.} and Bian, {N. H.} and P. Subramanian",
note = "Funding Information: E.P.K., N.L.S.J. and N.H.B. were supported by a STFC consolidated grant ST/L000741/1. A.G.E. was supported by grant NNX10AT78G from NASA{\textquoteright}s Goddard Space Flight Center and by the National Aeronautics and Space Administration Grant NNX17AI16G, issued through the Office of Heliophysics. A.A.K. was supported in part by the RFBR grant 15-02-03717. B.A. was supported by a STFC studentship grant. The work has benefited from a Marie Curie International Research Staff Exchange Scheme{\textquoteleft}Radiosun{\textquoteright} (PEOPLE-2011-IRSES-295272) and an international team grant (http://www.issibern.ch/ teams/lofar/) from ISSI Bern, Switzerland. This paper is based (in part) on data obtained with the International LOFAR25 Telescope (ILT). LOFAR is the Low Frequency Array designed and constructed by ASTRON. It has facilities in several countries, that are owned by various parties (each with their own funding sources), and that are collectively operated by the ILT foundation under a joint scientific policy. The authors are thankful to the SDO/AIA team for the data. Publisher Copyright: {\textcopyright} 2017 The Author(s).",
year = "2017",
month = dec,
day = "1",
doi = "10.1038/s41467-017-01307-8",
language = "English (US)",
volume = "8",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}