Journal article
First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype
D Oberoi, LD Matthews, IH Cairns, D Emrich, V Lobzin, CJ Lonsdale, EH Morgan, T Prabu, H Vedantham, RB Wayth, A Williams, C Williams, SM White, G Allen, W Arcus, D Barnes, L Benkevitch, G Bernardi, JD Bowman, FH Briggs Show all
Astrophysical Journal Letters | Published : 2011
Abstract
We present the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array, observed on 2010 March 27. Our observations span the instantaneous frequency band 170.9-201.6 MHz. Though our observing period is characterized as a period of "low" to "medium" activity, one broadband emission feature and numerous short-lived, narrowband, non-thermal emission features are evident. Our data represent a significant advance in low radio frequency solar imaging, enabling us to follow the spatial, spectral, and temporal evolution of events simultaneously and in unprecedented detail. The rich variety of features seen here reaffirms the coronal diagnostic capabi..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
This work uses data obtained from the Murchison Radioastronomy Observatory (MRO), jointly funded by the Commonwealth Government of Australia and Western Australian State government. The MRO is managed by the CSIRO, who also provides operational support to the MWA. We acknowledge the Wajarri Yamatji people as the traditional owners of the Observatory site. Support came from the U.S. National Science Foundation (grants AST-0457585 and PHY-0835713), the Australian Research Council (grants LE0775621 and LE0882938), the U.S. Air Force Office of Scientific Research (grant FA9550-0510247), the National Collaborative Infrastructure Strategy, funded by the Australian federal government via Astronomy Australia Limited, the Smithsonian Astrophysical Observatory, the MIT School of Science, the Raman Research Institute, The Australian National University, iVEC, the Initiative in Innovative Computing and NVIDIA sponsored Center for Excellence at Harvard, and the International Centre for Radio Astronomy Research, a Joint Venture of Curtin University, and The University of Western Australia funded by the Western Australian State government.