First Spectroscopic Imaging Observations of the Sun at Low Radio Frequencies with the Murchison Widefield Array Prototype
Access Status
Open access
Authors
Oberoi, D.
Matthews, L.
Cairns, I.
Emrich, David
Lobzin, V.
Lonsdale, C.
Morgan, E.
Prabu, T.
Vedantham, H.
Wayth, Randall
Williams, A.
Williams, C.
White, S.
Allen, G.
Arcus, Wayne
Barnes, D.
Benkevitch, L.
Bernardi, G.
Bowman, J.
Briggs, F.
Bunton, J.
Burns, S.
Cappallo, R.
Clark, M.
Corey, B.
Dawson, M.
DeBoer, D.
De Gans, A.
DeSouza, L.
Derome, M.
Edgar, R.
Elton, T.
Goeke, R.
Gopalakrishna, M.
Greenhill, L.
Hazelton, B.
Herne, David
Hewitt, J.
Kamini, P.
Kaplan, D.
Kasper, J.
Kennedy, R.
Kincaid, B.
Kocz, J.
Koeing, R.
Kowald, E.
Lynch, Mervyn
Madhavi, S.
McWhirter, S.
Mitchell, D.
Morales, M.
Ng, A.
Ord, Stephen
Pathikulangara, J.
Rogers, A.
Roshi, A.
Salah, J.
Sault, R.
Schinckel, A.
Udaya Shankar, N.
Srivani, K.
Stevens, J.
Subrahmanyan, R.
Thakkar, D.
Tingay, Steven
Tuthill, J.
Vaccarella, A.
Waterson, Mark
Webster, R.
Whitney, A.
Date
2011Type
Journal Article
Metadata
Show full item recordCitation
Oberoi, D. and Matthews, L. and Cairns, I. and Emrich, D. and Lobzin, V. and Lonsdale, C. and Morgan, E. et al. 2011. First Spectroscopic Imaging Observations of the Sun at Low Radio Frequencies with the Murchison Widefield Array Prototype. The Astrophysical Journal Letters. 728 (2): L27.
Source Title
The Astrophysical Journal Letters
ISSN
School
Curtin Institute of Radio Astronomy (Physics)
Collection
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 capability of low radio frequency emission and provides an early glimpse of the nature of radio observations that will become available as the next generation of low-frequency radio interferometers come online over the next few years.
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