The First Low-frequency Radio Observations of the Solar Corona on 200 km Long Interferometer Baseline
Published in The Astrophysical Journal Letters, Volume 855, Issue 1, article id. L8, 4 pp., 2018
Authors: Mugundhan, V., Ramesh, R., Kathiravan, C., Gireesh, GVS., Kumari, A., Hariharan, K. & Indrajit, V. B.
The angular size of the smallest, compact radio source that can be observed in the solar atmosphere is one of the intriguing questions in low-frequency radio astronomy. This is important to understand density turbulence in the solar corona and the related angular broadening of the radio source sizes. We used a two-element interferometer with a baseline length of ≈200 km, operating at ≈53 MHz to infer the above limit. Our results indicate that radio sources of angular size ≤15″ exist in the solar corona, where radio emission at the above frequency also originates.
Recommended citation: Mugundhan, V., Ramesh, R., Kathiravan, C., Gireesh, G.V.S, Kumari, A., Hariharan, K., Indrajit, V. B., “The First Low-frequency Radio Observations of the Solar Corona on ≈200 km Long Interferometer Baseline”, The Astrophysical Journal, vol. 855, no. 1, 2018. doi:10.3847/2041-8213/aaaf64.