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Title: Detection of Short-Period Coronal Oscillations during the Total Solar Eclipse of 24 October, 1995
Authors: Singh, J
Cowsik, R
Raveendran, A. V
Bagare, S. P
Saxena, A. K
Sundararaman, K
Krishan, V
Naidu, N
Samson, J. P. A
Gabriel, F
Keywords: Solar Corona;Total Solar Eclipse;Magnetosonic Modes;Flux
Issue Date: Feb-1997
Publisher: Springer
Citation: Solar Physics, Vol. 170, No. 2, pp. 235 - 252
Abstract: An experiment to search for short-period oscillations in the solar corona was conducted during the total solar eclipse of 1995 October 24 at Kalpi, India. The intensity in the continuum, centred around 5500 Å and with a passband having a half-width of 240 Å, was recorded at a counting rate of 20 Hz using a thermoelectric-liquid cooled photomultiplier. The power-spectrum analysis of the data reveals that most of the power is contained in 6 frequencies below 0.2 Hz. A least-square analysis gives the periods of the 6 frequency components to be 56.5, 19.5, 13.5, 8.0, 6.1, and 5.3 s. These oscillations are found to be sinusoidal, and their amplitudes are found to lie in the range inebreak 0.2–1.3% of the coronal brightness. Assuming these oscillations to be fast magnetosonic modes, the calculations indicate the availability of enough flux for the heating of the active regions in the solar corona.
Description: Restricted Access
ISSN: 0038-0938
Appears in Collections:IIAP Publications

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