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Solar 5-min Oscillations at 2.23 μm

Published online by Cambridge University Press:  12 April 2016

Torben Leifsen
Torben Leifsen*
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029, Blindern, N-0315 Oslo, Norway

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Large amplitude infrared 2.23 μm solar intensity oscillations were detected in photometer observations obtained at Oslo Solar Observatory in 1987 and 1988. Five wavelength regions ranging from 0.67 μm to 2.23 μm and 7 circular entrance apertures ranging from 0.5 to 4.3 arc min were observed simultaneously at all wavelengths with the same detector. The 2.23 μm region showed remarkably higher amplitudes than the other 4 wavelength-regions. The observed power was concentrated to the 2.5 - 3.5 mHz region suggesting that we observe the well known 5 min oscillations (Leifsen and Maltby, 1990).

Type
I. Setting the stage: Sun, Stars Galaxies and the Universe
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 97 - 99
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

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