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Solar 5-minute Oscillations at 2.23 μm

Published online by Cambridge University Press:  03 August 2017

Torben Leifsen
Torben Leifsen*
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, P. O. Box 1029, Blindern N-0315, Oslo 3, Norway*

Abstract

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Large amplitude solar 5-min intensity oscillations have recently been detected at 2.23 μm using broad band (650 Å FWHM) photometry (Leifsen and Maltby, 1990). Large intensity amplitudes in a broad range in the near infrared was unexpected, and several questions concerning the source of the high amplitudes were raised. In an attempt to study the nature of these oscillations, time series of spectra have been obtained with the Fourier Transform Spectrometer (FTS) of the McMath telescope at National Solar Observatory at Kitt Peak. We present preliminary results from a 10 day long run in May 1991 in support for the suggestion that the results may be useful in both helio- and asteroseismological investigations.

Keywords

infrared: starsstars: oscillationsSun: oscillations
Type
Part 3: Infrared Perspectives on Atmospheric Dynamics
Information
Symposium - International Astronomical Union , Volume 154: Infrared Solar Physics , 1994 , pp. 271 - 276
Copyright
Copyright © Kluwer 1994 

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