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The study of velocity oscillations in the solar photosphere using the velocity substraction technique

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Abstract

A method of measurement of local line-of-sight velocities in the solar atmosphere by means of polarization optics is described. No spurious signals due to instrumental displacements of the spectrum arise with this method. The sensitivity of the method obtained is 0.3 m s-1, with a time constant τ = 5 s and input aperture 1.4″ × 4.5″. Some preliminary results of the assessment of spatial characteristics of 5-min oscillations are included. Data are given to illustrate a center-to-limb variation of the spectrum of 5-min oscillations.

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Authors and Affiliations

  1. Siberian Department, Siberian Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (SibIZMIR), USSR Academy of Sciences, P.O. Box 4, 33, Irkutsk, U.S.S.R.

    N. I. Kobanov

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  1. N. I. Kobanov
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Additional information

Proceedings of the 66th IAU Colloquium: Problems in Solar and Stellar Oscillations, held at the Crimean Astrophysical Observatory, U.S.S.R., 1–5 September, 1981.

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Kobanov, N.I. The study of velocity oscillations in the solar photosphere using the velocity substraction technique. Sol Phys 82, 237–243 (1983). https://doi.org/10.1007/BF00145566

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  • DOI: https://doi.org/10.1007/BF00145566

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