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

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

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...82..237k&link_type=abstract

(International Astronomical Union and Akademiia Nauk SSSR, Colloquium on Problems of Solar and Stellar Oscillations, 66th, Nauch

Physics

20

Photosphere, Solar Oscillations, Solar Velocity, Line Of Sight, Linear Polarization, Optical Polarization, Power Spectra, Solar Limb, Velocity Measurement

Scientific paper

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 1.4arcsec×4.5arcsec. 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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