Hostname: page-component-76fb5796d-vvkck Total loading time: 0 Render date: 2024-04-26T07:42:25.529Z Has data issue: false hasContentIssue false
  • English
  • Français

Observations of Waves and Oscillations in the Solar Magnetic Fine Structure

Published online by Cambridge University Press:  12 April 2016

B. Fleck ,
F.-L. Deubner  and
W. Schmidt
B. Fleck
Affiliation:
Institut für Astronomie und Astrophysik der Universität Würzburg, Am Hubland, 8700 Würzburg, F.R. Germany
F.-L. Deubner
Affiliation:
Institut für Astronomie und Astrophysik der Universität Würzburg, Am Hubland, 8700 Würzburg, F.R. Germany
W. Schmidt
Affiliation:
Kiepenheuer-Institut für Sonnenphysik, Schöneckstraße 6, 7800 Freiburg, F.R. Germany

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We study the oscillatory behaviour of small-scale magnetic flux-tube concentrations and their immediate surroundings by analysing high spatial resolution time series of spectra of four Zeeman sensitive lines (Fe I 5247.1, Cr I 5247.6, Fe I 5250.2, Fe I 5250.7) taken simultaneously in left-hand and right-hand circularly polarized light with the Echelle spectrograph at the Vacuum Tower Telescope in Izaña, Tenerife. The velocity field inside the magnetic elements is dominated by the 5-min oscillations which also show up as periodic variations in the relative amplitude asymmetry of the Stokes V profiles. In other parameters as for instance the Stokes V peak separation we cannot detect an oscillatory component. Neither the magnetic line ratio nor the thermal line ratio is affected by the 5-min oscillations, although the latter reveals remarkable spatiotemporal variations.

Type
Session 9. Convections and Oscillation in Active Regions
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 522 - 525
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Fleck, B.: 1991, Rev. Mod. Astron. 4, 90 Google Scholar
Fleck, B., Deubner, F.-L.: 1991, in Mechanisms of Chromospheric and Coronal Heating, eds. Ulmschneider, P., Priest, E.R., Rosner, R., Springer p.19 Google Scholar
Giovanelli, R.G., Livingston, W.C., Harvey, J.W.: 1978, Solar Phys. 59, 49 Google Scholar
Schüssler, M.: 1990, in Solar Photosphere: Structure, Convection and Magnetic Fields, ed. Stenflo, J.O, IAU-Symp. No.138, Kiev, p.161 Google Scholar
Solanki, S.K.: 1986, Astron. Astrophys. 168, 311 p. 103 Google Scholar
Solanki, S.K., Roberts, B.: 1992, MNRAS 256, 13 Google Scholar
Spruit, H.C., Roberts, B.: 1983, Nature 304, 401 CrossRefGoogle Scholar
Stenflo, J.O.: 1989, Astron. Astrophys. Rev. 1, 3 CrossRefGoogle Scholar
Wiehr, E.: 1985, Astron. Astrophys. 149,217 Google Scholar