Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-02-05T13:47:27.067Z Has data issue: false hasContentIssue false
  • English
  • Français

On the structure of the magnetic field of sunspots

Published online by Cambridge University Press:  14 August 2015

E. I. Mogilevsky ,
L. B. Demkina ,
B. A. Ioshpa  and
V. N. Obridko
E. I. Mogilevsky
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio-Wave Propagation of the USSR Academy of Sciences, Moscow
L. B. Demkina
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio-Wave Propagation of the USSR Academy of Sciences, Moscow
B. A. Ioshpa
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio-Wave Propagation of the USSR Academy of Sciences, Moscow
V. N. Obridko
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio-Wave Propagation of the USSR Academy of Sciences, Moscow

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.

The model of the magnetic field of sunspots, taking account of fine structure of magnetic field in solar plasma, is considered. Small-scale subgranules with their own field form magnetic filaments in the external current-free field. The filaments are vertical in the umbra, while in the penumbra they run along the surface with sharp bends. In a number of spot umbra the relation between Doppler velocity and the field is established on polarized spectrograms. The π-component splitting in umbra is interpreted as a result of a weak background magnetic-field existence together with a large field of magnetic filaments. Spectrographic definition of the magnetic field in spot umbra is accomplished on the effect of magnetic-lines intensification and directly on spectrograms of low-excitation (Fe I, Ti I) and high-excitation (Fe II) lines. Magnetic field measured in low-excitation lines exceeds twice the field value obtained in high-excitation lines. This result has been considered in the light of the proposed model of sunspot field.

Type
Part III: Optical Structure of an Active Region
Information
Symposium - International Astronomical Union , Volume 35: Structure and Development of Solar Active Regions , 1968 , pp. 215 - 229
Copyright
Copyright © Reidel 1968 

References

Bojarchuk, A. A., Efimov, J.S., Stepanov, V.S. (1960) Astron. J., 37, 812.Google Scholar
Bumba, V. (1962) Bull. astr. Inst. Csl., 13, 42.Google Scholar
Chistjakov, V.F. (1967) Private communication.Google Scholar
Fricke, K., Elsässer, H. (1965) Z. Astrophys., 63, 35.Google Scholar
Kadomtzev, B. A. (1962) Nuclear Fusion, 3, 269.Google Scholar
Kolpakov, L. E. (1966) Solnechnie dannie, 9, 78.Google Scholar
Kuklin, G. V. (1966) The Results of the Observations and Investigations in the Period of the IQSY, 1, 16.Google Scholar
Makita, N. (1963) Publ. astron. Soc. Japan, 15, 145.Google Scholar
Mogilevsky, E.I., Shelting, B.D. (1966) Proc. of the Meeting on Solar Magnetic Fields and High Resolution Spectroscopy, Firenze, Ed. by Barbera, G., p. 222.Google Scholar
Mogilevsky, E.I., Shelting, B.D. (1968) Solar Phys., 4, in press.Google Scholar
Neuringer, J.L., Rosenzweig, E.R. (1967) Phys. of Fluids, 7, 1927.CrossRefGoogle Scholar
Rachkovsky, D.N. (1962) Izv. Crimean Obs., 27, 148.Google Scholar
Severny, A. B. (1959) Astr. Zu., 36, 208.Google Scholar
Severny, A.B. (1964) Space Sci. Rev., 3, 2.Google Scholar
Severny, A.B. (1965) Izv. Crimean Obs., 33, 3.Google Scholar
Severny, A.B. (1967) Izv. Crimean Obs., 36, 22.Google Scholar
Syrovatsky, S.I., Zhugzhda, Yu.D. (1967) ‘The Oscillatory Convection of the Conductive Gas in the Strong Magnetic Fields’. Preprint, No. 15, Phys. Inst. Ac. Sci., U.S.S.R., Moscow.Google Scholar
Vassilyeva, G.Y. (1963) Izvestija GAO (Pulkovo), 23, No. 171, 3.Google Scholar
Zhulin, I. A., Ioshpa, B.A., Mogilevsky, E.I., Obridko, V.N. (1966) in Proc. of the Meeting on Solar Magnetic Fields and High Resolution Spectroscopy, Firenze, Ed. by Barbera, G., p. 155.Google Scholar
Zwaan, C. (1965) Recherches astron. Obs. Utrecht, 17.Google Scholar