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Radio Astronomy Techniques of Observing Magnetic Fields: The Galaxy

Published online by Cambridge University Press:  19 July 2016

Richard Wielebinski
Richard Wielebinski*
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, W-5300 Bonn 1, FRG

Abstract

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Optical techniques were first used to detect magnetic fields in cosmic objects. Hale used the Zeeman effect to detect solar magnetic fields in 1908. Babcock extended the Zeeman technique to show the existence of magnetic fields in Ap stars in 1946. Optical polarization observations were made as early as 1920 by W.F. Meyer who observed the Hubble variable nebula NGC 2261. Polarization observations of the Andromeda nebula were made by Öhman in 1942. However at first the interpretation of these optical polarization observations was in terms of scattered light only. The theoretical work of Davis and Greenstein suggested that optical polarization could also be due to dust grains aligned in magnetic fields. Observations of Hiltner and Hall supported this interpretation. Extensive surveys of starlight polarization were made by many observers giving information about nearby magnetic fields in the Galaxy. Optical polarization observations of galaxies gave some information on the Magellanic Clouds and other nearby objects but due to lack of sensitivity progress was slow.

Type
7. Magnetic Fields in Galaxies: Observations
Information
Symposium - International Astronomical Union , Volume 157: The Cosmic Dynamo , 1993 , pp. 271 - 277
Copyright
Copyright © Kluwer 1993 

References

Anantharamiah, K.R., Pedlar, A., Ekers, R.D. and Goss, W.M.: 1991, MNRAS 249, 262 CrossRefGoogle Scholar
Behr, A.: 1959, Nachr. Akad. Göttingen 7 Google Scholar
Beuermann, K., Kanbach, G. and Berkhuijsen, E.: 1985, A&A 153, 17 Google Scholar
Bignell, R.C., Simard-Normandin, M. and Vallée, J.P.: 1988, ApJS 67, 279 Google Scholar
Bracewell, R.N., Cooper, B.F.C. and Cousins, T.E.: 1962, Nature 165, 1286 Google Scholar
Crutcher, R.M.: 1988, in Dickman, R. L. et al., ed(s)., Molecular Clouds in the Milky Way and External Galaxies , Springer: Berlin, p. 105 CrossRefGoogle Scholar
Crutcher, R.M. and Kazes, I.: 1983, A&A 125, L23 Google Scholar
Dombrovsky, V.A.: 1954, Dokl. Akad. Nauk UdSSR 94, 1021 Google Scholar
Fiebig, D. and Güsten, R.: 1989, A&A 214, 333 Google Scholar
Gardner, F.F. and Whiteoak, J.B.: 1962, Phys. Rev. Lett. 9, 197 Google Scholar
Hall, J.S.: 1949, Science 109, 166 Google Scholar
Haynes, R.F. et al.: 1992, A&A 264, 500 Google Scholar
Heiles, C.: 1988, ApJ 334, 321 Google Scholar
Heiles, C.: 1989, ApJ 336, 808 CrossRefGoogle Scholar
Heiles, C.: 1990, in Beck, R. et al., ed(s)., Proc. IAU Symp. 140, Galactic and Intergalactic Magnetic Fields , Kluwer: Dordrecht, p. 35 Google Scholar
Hiltner, W.A.: 1949, Science 109, 471 Google Scholar
Hiltner, W.A.: 1958, ApJ 128, 9 Google Scholar
Hoyle, F. and Ireland, J.G.: 1961, MNRAS 122, 462 Google Scholar
Junkes, N., Fürst, E. and Reich, W.: 1987, A&AS 69, 451 Google Scholar
Lyne, A.G. and Smith, F.G.: 1989, MNRAS 237, 533 Google Scholar
Manchester, R.N.: 1974, ApJ 188, 637 CrossRefGoogle Scholar
Mathewson, D.S. and Nicholls, D.C.: 1968, ApJ 154, L11 Google Scholar
Mathewson, D.S. and Ford, V.L.: 1970, Mem. R. Astron. Soc. 74, 139 Google Scholar
Mayer, C.H., McCullough, T.P. and Sloanaker, R.M.: 1957, ApJ 126, 468 CrossRefGoogle Scholar
Mayer, C.H., McCullough, T.P. and Sloanaker, R.M.: 1962, ApJ 135, 656 Google Scholar
McLeod, J.M., Vallée, J.P. and Broten, N.W.: 1988, A&AS 74, 63 Google Scholar
Moffat, A.T.: 1975, in Sandage, A. et al., ed(s)., Stars and Stellar Systems vol. 9, Galaxies and the Universe , Chicago Univ. Press: Chicago, p. 211 Google Scholar
Pacholczyk, A.G.: 1970, Radio Astrophysics , Freeman: San Francisco Google Scholar
Phillips, S. et al.: 1981, A&A 103, 405 Google Scholar
Rand, R.J. and Kulkarni, S.R.: 1989, ApJ 343, 760 Google Scholar
Seiradakis, J.H. et al.: 1989, A&AS 81, 291 Google Scholar
Shklovsky, I.S.: 1953, Dokl. Akad. Nauk UdSSR 90, 1983 Google Scholar
Simard-Normandin, M., Kronberg, P.P. and Button, S.: 1981, ApJS 45, 97 Google Scholar
Sofue, Y. and Fujimoto, M.: 1983, ApJ 265, 722 Google Scholar
Spoelstra, T. A. Th.: 1971, A&A 13, 237 Google Scholar
Spoelstra, T. A. Th.: 1984, A&A 135, 238 Google Scholar
Taylor, J.H. and Cordes, J.M.: 1992, NAIC Preprint No. 297 Google Scholar
Vallée, J.P.: 1991, ApJ 366, 450 Google Scholar
Vallée, J.P. and Kronberg, P.P.: 1973, Nature 246, 49 Google Scholar
Verschuur, G.L.: 1968, Phys. Rev. Lett. 21, 775 Google Scholar
Verschuur, G.L.: 1989, ApJ 339, 163 Google Scholar
Westerhout, G., Seeger, Ch.L., Brouw, W.N. and Tinbergen, J.: 1962, B.A.N. 16, 187 Google Scholar
Wielebinski, R., Shakeshaft, J.S. and Pauliny-Toth, I.I.K.: 1962, Observatory 82, 187 Google Scholar
Woltjer, L.: 1957, B.A.N. 13, 301 Google Scholar