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Magnetic Fields in OH Maser Clouds

Published online by Cambridge University Press:  14 August 2015

R. D. Davies
R. D. Davies*
Affiliation:
University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire, United Kingdom

Abstract

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Observations of Class I OH maser sources show a range of features which are predicted on the basis of Zeeman splitting in a source magnetic field. Magnetic field strengths of 2 to 7 mG are derived for eight OH maser sources. The fields in all the clouds are directed in the sense of galactic rotation. A model of W3 OH is proposed which incorporates the magnetic field data. It is shown that no large amount of magnetic flux or angular momentum has been lost since the condensation from the interstellar medium began.

Type
Part 2: Galactic H ii Regions
Information
Symposium - International Astronomical Union , Volume 60: Galactic Radio Astronomy , 1974 , pp. 275 - 292
Copyright
Copyright © Reidel 1974 

References

Baldwin, J. E., Harris, C. S., and Ryle, M.: 1973, Nature 241, 38.Google Scholar
Bender, P. L.: 1967, Phys. Rev. Letters 18, 562.Google Scholar
Coles, W. A., Rumsey, V. H., and Welch, W. J.: 1968, Astrophys. J. Letters 154, L61.Google Scholar
Cook, A. H.: 1966, Nature 211, 503.Google Scholar
Cowling, T. G.: 1957, Magnetohydrodynamics, Interscience Publishers, New York, p. 110.Google Scholar
Culshaw, W. and Kanneland, J.: 1966, Phys. Rev. 145, 257.Google Scholar
Davies, R. D.: 1967, in van Woerden, H. (ed.), ‘Radio Astronomy and the Galactic System’, IAU Symp. 31, 82.Google Scholar
Davies, R. D., de Jager, G., and Verschuur, G.: 1966, Nature 209, 974.CrossRefGoogle Scholar
Davies, R. D., Booth, R. S., and Wilson, A. J.: 1974, in preparation.Google Scholar
Gardner, F. F., Ribes, J. C., and Goss, W. M.: 1970, Astrophys. Letters 7, 51.Google Scholar
Gardner, F. F., Whiteoak, J. B., and Morris, D.: 1967, Nature 214, 371 Google Scholar
Goldreich, P., Keeley, D. A., and Kwan, J. Y.: 1973, Astrophys. J. 179, 111.Google Scholar
Hall, L. M. and ter Haar, D.: 1973, Monthly Notices Roy. Astron. Soc. 162, 97.Google Scholar
Harvey, P. J., Booth, R. S., Davies, R. D., Whittet, D., and McLaughlin, W.: 1974, Monthly Notices Roy. Astron. Soc., in press.Google Scholar
Heer, C. V. and Graft, R. G.: 1965, Phys. Rev. 140, A1088.Google Scholar
Heer, C. V. and Settles, R. A.: 1967, J. Mol. Spectrosc. 23, 448.Google Scholar
Larson, R. B.: 1969, Monthly Notices Roy. Astron. Soc. 145, 271.CrossRefGoogle Scholar
Litvak, M. M.: 1969, Astrophys. J. 156, 471.CrossRefGoogle Scholar
Litvak, M. M.: 1971, Astrophys. J. 170, 71.Google Scholar
Litvak, M. M., Zuckerman, B., and Dickinson, D. F.: 1969, Astrophys. J. 156, 875.Google Scholar
Manchester, R. N.: 1972, Astrophys. J. 172, 43.Google Scholar
Mestel, L.: 1965, Quart. J. Roy. Astron. Soc. 6, 161 and 265.Google Scholar
Mestel, L.: 1972, in Schindler, P. (ed.), Cosmic Plasma Physics, Plenum Publishing Corporation, New York, p. 203.Google Scholar
Parker, D. A.: 1973, Monthly Notices Roy. Astron. Soc. 163, 41.CrossRefGoogle Scholar
Perkins, F., Gold, T., and Salpeter, E. E.: 1966, Astrophys. J. 145, 361.Google Scholar
Radford, H. E.: 1961, Phys. Rev. 122, 144.Google Scholar
Rydbeck, O. E. H., Kollberg, E., and Elldér, J.: 1970, Astrophys. J. Letters 161, L25.Google Scholar
Shklovskii, I. S.: 1969, Soviet Astron. 13, 1.Google Scholar
Spitzer, L.: 1962, Physics of Fully Ionized Gases, Interscience Publishers, New York.Google Scholar
Spitzer, L.: 1968, Stars and Stellar Systems 7, 1.Google Scholar
Tuwnes, C. H. and Schawlow, A. L.: 1956, Microwave Spectroscopy, McGraw-Hill, London.Google Scholar
Turner, B. E.: 1970, J. Roy. Astron. Soc. Can. 64, 221.Google Scholar
Verschuur, G. L.: 1971, Astrophys. J. 165, 651.Google Scholar
Wynn-Williams, C. G., Becklin, E. E., and Neugebauer, G.: 1972, Monthly Notices Roy. Astron. Soc. 160, 1.Google Scholar
Zuckerman, B., Yen, J. L., Gottlieb, C. A., and Palmer, P.: 1972, Astrophys. J. 177, 59.Google Scholar