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The Magnetic Field in the Inner 70 Parsecs of the Milky Way

Published online by Cambridge University Press:  19 July 2016

Mark Morris
Mark Morris*
Affiliation:
Department of Astronomy University of California, Los Angeles Los Angeles, CA 90024 USA

Abstract

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Existing radiofrequency data on the center of the Galaxy are used to defend the hypothesis that the magnetic field within a radius of at least 70 pc of the nucleus has a poloidal geometry, is relatively uniform in strength, and is very strong relative to extended fields measured elsewhere in the Galaxy, having a flux density greater than or about a milligauss. The implications of this strong, pervasive field are: 1) that a strong ring current is present at radii beyond 70 pc, and 2) that the dynamics of molecular clouds in the Galactic center are significantly affected by, though probably not dominated by, the magnetic field. At radii within 5 pc, far-IR polarization data suggest a substantial deviation of the magnetic field from a poloidal geometry, at least within the gas and dust layer. There, the coupling of the field to the rapidly orbiting gas near the nucleus is presumably responsible for this local distortion of the larger-scale field geometry.

Type
7. Magnetic Fields in Galactic Nuclei
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 361 - 368
Copyright
Copyright © Kluwer 1990 

References

Aitken, D.K. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 457–464.CrossRefGoogle Scholar
Bally, J. and Yusef-Zadeh, F. (1989) Ap.J. , 336, 173.Google Scholar
Bally, J., Yusef-Zadeh, F. and Hollis, J.M. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Academic Publishers, Dordrecht, pp. 189–194.Google Scholar
Genzel, R. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 393–406.Google Scholar
Gusten, R. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 89–106.Google Scholar
Heyvaerts, J., Norman, C. and Pudritz, R.E. (1988) Ap.J. , 330, 718.Google Scholar
Hildebrand, R.H., Novak, G., Platt, S.R., Gonatos, D., Wu, X., Davidson, J. and Werner, M.W. (1990) in preparation.Google Scholar
Inoue, M., Fomalont, E., Tsuboi, M., Yusef-Zadeh, F., Morris, M., Tabara, H. and Kato, T. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Academic Publ., Dordrecht, pp. 269–275.Google Scholar
Lesch, H., Crusius, A., Schlickeiser, R. and Wielebinski, R. (1989) in these proceedings.Google Scholar
Liszt, H.S. (1985) Ap.J. (Letters) , 239, L65.Google Scholar
Morris, M. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 171–177.Google Scholar
Morris, M. and Yusef-Zadeh, F. (1985), Astron. J. , 90, 2511.Google Scholar
Morris, M. and Yusef-Zadeh, F. (1989) Ap.J. , 343, pp. 703–712.Google Scholar
Sanders, R. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 77–87.Google Scholar
Shibata, K. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 313–317.Google Scholar
Shu, F.H., Adams, F.C. and Lizano, S. (1987) Ann. Rev. Astron. Astrophys. , 25, 23.Google Scholar
Sofue, Y. (1985) Pub. Astr. Soc. Japan , 37, 697.Google Scholar
Sofue, Y. (1989) in these proceedings.Google Scholar
Sofue, Y. and Handa, T. (1984) Nature , 310, 568.Google Scholar
Tsuboi, M., Inoue, M., Handa, T., Inatani, J. and Ukita, (1989) in these proceedings.Google Scholar
Tsuboi, M., Inoue, M., Handa, T., Tabara, H., Kato, T., Sofue, Y. and Kaifu, N. (1986) Astron. J. , 92, 818.Google Scholar
Uchida, K., Morris, M. and Serabyn, E. (1989) Ap.J. , in press.Google Scholar
Uchida, Y., Shibata, K. and Sofue, Y. (1985) Nature , 317, 699.Google Scholar
Umemura, S., Iki, K., Shibata, K. and Sofue, Y. (1988) Pub. Astr. Soc. Japan. , 40, 25.Google Scholar
Watson, M.G., Willingale, R., Grindlay, J.E. and Hertz, P. (1981), Ap.J. , 250, 142.Google Scholar
Werner, M.W., Davidson, J.A., Morris, M., Novak, G., Platt, S.R., and Hildebrand, R.H. (1988) Ap.J. , 333, 729.CrossRefGoogle Scholar
Yusef-Zadeh, F. (1989) in Morris, M. (ed.), The Center of the Galaxy, Kluwer Acad., Dordrecht, pp. 243–263.CrossRefGoogle Scholar
Yusef-Zadeh, F. and Morris, M. (1987a) Ap.J. , 322, 721.Google Scholar
Yusef-Zadeh, F. and Morris, M. (1987b) Ap.J. , 320, 545.Google Scholar
Yusef-Zadeh, F. and Morris, M. (1987c) Astron. J. , 94, 1128.CrossRefGoogle Scholar
Yusef-Zadeh, F. and Morris, M. (1988) Ap.J. , 329, 729.Google Scholar
Yusef-Zadeh, F., Morris, M. and Chance, D. (1984) Nature , 310, 557.Google Scholar
Yusef-Zadeh, F., Morris, M., Lasenby, A., Seiradakis, J. and Wielebinski, R. (1989) in these proceedings.Google Scholar
Yusef-Zadeh, F., Morris, M., Slee, O.B., and Nelson, G.J. (1986) Ap.J. , 310, 689.Google Scholar