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The Nature of the Galactic Center Arc

Published online by Cambridge University Press:  25 May 2016

E. Serabyn
E. Serabyn*
Affiliation:
Department of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125

Abstract

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Ever since the Galactic Center Arc was resolved into its component filaments a decade ago, it has been clear that its linear structure arises from the influence of a strong magnetic field. However, the origin and nature of the contributory phenomena have remained elusive. Since what is seen is synchrotron emission from relativistic particles, of prime interest is a knowledge of the acceleration mechanism involved. Interferometric imaging of the molecular gas in the vicinity of the Arc has now provided a tantalizing clue to the Arc's origin: molecular clumps coinciding with the endpoints of a number of the Arc's filaments point to these clumps as the source of the relativistic particles. This suggests that as dense molecular clumps course through the ambient magnetic field at the Galactic Center, magnetic energy is liberated in their leading layers via field reconnection, precipitating rapid acceleration of free charges to high energy.

Type
Chapter 3: What is the Nature of the Center of the Galaxy?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 263 - 269
Copyright
Copyright © Kluwer 1996 

References

Bally, J., Stark, A.A., Wilson, R.W., & Henkel, C. 1988, Ap. J. 324, 223.CrossRefGoogle Scholar
Güsten, R. 1989, in IAU Symp. 136, “The Center of the Galaxy”, ed. Morris, M. (Dordrecht: Kluwer), 89.CrossRefGoogle Scholar
Lasenby, J., Lasenby, A.N., & Yusef-Zadeh, F. 1989, Ap. J. 343, 177.CrossRefGoogle Scholar
Morris, M. 1994, in “The Nuclei of Normal Galaxies: Lessons from the Galactic Center”, eds. Genzel, R. & Harris, A. (Dordrecht: Kluwer).Google Scholar
Parker, E.N. 1979, Cosmical Magnetic Fields (Oxford: Clarendon Press).Google Scholar
Reich, W., 1990 in IAU Symp. No. 140, “Galactic and Intergalactic Magnetic Fields”, eds. Beck, R., Kronberg, P. and Wielebinski, R. (Dordrecht: Kluwer), 369.CrossRefGoogle Scholar
Seiradakis, J.H., Lasenby, A.N., Yusef-Zadeh, F., Wielebinski, R., & Klein, U. 1985, Nature 317, 697 CrossRefGoogle Scholar
Serabyn, E. & Güsten, R. 1991, Astr. and Ap. 242, 376.Google Scholar
Serabyn, E. & Morris, M. 1994, Ap.J. Lett. 424, L91.CrossRefGoogle Scholar
Sofue, Y., Murata, Y. & Reich, W. 1992, Publ. Ast. Soc. Japan , 44, 367.Google Scholar
Sofue, Y., Reich, W., Inoue, M., & Seiradakis, J.H. 1987, Publ. Ast. Soc. Japan 39, 95.Google Scholar
Tsuboi, M., Inoue, M., Handa, T., Tabara, H., Kato, T., Sofue, Y., & Kaifu, N. 1986, AJ, 92, 818.CrossRefGoogle Scholar
Yusef-Zadeh, F. & Morris, M. 1987, Astron. J. 94, 1178.CrossRefGoogle Scholar
Yusef-Zadeh, F., Morris, M., & Chance, D. 1984, Nature 310, 557.CrossRefGoogle Scholar