Abstract
Recent studies of the Galactic center environment have revealed a wealth of new thermal and nonthermal features with unusual characteristics. A system of nonthermal filamentary structures tracing magnetic field lines are found to extend over 200pc in the direction perpendicular to the Galactic plane. Ionized structures, like nonthermal features, appear filamentary and show forbidden velocity fields in the sense of Galactic rotation and large line widths. Faraday rotation characteristics and the flat spectral index distributions of the nonthermal filaments suggest a mixture of thermal and nonthermal gas. Furthermore, the relative spatial distributions of the magnetic structures with respect to those of the ionized and molecular gas suggest a physical interaction between these two systems. In spite of numerous questions concerning the origin of the large-scale organized magnetic structures, the mechanism by which particles are accelerated to relativistic energies, and the source or sources of heating the dust and gas, recent studies have been able to distinguish the inner 200pc of the nucleus from the disk of the Galaxy in at least two more respects: (1) the recognition that the magnetic field has a large-scale structure and is strong, uniform and dynamically important; and (2) the physics of interstellar matter may be dominated by the poloidal component of the magnetic field.
National Research Council Resident Research Associate
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Aitken, D.K., Roche, P.F., Bailey, J.A., Briggs, G.P., Hough, J.H. and Thomas, J.A. 1986, MNRAS, 218, 363.
Altenhoff, W.J., Downes, D., Pauls, T. and Schraml, J. 1978, Astr.Astrophys.Suppl., 35, 23.
Anantharamaiah, K.R. and Yusef-Zadeh, F. this volume.
Bally, J., Stark, A., Wilson, R. and Henkel, C. 1988, Ap.J., 324, 223.
Bally, J. and Yusef-Zadeh, F. 1989, Ap.J. (January 15 issue).
Bally, J., Yusef-Zadeh, F. and Hollis, J.M. this volume.
Benford, G. 1988, Ap.J. (in press).
Bernstein, I.B., and Kulsrud, R.M. 1965, Ap.J., 142, 479.
Brown, R.L. and Liszt, J.H. 1984, Ann. Rev. Astron. Astrophys., 22, 223.
Burn, B.F. 1966, Ap.J., 324, 223.
Chudnovsky, E.M., Field, G.B., Spergel, D.N. and Vilenkin, A. 1986, Phys.Rev.D., 34, 944.
Dent, W.A., Werner, M.W., Gatley, L, Hildebrand, R.H., Keene, J. and Whitcomb, S.E. 1982, spi The Galactic Center, eds. G.R. Reigler, R.D. Blandford, (New York:AIP), p33.
Drake, F. 1959, Astr.J., 64, 329.
Ekers, R., van Gorkom, J.H., Schwarz, U.J. and Goss, W.M. 1983, Astron.Astrophys., 122, 143.
Geballe, T.R. 1987, The Galactic Center, ed. D.C. Backer (New York:AIP), p39.
Geballe, T.R. this volume.
Geballe, T.R., Serabyn, E., and Yusef-Zadeh, F. 1989, in preparation.
Genzel, R., Stacy, G.J. and Townes, C.H. this volume.
Goss, W.M., Schwarz, U.J., Ekers, R.D. and van Gorkom, J.H. 1983, spi IAU Symposium 101, Supernova Remnants ans their X-ray Emission, eds. J. Danziger and P. Gorenstein, (Dordrecht:Reidel), p65.
Glisten, R. and Downes, D. 1980, Astron.Astrophys., 87, 6.
Heyvaerts, J., Norman, C. and Pudritz, R. 1988, Ap.J., (in press).
Inoue, M., Fomalont, E., Tsuboi, M., Yusef-Zadeh, F., Morris, M., Tabara, H. and Kato, T. this volume.
Inoue, M., Takahashi, T., Tabara, H, Kato, T. and Tsuboi, M. 1984, Pub.Astr.Soc. Japan., 36, 633.
Kapitzky, J.E. and Dent, W.A. 1974, Ap.J., 188, 27.
Kassim, N.E., Erickson, W.C. and LaRosa, T. 1987, spi The Galactic Center, ed. D.C. Backer (New York:AIP), p196.
Lasenby, J., Lasenby, A.N. and Yusef-Zadeh, F. this volume.
Liszt, H.S. 1985, Ap.J.(Letters), 239, L65.
Little, A.G. 1974, spi IAU Symposium 60, Galactic Radio Astronomy, ed. F.J. Kerr and S.C. Simonson III, (Dordrecht:Reidel), p491.
Mezger, P.G., Zylka, R., Salter, C.J., Wink, J.E., Chini, R. and Kreysa, E., this volume.
Mills, B.Y., and Drinkwater, M.J. 1984, J.Ap.Astr., 5, 43.
Morris, M. this volume.
Morris, M. and Yusef-Zadeh, F. 1985, Astron. J., 90, 2511.
Morris, M. and Yusef-Zadeh, F. 1988, submitted to Ap.J.
Morris, M. and Yusef-Zadeh, F. 1989, in preparation
Odenwald, S.F. this volume.
Okuda, H., Shibai, H., Matsuhara, H., Kobayashi, Y., Kaifu, N. et al. this volume.
Pauls, T., Downes, D., Mezger, P.G., Churchwell, E., 1976, Astron. Astrophys. 46, 407.
Pauls, T., Mezger, P.G., 1980, Astron. Astrophys., 85, 26.
Reich, W. this volume.
Reich, W., Sofue, Y. and Fürst, E. 1988, preprint.
Seiber, W. and Schlickeiser, R. 1982, Astron. Astrophys., 113, 314.
Seiradakis, J.H., Lasenby, A.N., Yusef-Zadeh, F., Wielebinski, R. and Klein, U. 1985, Nature, 317, 697.
Serabyn, E. and Glisten, R., 1987, Astron.Astrophys., 184, 183.
Shibata, K. and Uchida, Y. 1987, Publ. Astron.Soc. Japan, 39, 559.
Sofue, Y. and Fujimoto, M. 1987, Ap. J. (Letters), 319, L73.
Sofue, Y. and Handa, T. 1984, Nature, 310, 568.
Sofue, Y., Inoue, M., Handa, T., Tsuboi, M., Hirabayashi, H., Morimoto, M. Akabane, K., 1986, Publ. Astron. Soc. Japan, 38 475.
Sofue, Y., Reich, W., Inoue, M. and Seiradakis, J.H. 1987, Pub. Astr. Soc. Japan., 39, 95.
Steinberg, J.L. and Lequeux, J. 1963, Radio Astronomy, (McGraw Hill, New York), p193.
Tsuboi, M., Inoue, M., Handa, T., Tabara, H. and Kato, T., Sofue, Y. and Kaifu, N. 1986, Astron. J., 92, 818.
Vilenkin, A. 1985, Phys. Rep., 121, 263.
Werner, M.W. and Davidson, J. this volume
Whiteoak, J.B. and Gardner, F.F. 1973, Astrophys. Lett, 13, 205.
Wright, A.E. and Barlow, M.J. 1975, MNRAS, 170, 41.
Yusef-Zadeh, F., 1986, Ph.D Thesis, Columbia University.
Yusef-Zadeh, F. and Bally, J. 1989, in preparation.
Yusef-Zadeh, F., Morris, M. 1987a, Ap.J., 322, 721.
Yusef-Zadeh, F., Morris, M.. 1987b, Astron. J., 94, 1128.
Yusef-Zadeh, F., Morris, M.. 1987c, Ap. J., 320, 545.
Yusef-Zadeh, F., Morris, M.. 1988, Ap. J., 329, 729.
Yusef-Zadeh, F., Morris, M., Chance, D. 1984, Nature, 310, 557.
Yusef-Zadeh, F., Morris, M., Lasenby, A., Seiradakis, J.H., Wielebinski, R. and Klein, U. 1989, in preparation.
Yusef-Zadeh, F., Morris, M., Slee, O.B. and Nelson, G.J. 1986, Ap.J., 310, 689.
Yusef-Zadeh, F., Morris, M., and van Gorkom, J.H. 1987, in The Galactic Center, ed. D.C. Backer (New York:AIP), p190.
Yusef-Zadeh, F., Morris, M., and van Gorkom, J.H. this volume.
Yusef-Zadeh, F., Telesco, C. and Decher, R. this volume.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 IAU
About this paper
Cite this paper
Yusef-Zadeh, F. (1989). Filamentary Structures Near the Galactic Center. In: Morris, M. (eds) The Center of the Galaxy. International Astronomical Union Union Astronomique Internationale, vol 136. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2362-1_32
Download citation
DOI: https://doi.org/10.1007/978-94-009-2362-1_32
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-0222-3
Online ISBN: 978-94-009-2362-1
eBook Packages: Springer Book Archive