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The Dynamics of the Galactic Bar

Published online by Cambridge University Press:  12 April 2016

Martin D. Weinberg
Martin D. Weinberg*
Affiliation:
Department of Physics & Astronomy, University of Massachusetts, Amherst, MA 01003

Extract

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The dynamics of formation and evolution of structure in barred galaxies is subtle and will require many and detailed observations to discriminate between the alternative hypotheses. Why should someone interested in such problems consider the Milky Way? In terms of data volume, our knowledge of the Milky Way is vast and the availability of detail is its major advantage. In principle, one can study morphological details such as orientations, strengths of asymmetries and kinematics details such as velocity field/pattern speeds using a wide variety of tracers. To illustrate, theorists have not converged on a single mechanism to explain bars (witness the instability vs. secular formation debate). It is possible that both operate in different regimes depending on internal or external influences: internally, triaxialities and misalignments in the bulge, spheroid or halo can apply torques and drive angular momentum waves which saturate to form a bar; and externally, satellite galaxies can exchange orbital angular momentum with its disturbance which has the similar effect. In short, if the Galaxy is indeed barred, it may hold clues to some of the detailed problems posed at this meeting.

Type
Part IX. The Galaxy as a Barred Spiral
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 516 - 528
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Athanassoula, E. 1989, in Proceedings of an International School and Workshop on Plasma Astrophysics, Vol. 1 (ESA), 341 Google Scholar
Athanassoula, E. 1992a, MNRAS, 259, 345 Google Scholar
Athanassoula, E. 1992b, MNRAS, 259, 328 Google Scholar
Bally, J., Stark, A.A., Wilson, R.W., & Henkel, C. 1988, ApJ, 324, 223 CrossRefGoogle Scholar
Binney, J. 1992, ARAA, 30 Google Scholar
Binney, J. 1993, in The Nuclei of Normal Galaxies: Lessons from the Galactic Center, Genzel, R. & Harris, A.I. (Kluwer), 75 Google Scholar
Binney, J. & Tremaine, S. 1987, Galactic Dynamics, Princeton: Princeton University Press Google Scholar
Binney, J., Gerhard, O.E., Stark, A.A., Bally, J., & Uchida, K. 1991, MNRAS, 252, 210 Google Scholar
Blitz, L. 1995, in Unsolved Problems of the Milky Way, Dordrecht: Kluwer, in pressGoogle Scholar
Blitz, L. & Spergel, D.N. 1991a, ApJ, 370, 205 CrossRefGoogle Scholar
Blitz, L. & Spergel, D.N. 1991b, ApJ, 379, 631 Google Scholar
Blitz, L., Binney, J., Lo, K.Y., Bally, J., & Ho, P.T.P. 1993, Nature, 361, 417 Google Scholar
Colin, J. & Athanassoula, E. 1989, A&A, 214, 99 Google Scholar
Combes, F. 1993, in The Nuclei of Normal Galaxies: Lessons from the Galactic Center, Genzel, R. & Harris, A.I., Dordrecht: Kluwer, 65 Google Scholar
Contopoulos, G. & Papayannopoulos, T. 1980, A&A, 92, 33 Google Scholar
Dejonghe, H. 1989, ApJ, 343, 113 CrossRefGoogle Scholar
de Vaucouleurs, G. & Pence, W.D. 1978, AJ, 83, 1163 CrossRefGoogle Scholar
Dwek, E., Arendt, R.G., Hauser, M.G., Kelsall, T., Lisse, C., Moseley, S.H., Silverberg, R.F. et al. 1995, ApJ, 445, 716 Google Scholar
Friedli, D. & Martinet, L. 1993, A&A, 277, 27 Google Scholar
Hernquist, L. & Weinberg, M.D. 1992, ApJ, 400, 80 CrossRefGoogle Scholar
Holmberg, E. 1969, Ark. Astron., 5, 305 Google Scholar
Jones, B.F., Klemola, A.R., & Lin, D.N.C. 1994, AJ, 107, 1333 Google Scholar
Kuijken, K. 1992, PASP, 104, 809 Google Scholar
Kuijken, K. & Tremaine, S. 1994, ApJ, 421, 178 Google Scholar
Lin, D.N.C., Jones, B.F., & Klemola, A.R. 1995, ApJ, 439, 652 Google Scholar
Little, B. & Tremarne, S. 1987, ApJ, 320, 493 CrossRefGoogle Scholar
Little, B. & Carlberg, R.G. 1991, MNRAS, 251, 227 Google Scholar
Meatheringham, S.J., Dopita, M.A., Ford, H.C. & Webster, B.L. 1988, ApJ, 327, 651 Google Scholar
Mulder, W.A. & Liem, B.T. 1986, A&A, 157, 148 Google Scholar
Nikolaev, S. & Weinberg, M.D. 1995, in preparationGoogle Scholar
Norris, J.E. & Hawkins, M.R.S. 1991, MNRAS, 380, 104 Google Scholar
Schommer, R.A., Suntzeff, N.B., Olszewski, E.W., & Harris, H.C. 1991, AJ, 103, 447 Google Scholar
Teuben, P.J., Sanders, R.H., Atherton, P.D., & Albada, G.D.V. 1986, MNRAS, 221, 1 Google Scholar
Weiland, J.L., Arendt, R.G., Berriman, G.B., Dwek, E., Freudenreich, H.T., Hauser, M.G., Kelsall, T. et al. 1994, ApJ, 425, L81 Google Scholar
Weinberg, M.D. 1985, MNRAS, 213, 451 Google Scholar
Weinberg, M.D. 1989, MNRAS, 239, 549 Google Scholar
Weinberg, M.D. 1992, ApJ, 384, 81 Google Scholar
Weinberg, M.D. 1994a, ApJ, 420, 597 Google Scholar
Weinberg, M.D. 1994b, ApJ, 421, 481 Google Scholar
Yuan, C. 1993, PASP, 105, 657 Google Scholar
Zaritsky, D., Olszewski, E.W., Schommer, R.A., Peterson, R., & Aaronson, M. 1989, ApJ, 345, 759 Google Scholar
Zaritsky, D., Smith, R., Frenk, C., & White, S.D.M. 1993, ApJ, 405, 464 Google Scholar