Hostname: page-component-7bb8b95d7b-dtkg6 Total loading time: 0 Render date: 2024-09-07T08:15:44.734Z Has data issue: false hasContentIssue false
  • English
  • Français

6.1. Non-axisymmetric dynamics in galaxy centers

Published online by Cambridge University Press:  25 May 2016

F. Combes
F. Combes*
Affiliation:
Observatoire de Paris, DEMIRM, 61 Av. de l'Observatoire, F-75 014 Paris, France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Our Galaxy is representative of the majority of spiral galaxies, which are highly non-axisymmetric, developping bars (m = 2 perturbations), but also lopsidedness and off-centering (m = 1), and superposed higher order perturbations. Recent high-resolution N-body and gas-dynamical simulations have considerably improved our knowledge on the nature and formation of these features. Contrary to previous beliefs, they are not long-lived, but fade away and can be reformed continuously, provided enough gas is supplied to the center, to maintain gravitational instability. The dynamical mechanisms involved are reviewed and discussed, and in particular the new features brought by the dissipative gas component. The role of these axisymmetries in the galaxy evolution, mass concentration, together with nucleus fueling are described, and typical time-scales discussed in particular for confrontation to the Milky Way observations.

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 257 - 264
Copyright
Copyright © Kluwer 1998 

References

Adams, F. C., Ruden, S. P., Shu, F. H.: 1989, ApJ 347, 959.Google Scholar
Bacon, R., Emsellem, E., Monnet, G., Nieto, J-L.: 1994, A&A 281, 691.Google Scholar
Baldwin, J. E., Lynden-Bell, D., Sancisi, R.: 1980, MNRAS 193, 313.Google Scholar
Barth, A.J., Ho, L.C., Filippenko, A.V., Sargent, W.L.: 1995, AJ 110, 1009.CrossRefGoogle Scholar
Binney, J.J.: 1994, in “Nuclei of Normal Galaxies”, ed. Genzel, R. & Harris, A., p. 75.Google Scholar
Burton, W.B., Liszt, H.S.: 1978, ApJ 225, 815.Google Scholar
Buta, R., Combes, F., 1996, Fundamental of Cosmic Physics 17, 95–282.Google Scholar
Combes, F.:1988, in “Galactic and Extragalactic Star Formation” ed. Pudritz, R. & Fich, M. p. 475.Google Scholar
Combes, F.: 1994, in “Mass-transfer induced activity in galaxies”, ed. Shlosman, I., p. 170.CrossRefGoogle Scholar
Comins, N.F., Lovelace, R.V.E., Zeltwanger, T., Shorey, P.: 1997, preprint astro-ph/9705078.Google Scholar
Dame, T.M., Ungerechts, H., Cohen, R.S. et al.: 1987, ApJ 322, 706.Google Scholar
de Vaucouleurs, G.: 1974, in IAU Symp. 58 “The formation and dynamics of galaxies”, ed. Shakeshaft, J.R. (Dordrecht), p. 335.Google Scholar
Davies, C.L., Hunter, J.H.: 1997, ApJ 484, 79.CrossRefGoogle Scholar
Emsellem, E., Combes, F.: 1997, A&A 323, 674.Google Scholar
Friedli, D., Martinet, L.: 1993, A&A 277, 27.Google Scholar
Friedli, D., Wozniak, H., Rieke, M. Martinet, L., Bratschi, P.: 1996, A&AS 118, 461.Google Scholar
Heller, C.H., Shlosman, I.: 1994, ApJ 424, 84.CrossRefGoogle Scholar
Ishizuki, S., Kawabe, R., Ishiguro, M. et al.: 1990, Nature 344, 224.Google Scholar
Jarvis, B., Dubath, P., Martinet, L., Bacon, R.: 1988, A&AS 74, 513.Google Scholar
Jungwiert, B., Combes, F., Axon, D.: 1997, A&AS in press.Google Scholar
Junqueira, S., Combes, F.: 1996, A&A 312, 703.Google Scholar
Knapen, J.H., Beckman, J.E., Shlosman, I., Peletier, R.F., Heller, C.H., de Jong, R.S.: 1995, ApJ 443, 73.Google Scholar
Kormendy, J., Richstone, D.: 1995, ARAA 33, 581.CrossRefGoogle Scholar
Lacy, J.H.: 1994, in “Nuclei of Normal Galaxies”, ed. Genzel, R. & Harris, A., p. 165.Google Scholar
Lauer, T.R., Faber, S.M., Groth, E.J. et al.: 1993, AJ 106, 1436.Google Scholar
Lo, K.Y., Claussen, M.J.: 1983, Nature 306, 647.CrossRefGoogle Scholar
Makino, J.: 1997, ApJ 478, 58.CrossRefGoogle Scholar
McLeod, K.K., Rieke, G.H.: 1995, ApJ 441, 96.Google Scholar
Miller, R.H., Smith, B.F.: 1992, ApJ 393, 508.Google Scholar
Ostriker, E.C., Shu, F.H., Adams, F.C.: 1992, ApJ 399, 192.Google Scholar
Palmer, P.L., Papaloizou, J.: 1990, MNRAS 243, 263.Google Scholar
Peletier, R.F., Knapen, J.H., Shlosman, I., Nadeau, D., Doyon, R., Rodriguez, J.M., Perez, A.M.: 1997, ApJ.Google Scholar
Richter, O-G., Sancisi, R.: 1994, A&A 290, L9.Google Scholar
Rubin, V., Kenney, J., Young, J.S.: 1997, AJ 113, 1250.CrossRefGoogle Scholar
Sandage, A., Brucato, R.: 1979, AJ 84, 472.CrossRefGoogle Scholar
Sellwood, J.A., Merritt, D.: 1994, ApJ 425, 530.Google Scholar
Shaw, M.A., Combes, F., Axon, D.J, Wright, G.S.: 1993, A&A 273, 31.Google Scholar
Shaw, M.A., Axon, D.J., Probst, R., Gatley, I: 1995, MNRAS 274, 369.Google Scholar
Shlosman, I., Frank, J., Begelman, M., 1989, Nature 338, 45.CrossRefGoogle Scholar
Shu, F. H., Tremaine, S., Adams, F. C., Ruden, S. P.: 1990, ApJ 358, 495.CrossRefGoogle Scholar
Sofue, Y.: 1997, PASJ 49, 17.Google Scholar
Stark, A.A., Binney, J.J.: 1994, ApJ 426, L31.Google Scholar
Tagger, M., Sygnet, J.F., Athanassoula, E., Pellat, R., 1987, ApJ 318, L43.Google Scholar
Taniguchi, Y., Wada, K.: 1996, ApJ 469, 581.Google Scholar
Tremaine, S.: 1995, AJ 110, 628.Google Scholar
Weinberg, M.D.: 1994, ApJ 421, 481.Google Scholar
Wozniak, H., Friedli, D., Martinet, L., Martin, P., Bratschi, P.: 1995, A&AS 111, 115.Google Scholar
Zang, T.A., Hohl, F.: 1978, ApJ 226, 521.CrossRefGoogle Scholar