Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-14T05:59:04.220Z Has data issue: false hasContentIssue false
  • English
  • Français

Dynamics of the Galactic Bulge from gas motions

Published online by Cambridge University Press:  07 August 2017

Ortwin E. Gerhard  and
James Binney
Ortwin E. Gerhard
Affiliation:
Landessternwarte, Königstuhl, D-6900 Heidelberg, Germany
James Binney
Affiliation:
Theoretical Physics, Keble Road, Oxford OX1 3NP, U.K.

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.

Observations of cold gas in the inner galactic disk show a clumpy, highly asymmetric distribution, with large non-circular velocities. Recent work has shown that the flow of gas in the inner few kpc is dominated by a rapidly rotating bar, with corotation at R ≃ 2.4 kpc and oriented at an angle of θincl = 16 ± 2° with the line-of-sight to the Galactic Center. From the kinematical model the gravitational potential in the inner Galaxy can be determined. Gas falls inwards through the bar's inner Lindblad resonance at a rate of ∼ 0.1M⊙/ yr; this suggests that in episodic star formation significant mass and angular momentum may be added to the inner bulge.

Type
Contributed Papers
Information
Symposium - International Astronomical Union , Volume 153: Galactic Bulges , 1993 , pp. 275 - 282
Copyright
Copyright © Kluwer 1993 

References

Athanassoula, E., 1992. Astr. Ap., in press.Google Scholar
Bally, J., Stark, A.A., Wilson, R.W., Henkel, C., 1988. Ap. J. 324, 223.Google Scholar
Bania, T.M., 1977. Ap. J. 216, 381.CrossRefGoogle Scholar
Binney, J.J., Gerhard, O.E., 1992. In: Proceedings of 3 rd Maryland Astrophysics Conference Back to the Galaxy, ed. Blitz, L., in press.Google Scholar
Binney, J.J., Gerhard, O.E., Stark, A.A., Bally, J., Uchida, K.I., 1991. Mon. Not. R. astr. Soc. 252, 210.CrossRefGoogle Scholar
Binney, J.J. & Tremaine, S.D., 1987. Galactic Dynamics, Princeton University Press, Princeton.Google Scholar
Blitz, L., Spergel, D.N., 1991. Ap. J. 379, 631.CrossRefGoogle Scholar
Braunsfurth, E., Rohlfs, K., 1981. Astr. Ap. Supp. 44, 437.Google Scholar
Burton, W.B., Liszt, H.S., 1978. Ap. J. 225, 815.CrossRefGoogle Scholar
Burton, W.B., Liszt, H.S., 1983. Astr. Ap. Supp. 52, 63.Google Scholar
Combes, F., Debbasch, F., Friedli, D., Pfenniger, D., 1990. Astr. Ap. 233, 82.Google Scholar
Dame, T.M., Ungerechts, H., Cohen, R.S., de Geus, E.J., Grenier, I.A., May, J., Murphy, D.C., Nyman, L.-A., and Thaddeus, P., 1987. Ap. J. 322, 706.CrossRefGoogle Scholar
Friedli, D., Benz, W, 1992. Astr. Ap., in press.Google Scholar
Gerhard, O.E., 1992. Reviews in Modern Astronomy 5, 174.Google Scholar
Gerhard, O.E., Vietri, M., 1986. Mon. Not. R. astr. Soc. 223, 377.Google Scholar
Güsten, R., 1989. In: IAU Symposium 136, The Center of the Galaxy, ed. Morris, M., (Kluwer, Dordrecht), p. 89.Google Scholar
Habe, A., Ikeuchi, S., 1985. Ap. J. 289, 540.Google Scholar
Harmon, R., Gilmore, G., 1988. Mon. Not. R. astr. Soc. 235, 1025.CrossRefGoogle Scholar
Heiligman, G.M., 1987. Ap. J. 314, 747.Google Scholar
Jenkins, A.R., 1992. , .Google Scholar
Kent, S.M., 1992. Ap. J. 387, 181.Google Scholar
Kent, S.M., Mink, D., Fazio, G., Koch, D., Melnick, G., Tardiff, A., Maxson, C., 1992. Ap. J. Supp. 78, 403.Google Scholar
Kormendy, J., 1982. Ap. J. 257, 75.CrossRefGoogle Scholar
Liszt, H.S., Burton, W.B., 1980. Ap. J. 236, 779.Google Scholar
Matsumoto, T. et al., 1982. In: The Galactic Center, AIP Conf. No. 83, eds. Riegler, G.R., Blandford, R.D. (AIP, New York) p. 48.Google Scholar
Minniti, D., White, S.D.M., Olszewski, E., Hill, J., Irwin, M., 1992. In: IAU Symposium 149, ed. Barbuy, B. (Kluwer, Dordrecht).Google Scholar
Mulder, W.A., Liem, B.T., 1986. Astr. Ap. 157, 148.Google Scholar
Nakada, Y., Deguchi, S., Hashimoto, O., Izumiura, H., Onaka, T., Sekiguchi, K., Yamamura, I., 1991. Nature 353, 140.Google Scholar
Raha, N., Sellwood, J.A., James, R.A., Kahn, F.D., 1991. Nature 352, 411.Google Scholar
Rich, R.M., 1990. Ap. J. 362, 604.Google Scholar
Sanders, D.B., Solomon, P.M., Scoville, N.Z., 1984. Ap. J. 276, 182.Google Scholar
Sanders, R.H., Huntley, J.M., 1976. Ap. J. 209, 53.Google Scholar
Schwarz, M.P., 1981. Ap. J. 247, 77.Google Scholar
Schwarz, M.P., 1984. Mon. Not. R. astr. Soc. 209, 93.Google Scholar
Sinha, R.P., 1979. Astr. Ap. Supp. 37, 403.Google Scholar
Stark, A.A., Gerhard, O.E., Binney, J.J., Bally, J., 1991. Mon. Not. R. astr. Soc. 248, 14P.Google Scholar
van Alabada, G.D., 1985. Astr. Ap. 142, 491.Google Scholar
Whitelock, P., Catchpole, R., 1992. In: Large Scale Distribution of Gas and Dust in the Galaxy, ed. Blitz, L. (Kluwer, Dordrecht).Google Scholar