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1.1. The Galactic bulge

Published online by Cambridge University Press:  25 May 2016

R. Michael Rich
R. Michael Rich*
Affiliation:
Department of Astronomy, Columbia University, New York, NY 10027, USA

Abstract

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I review current work on the Galactic bulge, with emphasis on issues that may connect to the environment of the Galactic Center. There is growing evidence that the field population of the bulge at RGC > 500pc is as old as the metal rich Galactic center globular clusters, and that field and clusters have the same spatial and metallicity distribution. We suggest that by analogy, extragalactic metal rich cluster systems, which also tend to follow the spheroid light, are old. On the other hand, there has been long standing evidence for an age gradient toward the Galactic center, and recent observations confirm without doubt that there is active star formation there. If a long-lived bar has been funneling gas (and inducing star formtion) in the central 100 pc, the star formation history there will be complicated and interesting.

Type
Part I. Stellar Cluster, Star Formation
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 11 - 18
Copyright
Copyright © Kluwer 1998 

References

Armandroff, T. E. 1993 in The Globular Cluster-Galaxy Connection, ASP 48, (Smith, G. and Brodie, J., eds.) p. 48.Google Scholar
Ashman, K.A., & Zepf, S. 1992, ApJ, 384, 50.Google Scholar
Balcells, M., & Peletier, R. 1994, AJ, 107, 135.CrossRefGoogle Scholar
Barbuy, B., Bica, E., & Ortolani, 1998, A&A, in press.Google Scholar
Becklin, E.E., & Neugebauer, G. 1968, ApJ, 151, 145.Google Scholar
Binney, J., Gerhard, O., & Spergel, D.N. 1997, MNRAS, 288, 365.Google Scholar
Bissantz, Englmaier, Binney, J., & Gerhard, O. 1997, MNRAS, 289, 621.Google Scholar
Blitz, L., & Spergel, D.N. 1991, ApJ, 379, 631.CrossRefGoogle Scholar
Blum, R.D., Sellgren, K.S., & Depoy, D.L. 1996, AJ, 112, 1988.Google Scholar
Catchpole, R.M., Whitelock, P.A., & Glass, I.S. 1990, MNRAS, 247, 479.Google Scholar
Eckart, A., Genzel, R. et al. 1995, ApJ, 445, L23.Google Scholar
Figer, D.F., Mclean, I.S., & Morris, M.L. 1995, ApJ, 447, L29.CrossRefGoogle Scholar
Figer, D.F. et al. 1998, BAAS, in press.Google Scholar
Forbes, D.A., Brodie, J.P., & Grillmair, C.J. 1997, AJ, 481, 710.Google Scholar
Frogel, J.A., & Elias, J.H. 1988, ApJ, 324, 823.Google Scholar
Frogel, J.A., & Whitelock, P.A. 1998, ApJ, in press.Google Scholar
Geisler, D., Lee, M.G., & Kim, E. 1996, AJ, 111, 1529.Google Scholar
Genzel, R., Hollenbach, D., & Townes, C.H. 1994, Rep. Prog. Phys. 57, 417.Google Scholar
Giavalisco, M., Steidel, C.C., & Machetto, D.M. 1996 ApJ, 471, 164.Google Scholar
Glass, I.S., Whitelock, P.A., Catchpole, R.M., & Feast, M.W. 1995, MNRAS, 273, 383.Google Scholar
Guarnieri, M.D., Renzini, A., & Ortolani, S. 1997, ApJ, 477, L21.Google Scholar
Haller, J.W., & Rieke, M.J. 1989, in The Center of the Galaxy, ed. Morris, M. (Dordrecht:Kluwer)p.487.Google Scholar
Ibata, R.A., Wyse, R.F.G., Gilmore, G., Irwin, M.J., & Suntzeff, N.B. 1997 AJ, 113, 634.CrossRefGoogle Scholar
Izumiura, H., Deguchi, S., Hashimoto, O., Nakada, Y., Onaka, T., Ono, T., Ukita, N., & Yamamura, I. 1994, ApJ, 437, 419.Google Scholar
Izumiura, H., Deguchi, S., & Fujii, T. 1997, astro-ph/9712101.Google Scholar
Kormendy, J., & Richstone, D. 1995, ARAA, 33, 581.Google Scholar
Krabbe, A., Genzel, R., Drapatz, S., & Rotatciuc, V. 1992, A&A, 261, 535.Google Scholar
Lindqvist, M., Habing, H.J., & Winnberg, A. 1992, A&A, 263, 183.Google Scholar
McWilliam, A., & Rich, R.M. 1994, ApJS, 91, 749.CrossRefGoogle Scholar
Minniti, D. 1996, ApJ, 459, 175.Google Scholar
Morris, M., & Serabyn, G. 1996, ARAA 34, 645.Google Scholar
Ng, Y.K. 1997, A&A, 328, 211.Google Scholar
Ortolani, S., Renzini, A., Gilmozzi, R., Marconi, G., Barbuy, B., Bica, E., & Rich, R.M. 1995, Nat, 377, 701.CrossRefGoogle Scholar
Rich, R.M. 1988, AJ, 95, 828.Google Scholar
Rich, R.M. 1990, ApJ, 362, 604.Google Scholar
Rich, R.M., Terndrup, D.M., & Sadler, E.M. 1998, in preparation.Google Scholar
Rich, R.M. 1993 in The Globular Cluster-Galaxy Connection, ASP 48, (Smith, G. and Brodie, J., eds.) p. 287.Google Scholar
Rich, R.M. 1997a in J.D. 1.Google Scholar
Rich, R.M. 1997b in IAU Symp. 187.Google Scholar
Sadler, E.M., Rich, R.M., & Terndrup, D.M. 1996, 112, 171.Google Scholar
Spaenhauer, A., Jones, B.F., & Whitford, A.E. 1992, AJ, 103, 297.Google Scholar
Tyson, N.D., & Rich, R.M. 1991, ApJ, 367, 547.Google Scholar
Westerlund, B.E., Lequeux, J., Azzopardi, M., & Rebeirot, E. 1991, A&A, 24, 367.Google Scholar
Whitelock, P.A., Feast, M.W., & Catchpole, R.M. 1991, MNRAS, 248, 276.Google Scholar
Wyse, R.F.G., Gilmore, G., & Franx, M. 1997, ARAA, 35, 637.CrossRefGoogle Scholar
Zepf, S.E., Ashman, K.M., & Geisler, D. 1995, ApJ, 570.Google Scholar
Zhao, H.S. 1996, MNRAS, 283, 149.Google Scholar
Zhao, H.S., Rich, R.M., & Spergel, D.N. 1996, MNRAS, 282, 175.Google Scholar
Zhao, H.S., Spergel, D.N., & Rich, R.M. 1994, AJ, 108, 2154.Google Scholar