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Structure and Evolution of the Milky Way Galaxy

Published online by Cambridge University Press:  12 April 2016

Gerard Gilmore  and
Rosemary F.G. Wyse
Gerard Gilmore
Affiliation:
Institute of Astronomy, Cambridge
Rosemary F.G. Wyse
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University

Abstract

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The combination of chemical abundance, kinematic, and age data for stars near the sun provides important information about the early evolution of the Galaxy. We review available data, with some new analysis, to show that the sum of all available information strongly suggests that the extreme population II subdwarf system formed during a period of rapid collapse of the proto-Galaxy. This subdwarf system now forms a flattened, pressure-supported distribution, with axial ratio ∼2:1. The thick disk formed subsequent to the subdwarf system. At least the metal-poor tail of the thick disk is comparable in age to the globular cluster system. The thick disk is probably kinematically discrete from the Galactic old disk, though the data remain inadequate for robust conclusions.

Type
2. Morphology and History of the Galaxy
Information
International Astronomical Union Colloquium , Volume 111: The Use of Pulsating Stars in Fundamental Problems of Astronomy , 1989 , pp. 83 - 102
Copyright
Copyright © Cambridge University Press 1989

References

Armandroff, T. (1989). A.J., in press.Google Scholar
Bahcall, J.N. & Soneira, R.M. (1980). Ap. J.Suppl., 44, 73.Google Scholar
Bahcall, J.N. & Soneira, R.M. (1984). Ap.J.Suppl., 55, 67.Google Scholar
Binney, J. & May, A. (1986). M.N.R.A.S., 218, 743.Google Scholar
Carney, B. & Latham, D.W. (1986). A.J., 92, 60.Google Scholar
Dejonghe, H. & de Zeeuw, P.T. (1988). Ap.J., 329, 720.Google Scholar
Feast, M. (1987). In The Galaxy, eds. Gilmore, G. & Carswell, B., p. 1. Dordrecht: Reidel.Google Scholar
Freeman, K.C. (1987). Ann. Rev. Astron. Astrophys., 25, 603.Google Scholar
Fuchs, B. & Wielen, R. (1987). In The Galaxy, eds. Gilmore, G. & Carswell, B., p. 375. Dordrecht: Reidel.Google Scholar
Gilmore, G. & Reid, I.N., (1983). M.N.R.A.S., 202, 1025.Google Scholar
Gilmore, G. & Wyse, R.F.G. (1986). A.J., 91, 855.Google Scholar
Gilmore, G. & Wyse, R.F.G. (1987). In The Galaxy, eds. Gilmore, G. & Carswell, B., p. 247. Dordrecht: Reidel.Google Scholar
Gilmore, G., Wyse, R.F.G., & Kuijken, K. (1989). Ann. Rev. Astr.Astrophys., 27, in press.Google Scholar
Hartwick, F.D.A. (1987). In The Galaxy, eds. Gilmore, G. & Carswell, B., p. 281. Dordrecht: Reidel.Google Scholar
Frenk, C.S. & White, S.D.M. (1980). M.N.R.A.S., 193, 295.Google Scholar
Iben, I. (1986). In Cosmogonical Processes, eds Arnett, W.D., Hansen, C.J., Truran &, J.W., Tsuruta, S., p. 155. Utrecht: VNU Science Press.Google Scholar
Kinman, T.D., Wirtanen, C.A. & Janes, K.A. (1966). Ap.J.Suppl., 13, 379.Google Scholar
Koo, D.C. & Kron, R.G. (1982). Astron. & Astrophys., 105, 107.Google Scholar
Koo, D.C, Kron, R.G. & Cudworth, K. (1986). P.A.S.P., 98, 285.Google Scholar
Kuijken, K. & Gilmore, G. (1989). M.N.R.A.S., in press.Google Scholar
Laird, J.B., Carney, B.W., & Latham, D.W. (1988). A.J., 95, 1843.Google Scholar
Levison, H.F. & Richstone, D.O. (1986). Ap.J., 308, 627.Google Scholar
Matteucci, F. & Greggio, L. (1986). Astron. & Astrophys., 154, 279.Google Scholar
Norris, J. (1986). Ap.J.Suppl., 61, 667.Google Scholar
Norris, J. (1987). In The Galaxy, eds. Gilmore, G. & Carswell, B., p. 297. Dordrecht: Reidel.Google Scholar
Norris, J., & Green, E.M. (1988). Preprint.Google Scholar
Oort, J.H. & Plaut, L. (1975). Astron. & Astrophys., 41, 71.Google Scholar
O’Connell, D.J.K. (1965). Stellar Populations. Amsterdam: North Holland.Google Scholar
Ratnatunga, K.U. & Freeman, K.C. (1985). Ap.J., 291, 260.Google Scholar
Ratnatunga, K.U. & Freeman, K.C. (1988). Ap.J., in press.Google Scholar
Sandage, A. (1987). In The Galaxy, eds. Gilmore, G. & Carswell, B., p. 321. Dordrecht: Reidel.Google Scholar
Sandage, A. (1989). In The Calibration of Stellar Ages, in press. Middletown, CN: Van Vleck Observatory.Google Scholar
Sneden, C., Wheeler, J.C. & Truran, J. (1989). Ann. Rev. Astr.Astrophys., 27, in press.Google Scholar
Sommer-Larsen, J. (1987). M.N.R.A.S., 227, 21P.Google Scholar
Sommer-Larsen, J. & Christensen, P.R. (1989). Preprint.Google Scholar
Thomas, P. (1988). Preprint.Google Scholar
Tinsley, B.M. (1979). Ap.J., 229, 1046.Google Scholar
Vandenbergh, D., & Bell, R.A. (1985). Ap.J.Suppl., 58, 711.Google Scholar
Wesselink, T.H., Le Poole, R.S. & Lub, J. (1987). In Stellar Evolution and Dynamics in the Outer Halo of the Galaxy, eds. Azzopardi, M. & Matteucci, F., p. 185. Garching: ESO.Google Scholar
White, S.D.M. (1985). Ap.J., 294, L99.Google Scholar
White, S.D.M. (1989). Preprint.Google Scholar
Wielen, R. (1974). In Highlights of Astronomy, Vol. 3, ed. Contopoulos, G., p 395. Dordrecht: Reidel.Google Scholar
Wyse, R.F.G. & Gilmore, G. (1988). A.J., 95, 1404.Google Scholar
Zinn, R. (1985). Ap.J., 293, 424.Google Scholar