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Galaxy Formation and Dark Matter

Published online by Cambridge University Press:  14 August 2015

Martin Rees
Martin Rees*
Affiliation:
Institute of Astronomy, Madingley Road Cambridge, CB3 0HA

Extract

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My aim in this general talk will be to air some questions, rather than offer firm answers, because the most basic questions about galaxies are indeed still unresolved. In particular:

1. We do not know why such things as galaxies should exist at all — why these assemblages of stars and gas with fairly standardised properties are the most conspicuous large-scale features of the cosmos.

2. About 90% of the mass associated with galaxies is hidden. The luminous stars and gas contribute only about a tenth of the gravitating material inferred from dynamical arguments. What the rest consists of is still a mystery.

3. It is unclear why the nuclei of some galaxies flare up, and release the colossal amount of non-stellar radiation emitted from quasars and radio galaxies, as discussed by Maarten Schmidt in his discourse.

Type
Invited Discourses
Information
Highlights of Astronomy , Volume 8: Highlights of Astronomy. As presented at the XXth General Assembly of the IAU, 1988 , 1989 , pp. 45 - 64
Copyright
Copyright © Kluwer 1989

References

Binney, J. and Tremarne, S. Galactic Dynamics (Princeton U.P.).Google Scholar
Blumenthal, G.R., Faber, S.M., Primack, J.R. and Rees, M.J. 1984. Nature 311, 517.Google Scholar
Bond, J.R. and Szalay, A.S. 1983. Astrophys. J 274, 443.Google Scholar
Carr, B.J., Bond, J.R. and Arnett, W.D. 1984. Astrophys. J. 277, 445.Google Scholar
Cowsik, R. and McClelland, J. 1973. Astrophys. J. 180, 7.Google Scholar
Einasto, J., Kaasik, A. and Saar, E. 1974. Nature 250, 309.CrossRefGoogle Scholar
Frenk, C., Davis, M., Efstathiou, G.P. and White, S.D.M. 1985. Nature 317, 595.Google Scholar
Gott, J.R. 1981. Astrophys. J 243, 140.Google Scholar
Gott, J.R., Gunn, J.E., Schramm, D.N. and Tinsley, B.M. 1974. Astrophys. J 194, 543.Google Scholar
Lyubimov, V.A., Novikov, E.G., Nozik, V.Z., Tretyakov, E.F., and Kozek, V.S. 1980. Phys. Lett., 394, 266.Google Scholar
Marx, G. and Szalay, A.S., 1972. Proc. Neutrino 72, Technoinform, Budapest, p.191.Google Scholar
Ostriker, J.P., Pebles, P.J.E. and Yahil, A., 1974. Astrophys. J. Letters 193, L.1. Google Scholar
Peebles, P.J.E., 1982. Astrophys. J. Letters 263, L.1.Google Scholar
Press, W.H. and Gunn, J.E., 1973. Astrophys. J 185, 397.Google Scholar
Primack, J.R., Seckel, D. and Sandoulet, B., 1988. Ann. Rev. Nucl. and Particle Sci. (in press).Google Scholar
Refsdal, S., 1970. Astrophys. J 159, 357.Google Scholar
Rubin, V., 1985. Highlights of Astronomy 7, 27.Google Scholar
Zel’dovich, Y.B., 1982. Highlights of Astronomy 6, 29.Google Scholar