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Intergalactic Gas

Published online by Cambridge University Press:  07 February 2017

George B. Field
George B. Field*
Affiliation:
Center for Astrophysics, Harvard College Observatory Smithsonian Astrophysical Observatory, Cambridge, Mass., U.S.A.

Abstract

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Evidence that rich clusters of galaxies contain hot (T = 108 K) intracluster gas is reviewed. Such gas contributes little to Ω (0.003) but it has been argued that Ω must be less than 0.05 for true intergalactic gas, if accretion of more gas than is observed in rich clusters is to be avoided. This argument is reviewed.

If the de Vaucouleurs' groups are bound by intracluster gas, T is expected to be 105 to 107 K and the contribution to Ω is ≃ 1. Since the clumping factor C is estimated to be ≃ 7, the resulting value of Ω2C is ≃ 7. This does not violate the observed diffuse soft X-ray background intensity. Gas should be sought in such groups. Smoothly distributed gas with 107 < T < 3 × 108 K and Ω = 1 is not ruled out by direct observations.

Type
Part I: The Contemporary Structure and Dynamics of the Universe
Information
Symposium - International Astronomical Union , Volume 63: Confrontation of Cosmological Theories , 1974 , pp. 13 - 30
Copyright
Copyright © Reidel 1974 

References

Arons, J. and Wingert, D. W.: 1972, Astrophys. J. 177, 1.Google Scholar
Bohlin, R. C., Henry, R. C., and Swandic, J. R.: 1973, Astrophys. J. 182, 1.Google Scholar
Brown, R. L.: 1973, Astrophys. J. 180, L49.CrossRefGoogle Scholar
Cowsik, R. and Kobetich, E. J.: 1972, Astrophys. J. 177, 585.Google Scholar
Davidsen, A., Bowyer, C. S., and Welch, W.: 1973, Astrophys. J. 186, L119.Google Scholar
De Young, D. S.: 1972, Astrophys. J. 173, L7.Google Scholar
De Young, D. S. and Roberts, M. S.: 1974, Astrophys. J., to be published.Google Scholar
Field, G. B.: 1972, Ann. Rev. Astron. Astrophys. 10, 227.Google Scholar
Field, G. B. and Henry, R. C.: 1964, Astrophys. J. 140, 1002.Google Scholar
Goldsmith, D. and Silk, J.: 1972, Astrophys. J. 172, 563.Google Scholar
Gorenstein, P., Bjorkholm, P., Harris, B., and Harnden, F. Jr.: 1973, Astrophys. J. 183, L57.CrossRefGoogle Scholar
Gunn, J. E. and Gott, J. R.: 1972, Astrophys. J. 176, 1.Google Scholar
Gursky, H.: 1973, Publ. Astron. Soc. Pacific 85, 493.CrossRefGoogle Scholar
Gursky, H., Kellogg, E., Murray, S., Leong, C., Tananbaum, H., and Giacconi, R.: 1971, Astrophys. J. 167, L81.Google Scholar
Holberg, J., Bowyer, S., and Lampton, M.: 1973, Astrophys. J. 180, L55.CrossRefGoogle Scholar
Kellogg, E. M., Murray, S., Giacconi, R., Tananbaum, H., and Gursky, H.: 1973, Astrophys. J. 185, L13.CrossRefGoogle Scholar
King, I. R.: 1972, Astrophys. J. 174, L123.CrossRefGoogle Scholar
Lea, S. M., Silk, J., Kellogg, E., and Murray, S.: 1973, Astrophys. J. 184, L105.Google Scholar
McKee, C. F. and Petrosian, V.: 1974, Astrophys. J. 189, 17.Google Scholar
Meekins, J. F., Gilbert, F., Chubb, T. A., Friedman, H., and Henry, R. C.: 1971, Nature 231, 107.CrossRefGoogle Scholar
Miley, G. K., Perola, G. C., Van der Kruit, P. C., and Van der Laan, H.: 1972, Nature 237, 269.CrossRefGoogle Scholar
Pariiskii, Yu. N.: 1972, Astron. Zh. 49, 1322. (English translation in Soviet Astron. AJ 16, 1048.) Google Scholar
Purcell, E. M.: 1973, private communication.Google Scholar
Rood, H. J., Page, T. L., Kinter, E. C., and King, I. R.: 1972, Astrophys. J. 175, 627.Google Scholar
Schwartz, D. and Gursky, H.: 1973, Invited papers, NASA Intl. Symposium and Workshop on Gamma-Ray Astrophysics, to be published.Google Scholar
Silk, J.: 1973, Ann. Rev. Astron. Astrophys. 11, 269.Google Scholar
Silk, J. and Tarter, J.: 1973, Astrophys. J. 183, 387.Google Scholar
Smart, N.: 1973, Astron. Astrophys. 24, 171.Google Scholar
Solinger, A. B. and Tucker, W. H.: 1972, Astrophys. J. 175, L107.Google Scholar
Sunyaev, R. A. and Zel'dovich, Ya. B.: 1972, Comments Astrophys. Space Phys. 4, 173.Google Scholar
Welch, G. A. and Sastry, G. N.: 1971, Astrophys. J. 169, L3; 1972a, ibid. 171, L81; 1972b, ibid. 175, 323.Google Scholar
Wellington, K. J., Miley, G. K., and Van der Laan, H.: 1973, Nature 244, 502.Google Scholar
Willson, M. A. G.: 1970, Monthly Notices Roy. Astron. Soc. 151, 1.Google Scholar
Yahil, A. and Ostriker, J. P.: 1973, Astrophys. J. 185, 787.Google Scholar
Zel'dovich, Ya. B. and Sunyaev, R. A.: 1969, Zh. Eksp. Teor. Fiz. 56, 2078. (English translation in Soviet Phys. JETP 29, 1118 (1970).) Google Scholar