Abstract
The extended X-ray sources associated with the Virgo, Perseus, and Coma clusters of galaxies can best be explained as a result of the Compton scattering of relativistic electrons (generated in the radio sources which are present in each of these clusters) on the microwave background radiation. The same physical process involving microwave infrared or optical photons generated in the nuclei of active galaxies may account for the more compact X-ray sources. Thermal bremsstrahlung of hot gas in clusters of galaxies is a less likely source of X-rays.
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References
Burbidge, G. R., Ann. Rev. Astron. Astrophys., 8, 369 (1970).
Burbidge, G. R., Astrophys. J. Lett., 159, L105 (1970).
Gursky, H., Kellogg, E. M., Murray, S., Leong, C., Tananbaum, H., and Giacconi, R., Astrophys. J. Lett., 167, L81 (1971).
Willson, M. A. G., Mon. Not. Roy. Astron. Soc., 151, 1 (1970).
Burbidge, G. R., IAU Symp. 44, 492 (Reidel, Dordrecht, 1972).
Henry, R. C., Astrophys. J. Lett., 172, L97 (1972).
Friedman, H., and Byram, E. T., Astrophys. J., 147, 399 (1967).
Felten, J. E., Gould, R. J., Stein, W. A., and Woolf, N. J., Astrophys. J., 146, 955 (1966).
Meekins, J. F., Fritz, G., Chubb, T. A., Friedman, H., and Henry, R. C., Nature, 231, 107 (1971).
Gott, J. R., and Gunn, R. E., Astrophys. J. Lett., 169, L13 (1971).
Ruderman, M. A., and Spiegel, E. A., Astrophys. J., 165, 1 (1971).
Mathews, W. G., and Baker, J. C., Astrophys. J., 170, 241 (1971).
Gursky, H., Solinger, A., Kellogg, E. M., Murray, S., Tananbaum, H., Giacconi, R., and Cavaliere, A., Astrophys. J. Lett., 173, L99 (1972).
Oort, J. H., in La Structure et l'Evolution de l'Universe, 163 (Stoops, Brussels, 1958).
Burbidge, G., and Burbidge, E., Astrophys. J., 130, 629 (1959).
Chincarini, G., and Rood, H. J., Astrophys. J., 168, 321 (1971).
Oort, J. H., Astron. Astrophys., 7, 381 (1970).
Abell, G. O., Ann. Rev. Astron. Astrophys., 3, 1 (1965).
Vaucouleurs, G. de., Astrophys. J. Suppl., 6, 213 (1961).
Zwicky, F., Morphological Astronomy (Springer Verlag, 1957).
Brecher, K., and Burbidge, G. R., Astrophys. J. (in the press).
Bridle, A. H., and Feldman, P., Nature Physical Science, 235, 168 (1972).
Giacconi, R., Gursky, H., Kellogg, E., Murray, S., Schreier, E., and Tananbaum, H., Astrophys. J. (in the press).
Fomalont, E. B., and Rogstad, D. H., Astrophys. J., 146, 528 (1966).
Abell, G. O., Astrophys. J. Suppl., 25, 211 (1957).
Felten, J. E., and Morrison, P., Astrophys. J., 146, 686 (1966).
Kellogg, E., Gursky, H., Leong, E., Schreier, E., Tananbaum, H., and Giacconi, R., Astrophys. J. Lett., 165, L49 (1971).
Bolton, J. G., and Clark, B. G., Pub. Astron. Soc. Pacific, 72, 29 (1960).
Byram, E. T., Chubb, T. A., and Friedmann, H., Science, 169 366 (1970).
Bowyer, C. S., Lampton, M., Mack, J., and Mendonca, F., Astrophys. J. Lett., 161, L1 (1970).
Lamptpn, M., Margon, B., Bowyer, S., Mahoney, W., and Anderson, K., Astrophys. J. Lett., 171, L45 (1972).
Ekers, R. D., Austr. J. Phys. Astrophys. Supp. No. 6 (1968).
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BRECHER, K., BURBIDGE, G. Extragalactic X-ray Sources. Nature 237, 440–443 (1972). https://doi.org/10.1038/237440a0
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DOI: https://doi.org/10.1038/237440a0
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