Abstract
An attempt has been made to explain the microwave background within the framework of the steady state theory by invoking thermalizers in the form of long whiskers of semi-metallic grains such as natural graphite. An ad hoc but general method has been sought for the description of a cosmic thermal system in terms of absorption coefficients of such grains in the proper Rayleigh limit. We have found that typically natural graphite grains, having axial ratios of the order of 104 to 105 and a temperature about 4 K, have a broad absorption peak only at decimetre wavelengths and thus cannot adequately thermalize the background. It is also shown that the effects of such an absorbing medium on such radio astronomical tests as the number count test or the angular size test can be very severe, especially in Friedmann cosmologies. These effects are marginal in the steady state theory. The desirable physico-optical properties of such semi-metallic thermalizers have also been investigated.
Similar content being viewed by others
References
Baldwin, J. A.: 1977,Monthly Notices Roy. Astron. Soc. 178, L67.
Barlow, M. J.: 1978,Monthly Notices Roy. Astron. Soc. 183, 417.
Burbidge, E. M., Smith, H. E., Weymann, R. J. and Williams, R. E.: 1977,Astrophys. J. 218, 1.
Carter, D. L. and Bate, R. T.: 1971,The Physics of Semimetals and Narrow Gap Semiconductors, Pergamon Press, p. 181, 174.
Chitre, S. M. and Narlikar, J. V.: 1976,Astrophys. Space Sci. 44, 101.
Conklin, E. K. and Bracewell, R. N.: 1967,Phys. Rev. Lett. 18, 614.
Davidson, K.: 1977,Astrophys. J. 218, 20.
Gilra, D. P.: 1972, in A. D. Code (ed.),Scientific Results of OAO-2, N.A.S.A., p. 295.
Hoyle, F., Wickramasinghe, N. C. and Reddish, V. C.: 1968,Nature 218, 1124.
Jones, R. C.: 1945,Phys. Rev. 68, 93.
Kapahi, V. K.: 1975,Monthly Notices Roy. Astron. Soc. 172, 513.
Mason, B. and Berry, L.: 1968,Elements of Mineralogy, Freeman & Co., p. 221.
Mathis, J. S., Rumpl, W. and Nordsieck, K. H.: 1977,Astrophys. J. 217, 425.
McKee, C. F. and Petrosian, V.: 1974,Astrophys. J. 189, 21.
McVittie, G. C.: 1965,General Relativity and Cosmology, Chapman & Hall Ltd.
Narlikar, J. V. and Wickramasinghe, N. C.: 1968,Nature 217, 1235.
Narlikar, J. V., Edmunds, M. G. and Wickramasinghe, N. C.: 1975,Proc. Far Infrared Conference, Royal Astron. Soc., Windsor, England.
Nickerson, B. G. and Partridge, R. B.: 1971,Astrophys. J. 169, 203.
Philipp, H. R.: 1977,Phys. Rev. B 16, 2898.
Primak, W. and Fuchs, L. H.: 1954,Phys. Rev. 95, 22.
Smoot, G. F., Gorenstein, M. V. and Muller, R. A.: 1977,Phys. Rev. Letters 39, 898.
Soule, D. E.: 1958a,Phys. Rev. 112, 698.
Soule, D. E.: 1958b,Phys. Rev. 112, 708.
Spain, I. L.: 1971,The Physics of Semimetals and Narrow Gap Semiconductors, Pergamon Press, p. 177, 186.
Subrahmanya, C. R.: 1977, Ph.D. Thesis, University of Bombay, India.
Swarup, G.: 1975,Monthly Notices Roy. Astron. Soc. 172, 501.
van de Hulst, H. C.: 1957,Light Scattering by Small Particles, John Wiley & Sons Inc., New York.
von Hoerner, S.: 1973,Astrophys. J. 186, 741.
Wardle, J. F. and Miley, G. K.: 1974,Astron. Astrophys. 30, 305.
Weinberg, S.: 1972,Gravitation and Cosmology, John Wiley & Sons Inc., New York.
Wickramasinghe, N. C.: 1973,Light Scattering Functions for Small Particles, Adam Hilger, London.
Wickramasinghe, N. C., Edmunds, M. G., Chitre, S. M., Narlikar, J. V. and Ramadurai, S.: 1975,Astrophys. Space Sci. 35, L9.
Wu, Chi-chao: 1977,Astrophys. J. 217, L117.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rana, N.C. Absorption effects of intergalactic natural graphite whiskers on observations at microwave and radio frequencies. Astrophys Space Sci 66, 173–190 (1979). https://doi.org/10.1007/BF00648369
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00648369