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Observational Foundations of Inhomogeneous Universe

Published online by Cambridge University Press:  07 February 2017

P. Flin ,
J. Machalski ,
J. Maslowski ,
M. Urbanik ,
A. Zieba  and
S. Zieba
P. Flin
Affiliation:
Astronomical Observatory of the Jagiellonian University, Cracow, Poland
J. Machalski
Affiliation:
Astronomical Observatory of the Jagiellonian University, Cracow, Poland
J. Maslowski
Affiliation:
Astronomical Observatory of the Jagiellonian University, Cracow, Poland
M. Urbanik
Affiliation:
Astronomical Observatory of the Jagiellonian University, Cracow, Poland
A. Zieba
Affiliation:
Astronomical Observatory of the Jagiellonian University, Cracow, Poland
S. Zieba
Affiliation:
Astronomical Observatory of the Jagiellonian University, Cracow, Poland

Abstract

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Using new observational data at optical (Jagiellonian Field) and radio (GB region) frequencies, the distributions of galaxies and radio sources are analysed.

The results of the analysis show that there is a significant non-random surface distribution of galaxies irrespective of the scale of the field investigated. The observed clumpiness does not allow us to introduce discrete hierarchical structures. The distribution of galaxies shows rather a continuous hierarchical structure and for the description of the distribution of galaxies, some density indices should be used instead of imprecisely defined clusters of galaxies.

In the radio domain, the distribution of radio sources in the GB region and the number-flux density relations which come from the different sub-regions are investigated. The results of our investigation show that the surface density of radio sources at several flux density levels and the number-flux density relations vary from place to place in the GB region and the significance level of the observed variations is at least 1%.

The most important conclusion which can be drawn from the GB data is that results obtained from the observations of a single selected region of the sky cannot be generalized to obtain information about the whole population of radio sources in a given flux density range, and in addition the region itself – even chosen at random – ought not to be considered as a typical one.

Type
Part II: The Structure of the Universe
Information
Symposium - International Astronomical Union , Volume 63: Confrontation of Cosmological Theories , 1974 , pp. 121 - 128
Copyright
Copyright © Reidel 1974 

References

Bailey, J. A. and Pooley, G. G.: 1968, Monthly Notices Roy. Astron. Soc. 138, 51.CrossRefGoogle Scholar
Davis, M. M.: 1971, Astron. J. 76, 980.CrossRefGoogle Scholar
Davis, M. M.: 1974, in press.Google Scholar
Hinder, R. A. and Branson, N. J. B. A.: 1969, Observatory 89, 178.Google Scholar
Holden, D. J.: 1966, Monthly Notices Roy. Astron. Soc. 133, 225.Google Scholar
Hughes, R. G. and Longair, M. S.: 1967, Monthly Notices Roy. Astron. Soc. 135, 131.Google Scholar
Kellermann, K. I.: 1972, Astron. J. 77, 531.Google Scholar
Kenderdine, S., Ryle, M., and Pooley, G. G.: 1966, Monthly Notices Roy. Astron. Soc. 134, 189.Google Scholar
Kiang, D.: 1967, Monthly Notices Roy. Astron. Soc. 135, 1.Google Scholar
Machalski, J., Zieba, S., and Maslowski, J.: 1974, Astron. Astrophys., in press.Google Scholar
Maslowski, J.: 1971, Astron. Astrophys. 14, 215.Google Scholar
Maslowski, J.: 1972a, Astron. Astrophys. 16, 227.Google Scholar
Maslowski, J.: 1972b, Acta Astron. 22, 197.Google Scholar
Maslowski, J.: 1973, Astron. Astrophys. 26, 343.Google Scholar
Maslowski, J., Machalski, J., and Zieba, S.: 1973, Astron. Astrophys. 28, 289.Google Scholar
Pauliny-Toth, I. I. K. and Kellermann, K. I.: 1972, Astron. J. 77, 797.CrossRefGoogle Scholar
Pauliny-Toth, I. I. K., Kellermann, K. I., Davis, M. M., Fomalont, E. B., and Schafer, D. B.: 1972, Astron. J. 77, 265.Google Scholar
Pooley, G. G. and Kenderdine, S.: 1968, Monthly Notices Roy. Astron. Soc. 139, 529.Google Scholar
Rudnicki, K., Dworak, T. Z., and Flin, P.: 1972, Acta Cosmologica 1, 7.Google Scholar
Yahil, A.: 1972, Astrophys. J. 178, 45.Google Scholar
Zwicky, F., Herzog, E., and Wild, P.: 1961–68, Catalogue of Galaxies and Cluster of Galaxies, Vol. 1–6, California Institute of Technology, Pasadena, California.Google Scholar