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Absorption gradient in some galaxies, IV

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Abstract

The internal absorption and the absorption gradient along the major and minor axes are studied, following the approach outlined already in Papers I, II, and III. The sample consists of five spirals and one irregular. The surface distribution of dark clouds in these galaxies continues to assume periodicity as found in M31.

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References

  • Issa, I. A.: 1990,Astrophys. Space Sci. 176, 123 (Paper I).

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  • Issa, I. A.: 1991,Astrophys. Space Sci. 184, 227 (Paper III).

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  • Issa, I. A. and Allam, S. S.: 1991,Astrophys. Space Sci. 176, 275 (Paper II).

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Authors and Affiliations

  1. National Research Institute of Astronomy and Geophysics, Cairo, Egypt

    I. A. Issa & S. S. Allam

  2. Fac. Science, Astronomical Department, Cairo University, Cairo, Egypt

    M. A. Al Shalapy

Authors
  1. I. A. Issa
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  2. S. S. Allam
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  3. M. A. Al Shalapy
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Additional information

Those results and the following ones constitute part of an M.Sc. Thesis, submitted to Cairo University by the junior author (S.S.A.).

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Issa, I.A., Allam, S.S. & Shalapy, M.A.A. Absorption gradient in some galaxies, IV. Astrophys Space Sci 189, 123–133 (1992). https://doi.org/10.1007/BF00642958

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  • DOI: https://doi.org/10.1007/BF00642958

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