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.
Similar content being viewed by others
References
Issa, I. A.: 1990,Astrophys. Space Sci. 176, 123 (Paper I).
Issa, I. A.: 1991,Astrophys. Space Sci. 184, 227 (Paper III).
Issa, I. A. and Allam, S. S.: 1991,Astrophys. Space Sci. 176, 275 (Paper II).
Author information
Authors and Affiliations
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.).
Rights and permissions
About this article
Cite this article
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
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00642958