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The distribution of dark nebulae in late-type spirals

Published online by Cambridge University Press:  14 August 2015

B. T. Lynds
B. T. Lynds*
Affiliation:
Steward Observatory, University of Arizona, Tucson, Ariz., U.S.A., and Institute of Theoretical Astronomy, Cambridge, England

Abstract

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Seventeen Sc- galaxies have been studied in order to determine the distribution of dark nebulae within them. Hα plates were used to compare the distribution of obscuring material with the location of H II regions, and it was found that the H II regions are always tangent to or imbedded in regions of high obscuration. Sandage's conclusions are confirmed that strong, regular dust lanes exist in the central regions of these galaxies and wind outward on the inside edge of the two prominent arms. Characteristic dimensions of the dust lanes are noted, and secondary dust characteristics are described.

Type
Part I/Spiral Structure in Galaxies
Information
Symposium - International Astronomical Union , Volume 38: The Spiral Structure of our Galaxy , 1970 , pp. 26 - 34
Copyright
Copyright © Reidel 1970 

References

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