Munoz-Tunon, C.; Prieto, M.; Beckman, J.; Cepa, J.
Bibliographical reference
(Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Phenomena in Galaxies, Puerto de la Cruz, Spain, July 4-15, 1988) Astrophysics and Space Science (ISSN 0004-640X), vol. 156, no. 1-2, June 1989, p. 301-313.
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6
1989
Citations
8
Refereed citations
8
Description
Photometric results for the galaxy NGC 4736 are presented, including IR
and visible profiles. After correction for the extinction within the
galaxy based on measured neutral gas surface densities, the profiles in
the individual bands and in color indices are interpreted in terms of
the radial distribution of stellar populations. The behavior of the two
rings, an inner ring some 40-50 arc sec from the nucleus, and an outer
ring some 300 arc sec away, are examined. The results suggest that the
inner ring is connected with an outflow of gas observed via its H II
regions, and is probably the result of an axisymmetric starburst, while
the outer ring is a site of star formation which appears to be further
from the center than the typical resonant structures associated with a
density wave.