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Star formation and stellar populations in ring galaxies

Published online by Cambridge University Press:  07 August 2017

A. P. Marston ,
P. N. Appleton ,
M. Lysaght  and
C. Struck-Marcell
A. P. Marston
Affiliation:
Department of Physics and Astronomy, Drake University, Des Moines, IA 50311, USA
P. N. Appleton
Affiliation:
Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
M. Lysaght
Affiliation:
Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
C. Struck-Marcell
Affiliation:
Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA

Extract

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Colliding ring galaxies provide a remarkable testbed for the study of star formation in perturbed galaxies. In the process of passing through a disk system, a small perturbing galaxy generates a density wave of stars and gas which expands into the host disk. This triggers a wave of star formation. As the star forming wave passes through the host galaxy, progressively older burst populations may be found interior to the ring. As part of a multiwavelength study of ring galaxies, we have performed optical and infrared imaging using the Kitt Peak 2.1m telescope. These images are used to explore the relation between stellar density wave amplitude and star formation rate. Color gradients are searched for which would indicate the presence of an aging burst population interior to the ring.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 453
Copyright
Copyright © Kluwer 

References

Appleton, P. N. and Struck-Marcell, C., 1987, Ap.J. , 318, 103.Google Scholar