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Rotation Curves of 38 Galaxies in Clusters from Scanning Fabry-Perot observations

Published online by Cambridge University Press:  12 April 2016

P. Amram ,
M. Marcelin ,
C. Balkowski ,
J. Boulesteix ,
E. le Coarer ,
V. Cayatte  and
W. Sullivan III
P. Amram
Affiliation:
Observatoire de Marseille, France
M. Marcelin
Affiliation:
Observatoire de Marseille, France
C. Balkowski
Affiliation:
Observatoire de Paris-Meudon, France
J. Boulesteix
Affiliation:
Observatoire de Marseille, France
E. le Coarer
Affiliation:
Observatoire de Grenoble, France
V. Cayatte
Affiliation:
Observatoire de Paris-Meudon, France
W. Sullivan III
Affiliation:
University of Washington, Seattle, USA

Abstract

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A major astrophysical problem is related to the fact that rotation curves (RCs)) of galaxies are flat. The presence of a dark halo is most often invoked to explain that. Some controversies exist concerning the existence of a dark halo for galaxies in very hostile environments like in center of clusters. Using a scanning Fabry-Perot interferometer, we have observed Hα velocity fields of a sample of 38 galaxies located in 7 different clusters of galaxies. From this sample, our conclusion is that spirals located in the central part of clusters do not have decreasing RCs within the optical radius.

Type
2. The Fabry-Perot Spectrometer and its Applications
Information
International Astronomical Union Colloquium , Volume 149: Tridimensional Optical Spectroscopic Methods in Astrophysics , 1995 , pp. 129 - 132
Copyright
Copyright © Astronomical Society of the Pacific 1995

References

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