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Scanning Fabry-Perot observations of multiple profiles of faint and extended gas in the center of elliptical galaxies

Published online by Cambridge University Press:  12 April 2016

H. Plana  and
J. Boulesteix
H. Plana
Affiliation:
Observatoire de Marseille, France
J. Boulesteix
Affiliation:
Observatoire de Marseille, France

Abstract

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Some elliptical galaxies possess an extended gaseous disk which is usually detected from Hα and [Nil] emission. 3-D ”Cigale” observations of two of these objects, NGC 1052 and NGC 404, show the evidence of peculiar dynamics a nd in one case multiple profiles of faint extended gas which are probably from different origins. In NGC 1052, the decoupled kinematics of the gas and the stellar systems favors the hypothesis of an external origin of the interstellar matter, while in NGC 404, coherence of the stars and gas axis, as well as the low gas velocity dispersion favors an inner origin of the gas from the stars themselves.

Type
2. The Fabry-Perot Spectrometer and its Applications
Information
International Astronomical Union Colloquium , Volume 149: Tridimensional Optical Spectroscopic Methods in Astrophysics , 1995 , pp. 133 - 137
Copyright
Copyright © Astronomical Society of the Pacific 1995

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