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Title:
Warped dust lanes in elliptical galaxies - Transient or stationary phenomena?
Authors:
Bertola, F.; Galletta, G.; Zeilinger, W. W.
Affiliation:
AA(Padova, Università, Padua, Italy), AB(Osservatorio Astronomico, Padua, Italy), AC(Wien, Universität, Vienna, Austria)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 292, May 15, 1985, p. L51-L55. (ApJL Homepage)
Publication Date:
05/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Elliptical Galaxies, Galactic Structure, Interstellar Matter, Stellar Motions, Cosmic Dust
DOI:
10.1086/184471
Bibliographic Code:
1985ApJ...292L..51B

Abstract

Spectroscopic observations of NGC 5128 show that the stellar component possesses a velocity gradient along its major axis with a total velocity difference of 160 km/s. This velocity, together with a velocity dispersion of 140 km/s, places NGC 5128 among the fast rotating elliptical galaxies. It is found that the motion of the warped dust lane with respect to that of the stars is direct. Prograde motions are also found in the warp of the E4 Anon 0151-498, while observations of a warped dust lane with retrograde motion in the E3.5 NGC 5363 are reported. The conditions under which the warped configurations in these galaxies are transient or stationary are analyzed. The intrinsic shape of these systems is also discussed.

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