Computer Science
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.335..705b&link_type=abstract
Nature (ISSN 0028-0836), vol. 335, Oct. 20, 1988, p. 705, 706. FFWF-supported research.
Computer Science
23
Accretion Disks, Angular Momentum, Counter Rotation, Elliptical Galaxies, Absorption Spectra, Cosmic Dust, Emission Spectra, Spiral Galaxies
Scientific paper
Decoupling of angular momenta of gas and stars in elliptical galaxies constitutes evidence for the acquisition of external material by these galaxies later in their history. New observations on four major-axis dust-lane ellipticals Anon 1029-459, NGC3528, NGC4370, and NGC5745, are presented. In the first two of these, counterrotation of gas and stars is observed, whereas the two components are corotating in NGC4370 and NGC5745; these results are consistent with the acquisition hypothesis. The same accretion events occur also in S0 galaxies, where they give rise to polar rings or to counter- and corotating as in the equatorial plane. As dynamic decoupling in these latter galaxies appears common, it is suggested that in all S0s with extended emission lines the gas is of external origin.
Bertola Francesco
Buson Lucio Maria
Zeilinger Werner W.
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