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- W3100899004 abstract "Lopsidedness is a common feature in galaxies, both in the distribution of light and in the kinematics. We investigate the kinematics of a model for lopsided galaxies that consists of a disc lying off-centre in a dark halo, and circling around the halo centre. We search for families of stable, closed, non-crossing orbits, and assume that gas in our galaxies moves on these orbits. Several of our models show strong lopsided gas kinematics, especially the ones in which the disc spins around its axis in a retrograde sense compared to its motion around the halo centre. We are able to reproduce the HI velocity map of the kinematically lopsided galaxy NGC 4395. The lopsidedness in our models is most pronounced in the models where the halo provides a relatively large fraction of the total mass at small radii. This may explain why the gas shows lopsidedness more frequently in late-type galaxies, which are dominated by dark matter. Surfaces of section show large regions of irregular orbits in the models where the halo density is low. This may indicate that these models are unstable." @default.
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- W3100899004 date "2001-12-01" @default.
- W3100899004 modified "2023-10-16" @default.
- W3100899004 title "The kinematics of lopsided galaxies" @default.
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- W3100899004 doi "https://doi.org/10.1046/j.1365-8711.2001.04924.x" @default.
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