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- W1574143960 abstract "The rotation curves of 20 spiral galaxies are examined in the light of a toy model (Soares 1992) which has as the main feature the assignment of a high M/L ratio (=30; Ho=50 km/s/Mpc) to the visible matter. The observed rotation of all galaxies can be accommodated without the assumption of a dark halo. Moreover, the suggestion is made that the fact that almost all available rotational velocity measurements are derived from emission lines emitted by galaxian gas (either neutral or ionized) makes them inappropriate as tracers of the galaxy gravitational potential. To account for that, the model introduces an effective potential meant to describe the hydrodynamics inside a gaseous disk. The general morphology of the curves (i.e., the presence of a plateau in V(r) X r) is interpreted in this framework as a consequence of the hydrodynamical characteristics of galaxian disks. The Tully-Fisher relation is expressed in terms of model parameters and used as an additional constraint in the process of fitting the model to the observed rotation of the galaxies." @default.
- W1574143960 created "2016-06-24" @default.
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- W1574143960 date "1994-02-09" @default.
- W1574143960 modified "2023-09-27" @default.
- W1574143960 title "An Alternative View of Flat Rotation Curves. II. The Observations" @default.
- W1574143960 hasPublicationYear "1994" @default.
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