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Paper: The Tully-Fisher Zero Point Problem
Volume: 396, Formation and Evolution of Galaxy Disks
Page: 467
Authors: Dutton, A.A.; van den Bosch, F.C.; Courteau, S.
Abstract: A long standing problem for hierarchical disk galaxy formation models has been the simultaneous matching of the zero point of the Tully-Fisher relation and the galaxy luminosity function. We illustrate this problem for a typical disk galaxy and discuss three solutions: low stellar mass-to-light ratios, low initial dark halo concentrations, and no halo contraction. We speculate that halo contraction may be reversed through a combination of mass ejection through feedback and angular momentum exchange brought about by dynamical friction between baryons and dark matter during the disk formation process.
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