The ratio of DLA absorption velocity width to host galaxy velocity dispersion decreases with impact parameter, and steep dark matter halo density profiles fit the data better than shallow ones, though no model can be excluded.
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Exploring galaxy dark matter halos across redshifts with strong quasar absorbers
The ratio of DLA absorption velocity width to host galaxy velocity dispersion decreases with impact parameter, and steep dark matter halo density profiles fit the data better than shallow ones, though no model can be excluded.