Scalar field haloes as gravitational lenses
arXiv:astro-ph/0603309 · doi:10.1111/j.1365-2966.2006.10330.x
Abstract
A non-topological soliton model with a repulsive scalar self-interaction of the Emden type provides a constant density core,similarly as the empirical Burkert profile of dark matter haloes. As a further test, we derive the gravitational lens properties of our model, in particular, the demarcation curves between `weak' and `strong' lensing. Accordingly, strong lensing with typically three images is almost three times more probable for our solitonic model than for the Burkert fit. Moreover, some prospective consequences of a possible flattening of dark matter haloes are indicated.
arXiv comment8 pages, 4 figures, accepted by Mon. Not. R. Astron. Soc
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