Scalar Field Dark Matter: behavior around black holes

Details Scalar Field Dark Matter: behavior around black holes Scalar Field Dark Matter: behavior around black holes

2010-07-30

arxiv.org/abs/1008.0027v3

JCAP 06 (2011) 029

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

15 pages, 21 eps figures. Appendix added, accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2011/06/029

We present the numerical evolution of a massive test scalar fields around a Schwarzschild space-time. We proceed by using hyperboloidal slices that approach future null infinity, which is the boundary of scalar fields, and also demand the slices to penetrate the event horizon of the black hole. This approach allows the scalar field to be accreted by the black hole and to escape toward future null infinity. We track the evolution of the energy density of the scalar field, which determines the rate at which the scalar field is being diluted. We find polynomial decay of the energy density of the scalar field, and use it to estimate the rate of dilution of the field in time. Our findings imply that the energy density of the scalar field decreases even five orders of magnitude in time scales smaller than a year. This implies that if a supermassive black hole is the Schwarzschild solution, then scalar field dark matter would be diluted extremely fast

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