Solar mass black holes from neutron stars and bosonic dark matter

Black holes with masses approximate to 1 M circle dot cannot be produced via stellar evolution. A popular scenario of their formation involves transmutation of neutron stars-by accumulation of dark matter triggering gravitational collapse in the star centers. We show that this scenario can be realized in the models of bosonic dark matter despite the apparently contradicting requirements on the interactions of dark matter particles: on the one hand, they should couple to neutrons strongly enough to be captured inside the neutron stars, and on the other, their loop-induced self-interactions impede collapse. Observing that these conflicting conditions are imposed at different scales, we demonstrate that models with efficient accumulation of dark matter can be deformed at large fields to make unavoidable its subsequent collapse into a black hole. Workable examples include weakly coupled models with bent infinite valleys.

Automated summary

Black holes with masses approximate to 1 M circle dot cannot be formed through stellar evolution, but gravitational collapse of neutron stars triggered by the accumulation of dark matter can realize this scenario. Our study demonstrates that despite the conflicting requirements on the interactions of dark matter particles, the transmutation process can be achieved in bosonic dark matter models. We show that deformations at large fields can lead to the unavoidable collapse of dark matter into a black hole in models with efficient dark matter accumulation.