Título:
|
Fate of scalar dark matter solitons around supermassive galactic black holes
|
Autores:
|
Brax, Philippe ;
Valageas, Patrick ;
Ruiz Cembranos, José Alberto
|
Tipo de documento:
|
texto impreso
|
Editorial:
|
Amer Physical Soc, 2020-01-24
|
Dimensiones:
|
application/pdf
|
Nota general:
|
info:eu-repo/semantics/openAccess
|
Idiomas:
|
|
Palabras clave:
|
Estado = Publicado
,
Materia = Ciencias: Física
,
Tipo = Artículo
|
Resumen:
|
In scalar-field dark matter scenarios, a scalar-field soliton could form at the center of galactic halos, around the supermassive black holes that sit at the center of galaxies. Focusing on the large scalar-mass limit, where the soliton is formed by the balance between self-gravity and a repulsive self-interaction, we study the infall of the scalar field onto the central Schwarzschild black hole. We derive the scalar-field profile, from the Schwarzschild radius to the large radii dominated by the scalar cloud. We show that the steady state solution selects the maximum allowed flux, with a critical profile that is similar to the transonic solution obtained for the hydrodynamic case. This finite flux, which scales as the inverse of the self-interaction coupling, is small enough to allow the dark matter soliton to survive for many Hubble times.
|
En línea:
|
https://eprints.ucm.es/id/eprint/59183/1/CembranosJAR76libre.pdf
|