Naslov
A novel black hole mimicker: a boson star and a global monopole nonminimally coupled to gravity

Autori
Marunović, Anja ; Murković, Miljenko

Izvornik
Classical and quantum gravity (0264-9381) 31 (2014), 4; 045010-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
boson stars; global monopole; black hole mimickers

Sažetak
A field-theoretic model for a highly compact object that mimicks a black hole is found for the gravitationally interacting system of a boson star and a global monopole which are nonminimally coupled to gravity. According to the strength of the nonlinear gravitational effects and the gravitational backreaction, three distinct coupling regimes are featured: weak, mild and strong. In the strong coupling regime we show that a repulsive monopole stabilizes an attractive boson star and the resulting configuration exhibits large energy density, large (and negative) principal pressures, large compactness, large effective potential, large local forces, and yet exhibits no event horizon. As such a composite system of a boson star and a global monopole represents a convincing microscopic candidate for a black hole mimicker.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA