scholarly journals Boson stars in AdS spacetime

2013 ◽  
Vol 87 (12) ◽  
Author(s):  
Alex Buchel ◽  
Steven L. Liebling ◽  
Luis Lehner
Keyword(s):  
Boson Stars ◽  
Ads Spacetime

scholarly journals Islands and stretched horizon

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Yoshinori Matsuo
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Hawking Radiation ◽  
Entanglement Entropy ◽  
Total System ◽  
Island Rule ◽  
Asymptotically Flat ◽  
Flat Spacetime ◽  
Ads Spacetime ◽  
Hole Geometry

Abstract Recently it was proposed that the entanglement entropy of the Hawking radiation contains the information of a region including the interior of the event horizon, which is called “island.” In studies of the entanglement entropy of the Hawking radiation, the total system in the black hole geometry is separated into the Hawking radiation and black hole. In this paper, we study the entanglement entropy of the black hole in the asymptotically flat Schwarzschild spacetime. Consistency with the island rule for the Hawking radiation implies that the information of the black hole is located in a different region than the island. We found an instability of the island in the calculation of the entanglement entropy of the region outside a surface near the horizon. This implies that the region contains all the information of the total system and the information of the black hole is localized on the surface. Thus the surface would be interpreted as the stretched horizon. This structure also resembles black holes in the AdS spacetime with an auxiliary flat spacetime, where the information of the black hole is localized at the interface between the AdS spacetime and the flat spacetime.

scholarly journals Dynamical formation and stability of fermion-boson stars

2020 ◽  
Vol 102 (8) ◽  
Author(s):  
Fabrizio Di Giovanni ◽  
Saeed Fakhry ◽  
Nicolas Sanchis-Gual ◽  
Juan Carlos Degollado ◽  
José A. Font
Keyword(s):  
Boson Stars

scholarly journals New solutions for rotating boson stars

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
Felix Kling ◽  
Arvind Rajaraman ◽  
Freida Liz Rivera
Keyword(s):  
Boson Stars

GR-AMRVAC code applications: accretion onto compact objects, boson stars versus black holes

2016 ◽  
Vol 33 (15) ◽  
pp. 155010 ◽  
Author(s):  
Z Meliani ◽  
P Grandclément ◽  
F Casse ◽  
F H Vincent ◽  
O Straub ◽  
...  
Keyword(s):  
Black Holes ◽  
Compact Objects ◽  
Boson Stars

Astrophysics: Big, repulsive boson stars

Nature ◽  
1986 ◽  
Vol 324 (6096) ◽  
pp. 413-413
Author(s):  
Robert Walgate
Keyword(s):  
Boson Stars

Geometry and thermodynamics of smeared Reissner–Nordström black holes in d -dimensional AdS spacetime

2017 ◽  
Vol 26 (9) ◽  
pp. 090202
Author(s):  
Bo-Bing Ye ◽  
Ju-Hua Chen ◽  
Yong-Jiu Wang
Keyword(s):  
Black Holes ◽  
Ads Spacetime

scholarly journals Spinning boson stars and hairy black holes with nonminimal coupling

2018 ◽  
Vol 27 (11) ◽  
pp. 1843009 ◽  
Author(s):  
Carlos A. R. Herdeiro ◽  
Eugen Radu
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Scalar Field ◽  
Coupling Parameter ◽  
Nonminimal Coupling ◽  
Boson Stars ◽  
Hairy Black Holes ◽  
Black Hole Solutions ◽  
Hairy Black Hole ◽  
Coupled Theory

We obtain spinning boson star solutions and hairy black holes with synchronized hair in the Einstein–Klein–Gordon model, wherein the scalar field is massive, complex and with a nonminimal coupling to the Ricci scalar. The existence of these hairy black holes in this model provides yet another manifestation of the universality of the synchronization mechanism to endow spinning black holes with hair. We study the variation of the physical properties of the boson stars and hairy black holes with the coupling parameter between the scalar field and the curvature, showing that they are, qualitatively, identical to those in the minimally coupled case. By discussing the conformal transformation to the Einstein frame, we argue that the solutions herein provide new rotating boson star and hairy black hole solutions in the minimally coupled theory, with a particular potential, and that no spherically symmetric hairy black hole solutions exist in the nonminimally coupled theory, under a condition of conformal regularity.

scholarly journals Gravitational memory of boson stars

1998 ◽  
Vol 57 (8) ◽  
pp. 4821-4825 ◽  
Author(s):  
Diego F. Torres ◽  
Andrew R. Liddle ◽  
Franz E. Schunck
Keyword(s):  
Boson Stars

CIRCULAR ORBITS AROUND SCHWARZSCHILD–AdS SPACETIME

2004 ◽  
Vol 19 (36) ◽  
pp. 2683-2695 ◽  
Author(s):  
A. M. DE M. CARVALHO ◽  
CLAUDIO FURTADO ◽  
FERNANDO MORAES
Keyword(s):  
Band Structure ◽  
Parallel Transport ◽  
Circular Orbits ◽  
Global Properties ◽  
Ads Spacetime

In this paper we discuss parallel transport of vectors and spinors around circular orbits in Schwarzschild–AdS spacetime. We study the global properties of this spacetime via loop variables or holonomy. A set of paths in this background is considered. We demonstrate that for some special radii there appears the so-called quantized band structure of holonomy invariance. This analysis is also extended to parallel transport of a spinor in this spacetime.

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