Scalarization of compact stars in the scalar-Gauss-Bonnet gravity
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2019)064
Abstract: Abstract We study scalarization of horizonless neutral compact reflecting stars. In our model, the scalar hair can be induced by the coupling of static scalar fields to the Gauss-Bonnet invariant. We analytically obtain lower bounds… read more here.
Keywords: scalarization compact; scalarization; compact stars; gauss bonnet ... See more keywords
Cosmological instability of scalar-Gauss-Bonnet theories exhibiting scalarization
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/06/023
Abstract: In a subclass of scalar-tensor theories, it has been shown that standard general relativity solutions of neutron stars and black holes with trivial scalar field profiles are unstable. Such an instability leads to solutions which… read more here.
Keywords: scalarization; gauss bonnet; instability; scalar gauss ... See more keywords
Spontaneous scalarization of Gauss-Bonnet black holes: Analytic treatment in the linearized regime
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.064039
Abstract: It has recently been proved that nontrivial couplings between scalar fields and the Gauss-Bonnet invariant of a curved spacetime may allow a central black hole to support spatially regular scalar hairy configurations. Interestingly, former numerical… read more here.
Keywords: scalarization; black hole; bar; bar eta ... See more keywords
Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.104013
Abstract: In this paper, we find new scalarized black holes by coupling a scalar field with the Gauss-Bonnet invariant in Teleparallel gravity. The Teleparallel formulation of this theory uses torsion instead of curvature to describe the… read more here.
Keywords: bonnet; teleparallel gravity; scalarization; gauss bonnet ... See more keywords
Spontaneous scalarization in generalized scalar-tensor theory
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.124022
Abstract: Spontaneous scalarization is a mechanism that endows relativistic stars and black holes with a nontrivial configuration only when their spacetime curvature exceeds some threshold. The standard way to trigger spontaneous scalarization is via a tachyonic… read more here.
Keywords: scalar tensor; scalarization; tensor theory; generalized scalar ... See more keywords
Dynamics of Spontaneous Black Hole Scalarization and Mergers in Einstein-Scalar-Gauss-Bonnet Gravity.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.127.101102
Abstract: We study the dynamics of black holes in scalar Einstein-Gauss-Bonnet theories that exhibit spontaneous black hole scalarization using recently introduced methods for solving the full, nonperturbative equations of motion. For one sign of the coupling… read more here.
Keywords: black holes; scalarization; black hole; gauss bonnet ... See more keywords
Critical Phenomena in Dynamical Scalarization of Charged Black Holes
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review Letters"
DOI: 10.1103/physrevlett.128.161105
Abstract: We report a new black hole (BH) scalarization mechanism and disclose novel dynamical critical phenomena in the process of the nonlinear accretion of the scalar field into BHs. The accretion process can transform a seed… read more here.
Keywords: scalarized bald; phenomena dynamical; black holes; scalarization ... See more keywords
A Combined Approach to Reducing the Pareto Set Using Linear or Multiplicative Scalarization
Sign Up to like & getrecommendations! Published in 2017 at "Scientific and Technical Information Processing"
DOI: 10.3103/s0147688217050094
Abstract: In this paper, the multicriteria choice problem, including the decision maker’s (DM) binary preference relation, is considered. Two combined two-stage approaches are proposed. According to these approaches, first, we have to reveal some information on… read more here.
Keywords: combined approach; pareto set; approach reducing; scalarization ... See more keywords