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Static and slowly rotating neutron stars in scalar-tensor theory with self-interacting massive scalar field [PDF]
European Physical Journal C: Particles and Fields, 2018 Binary pulsar observations and gravitational wave detections seriously constrained scalar-tensor theories with massless scalar field allowing only small deviations from general relativity.
Doneva, Daniela D. +3 more
core +5 more sources
Direct limits for scalar field dark matter from a gravitational-wave detector [PDF]
Nature, 2021 The nature of dark matter remains unknown to date, although several candidate particles are being considered in a dynamically changing research landscape1.
S M Vermeulen, H Grote, V Raymond
exaly +3 more sources
Spin-induced scalarization of Kerr black holes with a massive scalar field [PDF]
European Physical Journal C: Particles and Fields, 2020 In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss–Bonnet gravity with a massive scalar field.
D. Doneva +3 more
semanticscholar +2 more sources
Brief Review on Scalar Field Dark Matter Models
Frontiers in Astronomy and Space Sciences, 2019 The existence of dark matter in the Universe has been solidly established in the last decades, after the arrival of accurate cosmological and astrophysical observations, and some consider it the most challenging problem in modern physics.
L Arturo Ureña-lópez
exaly +2 more sources
Exact Conformal Scalar Field Cosmologies [PDF]
, 1994 New exact solutions of Einstein's gravity coupled to a self-interacting conformal scalar field are derived in this work. Our approach extends a solution-generating technique originally introduced by Bekenstein for massless conformal scalar fields ...
Abramowitz M +21 more
core +3 more sources
Revisiting the Carrollian scalar field [PDF]
Physical Review D, 2022 We inv estigate the (conformally coupled) scalar field on a general Carrollian spacetime in arbitrary dimension. The analysis discloses electric and magnetic dynamics.
David Rivera-Betancour, Matthieu Vilatte
semanticscholar +1 more source
Analytic description of primordial black hole formation from scalar field fragmentation [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 Primordial black hole (PBH) formation is a more generic phenomenon than was once thought. The dynamics of a scalar field in inflationary universe can produce PBHs under mild assumptions regarding the scalar potential.
Eric Cotner +3 more
semanticscholar +1 more source
Nonradial normalized solutions for nonlinear scalar field equations [PDF]
Nonlinearity, 2018 We study the following nonlinear scalar field equation Here , m > 0 is a given constant and arises as a Lagrange multiplier. In a mass subcritical case but under general assumptions on the nonlinearity f , we show the existence of one nonradial ...
L. Jeanjean, Sheng-Sen Lu
semanticscholar +1 more source
Black holes and binary mergers in scalar Gauss-Bonnet gravity: Scalar field dynamics [PDF]
Physical Review D, 2018 We study the nonlinear dynamics of black holes that carry scalar hair and binaries composed of such black holes. The scalar hair is due to a linear or exponential coupling between the scalar and the Gauss--Bonnet invariant.
Helvi Witek +3 more
semanticscholar +1 more source
Gauss-Bonnet black holes with a massive scalar field [PDF]
Physical Review D, 2019 In the present paper we consider the extended scalar-tensor-Gauss-Bonnet gravity with a massive scalar field. We prove numerically the existence of Gauss-Bonnet black holes for three different forms of the coupling function including the case of ...
D. Doneva +2 more
semanticscholar +1 more source