scholarly journals Quasistationary solutions of scalar fields around collapsing self-interacting boson stars

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
Alejandro Escorihuela-Tomàs ◽  
Nicolas Sanchis-Gual ◽  
Juan Carlos Degollado ◽  
José A. Font
Keyword(s):  
Scalar Fields ◽  
Boson Stars ◽  
Quasistationary Solutions

Boson Stars: Gravitational Equilibria of Self-Interacting Scalar Fields

1986 ◽  
Vol 57 (20) ◽  
pp. 2485-2488 ◽  
Author(s):  
Monica Colpi ◽  
Stuart L. Shapiro ◽  
Ira Wasserman
Keyword(s):  
Scalar Fields ◽  
Boson Stars

scholarly journals Quasistationary solutions of self-gravitating scalar fields around black holes

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
Nicolas Sanchis-Gual ◽  
Juan Carlos Degollado ◽  
Pedro J. Montero ◽  
José A. Font
Keyword(s):  
Black Holes ◽  
Scalar Fields ◽  
Quasistationary Solutions

scholarly journals Boson stars in a theory of complex scalar fields coupled to the U (1) gauge field and gravity

2014 ◽  
Vol 31 (16) ◽  
pp. 167001 ◽  
Author(s):  
Sanjeev Kumar ◽  
Usha Kulshreshtha ◽  
Daya Shankar Kulshreshtha
Keyword(s):  
Gauge Field ◽  
Scalar Fields ◽  
Boson Stars ◽  
Complex Scalar

scholarly journals On a Crucial Role of Gravity in the Formation of Elementary Particles

Universe ◽  
2020 ◽  
Vol 6 (11) ◽  
pp. 193
Author(s):  
Ahmed Alharthy ◽  
Vladimir V. Kassandrov
Keyword(s):  
Elementary Particle ◽  
Energy Requirement ◽  
Numerical Procedure ◽  
Coupled System ◽  
Scalar Fields ◽  
Boson Stars ◽  
Electromagnetic Interactions ◽  
Klein Gordon ◽  
First Time

We consider the model of minimally interacting electromagnetic, gravitational and massive scalar fields free of any additional nonlinearities. In the dimensionless form, the Lagranginan contains only one parameter γ=(mG/e)2 which corresponds to the ratio of gravitational and electromagnetic interactions and, for a typical elementary particle, is about 10−40 in value. However, regular (soliton-like) solutions can exist only for γ≠0, so that gravity would be necessary to form the structure of an (extended) elementary particle. Unfortunately (in the stationary spherically symmetrical case), the numerical procedure breaks in the range γ≤0.9 so that whether the particle-like solutions actually exist in the model remains unclear. Nonetheless, for γ∼1 we obtain, making use of the minimal energy requirement, a discrete set of (horizon-free) electrically charged regular solutions of the Planck’s range mass and dimensions (“maximons”, “planckeons”, etc.). In the limit γ→∞, the model reduces to the well-known coupled system of the Einstein and Klein–Gordon equations. We obtain—to our knowledge—for the first time, the discrete spectrum of neutral soliton-like solutions (“mini-boson stars”, “soliton stars”, etc.)

scholarly journals BOSON STARS FROM A GAUGE CONDENSATE

2007 ◽  
Vol 22 (04) ◽  
pp. 273-281 ◽  
Author(s):  
VLADIMIR DZHUNUSHALIEV ◽  
KAIRAT MYRZAKULOV ◽  
RATBAY MYRZAKULOV
Keyword(s):  
Gauge Field ◽  
Scalar Fields ◽  
Finite Energy ◽  
Boson Stars

The boson star filled with two interacting scalar fields is investigated. The scalar fields can be considered as a gauge condensate formed by SU (3) gauge field quantized in a nonperturbative manner. The corresponding solution is regular everywhere, has a finite energy and can be considered as a quantum SU (3) version of the Bartnik–McKinnon particle-like solution.

scholarly journals SLOWLY ROTATING BOSON-FERMION STAR

2001 ◽  
Vol 10 (06) ◽  
pp. 881-892 ◽  
Author(s):  
CLAUDIO M. G. DE SOUSA ◽  
VANDA SILVEIRA
Keyword(s):  
Ground State ◽  
Scalar Fields ◽  
Slow Rotation ◽  
Boson Stars ◽  
Structure And Stability

Relativistic prescription is used to study the slow rotation of stars composed by self-gravitating bosons and fermions (fermions may be considered as neutrons). Previous results demand that purely boson stars are unable to display slow rotation, if one uses relativistic prescription with classical scalar fields. In contrast to this, the present work shows that a combined boson-fermion star in its ground-state can rotate. Its structure and stability are analysed under slow rotation approximations.

scholarly journals Quasistationary solutions of self-gravitating scalar fields around collapsing stars

2015 ◽  
Vol 92 (8) ◽  
Author(s):  
Nicolas Sanchis-Gual ◽  
Juan Carlos Degollado ◽  
Pedro J. Montero ◽  
José A. Font ◽  
Vassilios Mewes
Keyword(s):  
Scalar Fields ◽  
Quasistationary Solutions

scholarly journals Quasistationary solutions of scalar fields around accreting black holes

2016 ◽  
Vol 94 (4) ◽  
Author(s):  
Nicolas Sanchis-Gual ◽  
Juan Carlos Degollado ◽  
Paula Izquierdo ◽  
José A. Font ◽  
Pedro J. Montero
Keyword(s):  
Black Holes ◽  
Scalar Fields ◽  
Quasistationary Solutions

scholarly journals New AdS4 vacua in dyonic ISO(7) gauged supergravity

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Nikolay Bobev ◽  
Thomas Fischbacher ◽  
Fridrik Freyr Gautason ◽  
Krzysztof Pilch
Keyword(s):  
Scalar Fields ◽  
Global Symmetry ◽  
Supergravity Theory

Abstract We identify 219 AdS4 solutions in four-dimensional dyonically gauged ISO(7) $$ \mathcal{N} $$ N = 8 supergravity and present some of their properties. One of the new solutions preserves $$ \mathcal{N} $$ N = 1 supersymmetry and provides a rare explicit example of an AdS4 vacuum dual to a 3d SCFT with no continuous global symmetry. There are also two new non-supersymmetric solutions for which all 70 scalar fields in the supergravity theory have masses above the BF bound. All of these AdS4 solutions can be uplifted to massive type IIA supergravity. Motivated by this we present the low lying operator spectra of the dual 3d CFTs for all known supersymmetric AdS4 solutions in the theory and organize them into superconformal multiplets.

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