Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History

We make a detailed study of boson star configurations in Jordan--Brans--Dicke theory, studying both equilibrium properties and stability, and considering boson stars existing at different cosmic epochs. We show that boson stars can be stable at any time of cosmic history and that equilibrium stars a...

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Detalles Bibliográficos
Autores principales: Torres, Diego F., Schunck, Franz E., Liddle, Andrew R.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 1998
Materias:
Física
Scalar field
Physics
Gravitation
Extreme value theory
Stars
Coupling constant
Theoretical physics
COSMIC cancer database
Boson
Radius
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/122634
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-122634
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Scalar field
Physics
Gravitation
Extreme value theory
Stars
Coupling constant
Theoretical physics
COSMIC cancer database
Boson
Radius
spellingShingle Física
Scalar field
Physics
Gravitation
Extreme value theory
Stars
Coupling constant
Theoretical physics
COSMIC cancer database
Boson
Radius
Torres, Diego F.
Schunck, Franz E.
Liddle, Andrew R.
Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
topic_facet Física
Scalar field
Physics
Gravitation
Extreme value theory
Stars
Coupling constant
Theoretical physics
COSMIC cancer database
Boson
Radius
description We make a detailed study of boson star configurations in Jordan--Brans--Dicke theory, studying both equilibrium properties and stability, and considering boson stars existing at different cosmic epochs. We show that boson stars can be stable at any time of cosmic history and that equilibrium stars are denser in the past. We analyze three different proposed mass functions for boson star systems, and obtain results independently of the definition adopted. We study how the configurations depend on the value of the Jordan--Brans--Dicke coupling constant, and the properties of the stars under extreme values of the gravitational asymptotic constant. This last point allows us to extract conclusions about the stability behaviour concerning the scalar field. Finally, other dynamical variables of interest, like the radius, are also calculated. In this regard, it is shown that the radius corresponding to the maximal boson star mass remains roughly the same during cosmological evolution.
format Articulo
Preprint
author Torres, Diego F.
Schunck, Franz E.
Liddle, Andrew R.
author_facet Torres, Diego F.
Schunck, Franz E.
Liddle, Andrew R.
author_sort Torres, Diego F.
title Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
title_short Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
title_full Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
title_fullStr Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
title_full_unstemmed Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
title_sort brans-dicke boson stars: configurations and stability through cosmic history
publishDate 1998
url http://sedici.unlp.edu.ar/handle/10915/122634
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AT schunckfranze bransdickebosonstarsconfigurationsandstabilitythroughcosmichistory
AT liddleandrewr bransdickebosonstarsconfigurationsandstabilitythroughcosmichistory
bdutipo_str Repositorios
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