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dc.contributor.author
Alcubierre, Miguel
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Barranco, Juan
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Bernal, Argelia
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Degollado, Juan Carlos
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Diez Tejedor, Alberto
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Jaramillo, Victor
dc.contributor.author
Megevand Politano, Miguel Federico
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Núñez, Darío
dc.contributor.author
Sarbach, Olivier
dc.date.available
2023-08-23T19:01:31Z
dc.date.issued
2022-04
dc.identifier.citation
Alcubierre, Miguel; Barranco, Juan; Bernal, Argelia; Degollado, Juan Carlos; Diez Tejedor, Alberto; et al.; Extreme ℓ-boson stars; IOP Publishing; Classical and Quantum Gravity; 39; 9; 4-2022; 1-32
dc.identifier.issn
0264-9381
dc.identifier.uri
http://hdl.handle.net/11336/209137
dc.description.abstract
A new class of complex scalar field objects, which generalize the well known boson stars, was recently found as solutions to the Einstein-Klein-Gordon system. The generalization consists in incorporating some of the effects of angular momentum, while still maintaining the spacetime's spherical symmetry. These new solutions depend on an (integer) angular parameter ℓ, and hence were named ℓ-boson stars. Like the standard ℓ = 0 boson stars these configurations admit a stable branch in the solution space; however, contrary to them they have a morphology that presents a shell-like structure with a 'hole' in the internal region. In this article we perform a thorough exploration of the parameter space, concentrating particularly on the extreme cases with large values of ℓ. We show that the shells grow in size with the angular parameter, doing so linearly for large values, with the size growing faster than the thickness. Their mass also increases with ℓ, but in such a way that their compactness, while also growing monotonically, converges to a finite value corresponding to about one half of the Buchdahl limit for stable configurations. Furthermore, we show that ℓ-boson stars can be highly anisotropic, with the radial pressure diminishing relative to the tangential pressure for large ℓ, reducing asymptotically to zero, and with the maximum density also approaching zero. We show that these properties can be understood by analyzing the asymptotic limit ℓ → ∞ of the field equations and their solutions. We also analyze the existence and characteristics of both timelike and null circular orbits, especially for very compact solutions.
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application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BOSON STARS
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COMPACT OBJECTS
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DARK MATTER
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
Extreme ℓ-boson stars
dc.type
info:eu-repo/semantics/article
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info:ar-repo/semantics/artículo
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info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-07T21:39:09Z
dc.journal.volume
39
dc.journal.number
9
dc.journal.pagination
1-32
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Alcubierre, Miguel. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; México
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Fil: Barranco, Juan. Universidad de Guanajuato; México
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Fil: Bernal, Argelia. Universidad de Guanajuato; México
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Fil: Degollado, Juan Carlos. Universidad Nacional Autónoma de México; México
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Fil: Diez Tejedor, Alberto. Universidad de Guanajuato; México
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Fil: Jaramillo, Victor. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; México
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Fil: Megevand Politano, Miguel Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
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Fil: Núñez, Darío. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; México
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Fil: Sarbach, Olivier. Universidad Michoacana de San Nicolás de Hidalgo; México
dc.journal.title
Classical and Quantum Gravity
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1361-6382/ac5fc2
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/1361-6382/ac5fc2
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