Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Miguel Bezares"'
We investigate neutron star solutions in scalar-tensor theories of gravity with first-order derivative self-interactions in the action and in the matter coupling. We assess the robustness of the kinetic screening mechanism present in these theories a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed68865655d82ea6cb9830dabd372603
https://hdl.handle.net/20.500.11767/131070
https://hdl.handle.net/20.500.11767/131070
Publikováno v:
Physical Review D. 106
One of the major obstacles to testing alternative theories of gravity with gravitational-wave data from merging binaries of compact objects is the formulation of their field equations, which is often mathematically ill-suited for time evolutions. A p
Publikováno v:
Physical Review D
Scalar-tensor theories with first-derivative self interactions, known as $k$-essence, may provide interesting phenomenology on cosmological scales. On smaller scales, however, initial value evolutions (which are crucial for predicting the behavior of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8eb95716f6b3cb4d135902847674145
http://hdl.handle.net/20.500.11767/127889
http://hdl.handle.net/20.500.11767/127889
Autor:
Miguel Bezares, Mateja Bošković, Steven Liebling, Carlos Palenzuela, Paolo Pani, Enrico Barausse
Publikováno v:
Physical Review D
Boson stars have attracted much attention in recent decades as simple, self-consistent models of compact objects and also as self-gravitating structures formed in some dark-matter scenarios. Direct detection of these hypothetical objects through elec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1eaea469f3373d81c4e0fa0c6cb7c12
http://hdl.handle.net/10261/295413
http://hdl.handle.net/10261/295413
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Physical Review D
instname
Physical Review D
We consider k-essence, a scalar-tensor theory with first-order derivative self-interactions that can screen local scales from scalar fifth forces, while allowing for sizeable deviations from general relativity on cosmological scales. We construct ful
Scalar-tensor theories whose phenomenology differs significantly from general relativity on large (e.g. cosmological) scales do not typically pass local experimental tests (e.g. in the solar system) unless they present a suitable "screening mechanism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bb3c23cd53fe00ecfedf59b67fb029b
Publikováno v:
Physical Review D
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Physical Review Letters
instname
Physical Review Letters
Gravitational theories differing from General Relativity may explain the accelerated expansion of the Universe without a cosmological constant. However, to pass local gravitational tests, a "screening mechanism" is needed to suppress, on small scales
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::467ba793a739a82c9d4c8f234c91d826
http://hdl.handle.net/10261/256530
http://hdl.handle.net/10261/256530
Publikováno v:
Journal of Cosmology and Astroparticle Physics
We study the vacuum Cauchy problem for K-essence, i.e. cosmologically relevant scalar-tensor theories that involve first-order derivative self-interactions, and which pass all existing gravitational wave bounds. We restrict to spherical symmetry and
Autor:
Miguel Bezares, Carles Bona
Publikováno v:
Physical Review D. 100
The Cosmological Principle is applied to a five-dimensional vacuum manifold. The general (non-trivial) solution is explicitly given. The result is a unique metric, parametrized with the sign of the space curvature ($k=0,\pm 1$) and the signature of t