Zobrazeno 1 - 10
of 163
pro vyhledávání: '"Burkhard Kleihaus"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 9, Pp 1-19 (2022)
Abstract We construct wormholes in Einstein-vector–Gauss–Bonnet theory where a real massless vector field is coupled to the higher curvature Gauss–Bonnet invariant. We consider three coupling functions which depend on the square of the vector f
Externí odkaz:
https://doaj.org/article/43d2e4393217403bb0c7d495ff964467
Publikováno v:
Universe, Vol 9, Iss 4, p 156 (2023)
We considered several different classes of asymptotically flat, rotating black objects in d=5 Einstein–Gauss–Bonnet (EGB) theory. These are black holes with two equal-magnitude angular momenta, in which case extremal configurations are studied as
Externí odkaz:
https://doaj.org/article/9535c4e91dd94a63a1b3fee8acdf36d2
Publikováno v:
Physics Letters B, Vol 817, Iss , Pp 136336- (2021)
We construct spontaneously vectorized black holes where a real vector field is coupled to the Gauss-Bonnet invariant. We employ three coupling functions for the vector field, and determine the respective domains of existence of the vectorized black h
Externí odkaz:
https://doaj.org/article/2f008f688bc942bbb17eb73eda8aa1ff
Publikováno v:
Physics Letters B, Vol 804, Iss , Pp - (2020)
We present a new type of ultracompact objects, featuring lightrings and echoes in the gravitational-wave spectrum. These particle-like solutions arise in Einstein-scalar-Gauss-Bonnet theories in four spacetime dimensions, representing globally regula
Externí odkaz:
https://doaj.org/article/d04addb5ce874ab9b119f7d38099de44
Publikováno v:
Universe, Vol 8, Iss 3, p 153 (2022)
We address neutron stars and black holes in alternative gravities, after recalling their basic properties in General Relativity. Among the plethora of interesting alternative gravities we here focus on an interesting set of scalar-tensor theories. We
Externí odkaz:
https://doaj.org/article/4ad8fb0f9d814b869664c8b8b2d18b0a
Publikováno v:
Physics Letters B, Vol 778, Iss C, Pp 161-166 (2018)
We demonstrate that rotating matter sets the throat of an Ellis wormhole into rotation, allowing for wormholes which possess full reflection symmetry with respect to the two asymptotically flat spacetime regions. We analyze the properties of this new
Externí odkaz:
https://doaj.org/article/d2de147b58244a76a9d251c5bf94c705
Publikováno v:
Physics Letters B, Vol 768, Iss C, Pp 373-379 (2017)
We study the shadows of the fully non-linear, asymptotically flat Einstein–dilaton–Gauss–Bonnet (EdGB) black holes (BHs), for both static and rotating solutions. We find that, in all cases, these shadows are smaller than for comparable Kerr BHs
Externí odkaz:
https://doaj.org/article/bf793ce7b4be4af8b67370ce9922bf4f
Publikováno v:
Physics Letters B, Vol 797, Iss , Pp - (2019)
All known five dimensional, asymptotically flat, static black rings possess conical singularities. However, there is no fundamental obstruction forbidding the existence of balanced configurations, and we show that the Einstein–Klein-Gordon equation
Externí odkaz:
https://doaj.org/article/3ef1878003ad4f05bf70c02dfcb083da
Publikováno v:
Symmetry, Vol 13, Iss 1, p 89 (2021)
We construct scalarized wormholes with a NUT charge in higher curvature theories. We consider both Einstein-scalar-Gauss-Bonnet and Einstein-scalar-Chern-Simons theories, following Brihaye, Herdeiro and Radu, who recently studied spontaneously scalar
Externí odkaz:
https://doaj.org/article/b35ba802d553488f97df8f7e10ea2761
Publikováno v:
Physics Letters B, Vol 744, Iss , Pp 406-412 (2015)
In the presence of a complex scalar field scalar–tensor theory allows for scalarized rotating hairy black holes. We exhibit the domain of existence for these scalarized black holes, which is bounded by scalarized rotating boson stars and hairy blac
Externí odkaz:
https://doaj.org/article/d06d7b0691e2407982b1eadd3a580b61