Zobrazeno 1 - 10
of 155
pro vyhledávání: '"Stoytcho S. Yazadjiev"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-5 (2024)
Abstract We prove under certain weak assumptions a black hole no-hair theorem in spherically symmetric spacetimes for self-gravitating time-dependent multiple scalar fields with an arbitrary target space admitting a Killing field with a non-empty axi
Externí odkaz:
https://doaj.org/article/d6127c32b23648c39297e1d7efd5749a
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 12, Pp 1-7 (2020)
Abstract In the present paper we study the onset of the spin-induced scalarization of a Kerr black hole in scalar-Gauss–Bonnet gravity with a massive scalar field. Our approach is based on a $$(2+1)$$ ( 2 + 1 ) time evolution of the relevant linear
Externí odkaz:
https://doaj.org/article/5553406c5b7a45649593e24bdae3bbda
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 9, Pp 1-12 (2020)
Abstract In the modern era of abundant X-ray detections and the increasing momentum of gravitational waves astronomy, tests of general relativity in strong field regime become increasingly feasible and their importance for probing gravity cannot be u
Externí odkaz:
https://doaj.org/article/040d1fb7f6714c84946af9dea9d595a9
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-11 (2019)
Abstract We are investigating universal relations between different normalisations of the moment of inertia and the compactness of neutron stars in slow rotation approximation. We study the relations in particular class of massive scalar-sensor theor
Externí odkaz:
https://doaj.org/article/22459683607442b39ea380ca450c9dd6
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 10, Pp 1-9 (2018)
Abstract The recent detection of gravitational waves from a neutron star merger was a significant step towards constraining the nuclear matter equation of state by using the tidal Love numbers (TLNs) of the merging neutron stars. Measuring or constra
Externí odkaz:
https://doaj.org/article/72ce24a6ea6b459087c433cc4d9d87f5
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 7, Pp 1-8 (2018)
Abstract Binary pulsar observations and gravitational wave detections seriously constrained scalar–tensor theories with massless scalar field allowing only small deviations from general relativity. If we consider a nonzero mass of the scalar field,
Externí odkaz:
https://doaj.org/article/b9330b21577a4e8889e651bdef1af3bd
Autor:
Sebastian Bahamonde, Daniela D. Doneva, Ludovic Ducobu, Christian Pfeifer, Stoytcho S. Yazadjiev
Publikováno v:
Physical Review D. 107
In this paper, we find new scalarized black holes by coupling a scalar field with the Gauss-Bonnet invariant in Teleparallel gravity. The Teleparallel formulation of this theory uses torsion instead of curvature to describe the gravitational interact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea7d6421340d64f6d0d73a399c281ea0
https://doi.org/10.1103/physrevd.107.104013
https://doi.org/10.1103/physrevd.107.104013
Publikováno v:
Physical Review D. 106
Black holes in scalar-Gauss-Bonnet gravity are prone to scalarization, that is a spontaneous development of scalar hair for strong enough spacetime curvature while the weak field regime of the theory coincides with general relativity. Since large spa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b0650d443c8b2f049379d7bbeb04edc
https://doi.org/10.1103/physrevd.106.l061502
https://doi.org/10.1103/physrevd.106.l061502
As it became well known in the past years, Einstein-scalar-Gauss-Bonnet (EsGB) theories evade no-hair theorems and allow for scalarized compact objects including black holes (BH). The coupling function that defines the theory is the main character in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e85e23a0932960cfa622126584f1843
http://arxiv.org/abs/2208.02077
http://arxiv.org/abs/2208.02077
Publikováno v:
Physical Review D. 105
Spontaneous scalarization of black holes in scalar-Gauss-Bonnet (sGB) gravity is a very interesting phenomenon allowing black holes to circumvent the no-hair theorem and acquire scalar hair while leaving the weak field regime of the theory practicall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::925cc93390a3ec9a20051168a67233f8
https://doi.org/10.1103/physrevd.105.124005
https://doi.org/10.1103/physrevd.105.124005