Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Kalin V. Staykov"'
Autor:
Kalin V. Staykov, Radostina Z. Zheleva
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 2, Pp 1-7 (2022)
Abstract In the present paper we construct novel non-topological, spontaneously scalarized neutron stars in multi-scalar Gauss–Bonnet gravity with maximally symmetric target space, and nontrivial map $$\varphi :spacetime \rightarrow target\ space$$
Externí odkaz:
https://doaj.org/article/6b9dd716b4a64310a06d01968705c761
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 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:
Kalin V. Staykov, Jose Luis Blázquez-Salcedo, Daniela D. Doneva, Jutta Kunz, Petya Nedkova, Stoytcho S. Yazadjiev
Publikováno v:
Physical Review D. 105
We study the axial quasinormal modes of hairy black holes in Gauss-Bonnet gravity with massive self-interacting scalar field. Two coupling functions of the scalar field to the Gauss-Bonnet invariant are adopted with one of them leading to black hole
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eef26df8b93d1fbbc5dd92a89f3423b6
https://doi.org/10.1103/physrevd.105.044040
https://doi.org/10.1103/physrevd.105.044040
Autor:
Kalin V. Staykov, Daniela D. Doneva
Recently, a new nonlinear mechanism for black hole scalarization, different from the standard spontaneous scalarization, was demonstrated to exist for scalar Gauss-Bonnet theories in which no tachyonic instabilities can occur. Thus Schwarzschild blac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f8fd158f6ebac7eb4b05b7ab767e321
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 12, Pp 1-13 (2019)
European Physical Journal
European Physical Journal
In this paper we investigate the thermodynamic properties of the stationary Lifshitz black hole solution of New Massive Gravity. We study the thermodynamic stability from local and global point of view. We also consider the space of equilibrium state
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::231c37c42cd61ac79372b8f8d31b495d
https://doaj.org/article/5d9e111094744edeb7896405be869a33
https://doaj.org/article/5d9e111094744edeb7896405be869a33
In the present paper, we consider the multiscalar extension of Einstein-Gauss-Bonnet gravity. We focus on multiscalar Einstein-Gauss-Bonnet models whose target space is a three-dimensional maximally symmetric space, namely, either ${\mathbb{S}}^{3}$,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08baee73b0cfbf02e2aa8f0af2541f3d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 7, Pp 1-8 (2018)
The European Physical Journal. C, Particles and Fields
European Physical Journal
The European Physical Journal. C, Particles and Fields
European Physical Journal
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, though, si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e317d6ee4fc26c5dd897cbcf1623de09
http://link.springer.com/article/10.1140/epjc/s10052-018-6064-x
http://link.springer.com/article/10.1140/epjc/s10052-018-6064-x
Publikováno v:
Physical Review D. 99
In the present paper we consider the extended scalar-tensor-Gauss-Bonnet gravity with a massive scalar field. We prove numerically the existence of Gauss-Bonnet black holes for three different forms of the coupling function including the case of spon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3b47d36b9104ec7f0541fde31d037bd
https://doi.org/10.1103/physrevd.99.104045
https://doi.org/10.1103/physrevd.99.104045
Publikováno v:
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-11 (2019)
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-11 (2019)
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 theories with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::234763550fe9352176b5efcfde32141a
http://repo.scoap3.org/api
http://repo.scoap3.org/api