Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Emel Altas"'
Autor:
Emel Altas, Bayram Tekin
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 5, Pp 1-7 (2023)
Abstract We provide two novel ways to compute the surface gravity ( $$\kappa $$ κ ) and the Hawking temperature $$(T_{H})$$ ( T H ) of a stationary black hole: in the first method $$T_{H}$$ T H is given as the three-volume integral of the Gauss–Bo
Externí odkaz:
https://doaj.org/article/83a33975a32445f29ff3d48ec877a066
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 7, Pp 1-9 (2021)
Abstract We construct the gauge-invariant electric and magnetic charges in Yang–Mills theory coupled to cosmological general relativity (or any other geometric gravity), extending the flat spacetime construction of Abbott and Deser (Phys Lett B 116
Externí odkaz:
https://doaj.org/article/dc4153bdc9454eeca929aaedbc82e6c9
Autor:
Emel Altas, Bayram Tekin
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 4, Pp 1-6 (2021)
Abstract Initial value problem in general relativity is often solved numerically; with only a few exceptions one of which is the “model” solution of Bowen and York where an analytical form of the solution is available. The solution describes a dy
Externí odkaz:
https://doaj.org/article/1e3351d36e4d45438d0739dd3b9227e3
Publikováno v:
Physical Review D. 105
A wave pulse (be it a gravitational wave or a light wave) undergoes anomalous dispersion in a vacuum in flat spacetimes with an even number of spatial dimensions even if all the frequencies move at the same speed. Such an anomalous dispersion does no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b9e2eaeb4061adc39159e640c24cb32
https://doi.org/10.1103/physrevd.105.064027
https://doi.org/10.1103/physrevd.105.064027
Autor:
Emel Altas
Publikováno v:
International Journal of Geometric Methods in Modern Physics. 18
Recently, it was shown that the conserved charges of asymptotically anti-de Sitter spacetimes can be written in an explicitly gauge-invariant way in terms of the linearized Riemann tensor and the Killing vectors. Here, we employ this construction to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::baeeba1df8a8fc7fe29e122e6ff3cd31
https://doi.org/10.1142/s0219887821502017
https://doi.org/10.1142/s0219887821502017
Autor:
Bayram Tekin, Emel Altas
We construct analytical initial data for a slowly moving and rotating black hole for generic orientations of the linear momentum and the spin. We solve the Hamiltonian constraint approximately and work out the properties of the apparent horizon and s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45d5fbde757251cc8fc43cf34e4ce4a7
http://arxiv.org/abs/2012.04450
http://arxiv.org/abs/2012.04450
Autor:
Emel Altas, Bayram Tekin
Using the time evolution equations of (cosmological) General Relativity in the first order Fischer-Marsden form, we construct an integral that measures the amount of non-stationary energy on a given spacelike hypersurface in $D$ dimensions. The integ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e67313946af2d0054d8d15dd3b385a86
Autor:
Emel Altas, Bayram Tekin
Publikováno v:
Physical Review
In a nonlinear theory, such as General Relativity, linearized field equations around an exact solution are necessary but not sufficient conditions for linearized solutions. Therefore, the linearized field equations can have some solutions which do no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::278c1d2571d9c2206a50c19c73310570
Autor:
Bayram Tekin, Emel Altas
Publikováno v:
Physical Review
WOS:000458375300008 Starting from a divergence-free rank-4 tensor of which the trace is the cosmological Einstein tensor, we give a construction of conserved charges in Einstein's gravity and its higher derivative extensions for asymptotically anti-d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::414008c524551b45821d3d7d36dfa438
https://aperta.ulakbim.gov.tr/record/106143
https://aperta.ulakbim.gov.tr/record/106143
Autor:
Bayram Tekin, Emel Altas
Publikováno v:
Physical Review
We give a new construction of conserved charges in asymptotically anti-de Sitter spacetimes in Einstein's gravity. The new formula is explicitly gauge-invariant and makes direct use of the linearized curvature tensor instead of the metric perturbatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec0b4d27f8f76dbcf71bf72888064867
https://aperta.ulakbim.gov.tr/record/106131
https://aperta.ulakbim.gov.tr/record/106131