Zobrazeno 1 - 10
of 766
pro vyhledávání: '"D Pugliese"'
Autor:
D. Pugliese, Z. Stuchlík
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 10, Pp 1-25 (2024)
Abstract We consider a counter-rotating torus orbiting a central Kerr black hole (BH) with dimensionless spin a, and its accretion flow into the BH, in an agglomerate of an outer counter-rotating torus and an inner co-rotating torus. This work focus
Externí odkaz:
https://doaj.org/article/c0a799ddc40b419bb5428335457e30c2
Autor:
D. Pugliese, H. Quevedo
Publikováno v:
Nuclear Physics B, Vol 1008, Iss , Pp 116700- (2024)
Recently, new exploratory channels have opened up for the physics of highly compact objects, such as gravitational waves and black hole shadows. Moreover, more precise analysis and observations are now possible in the physics of accretion around comp
Externí odkaz:
https://doaj.org/article/fc08ac5244c74ae1b44d92e9fd9a8af7
Autor:
D. Pugliese, Z. Stuchlík
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-34 (2024)
Abstract Kiselev metric in the static and rotating form is widely used to test different aspects of the dark energy (DE) effects. We consider a DE Kiselev spacetime, predicting the reduction to the Kerr black hole (BH) solution under suitable conditi
Externí odkaz:
https://doaj.org/article/f9f5d27a08cb41429c320c2cc3662211
Autor:
D. Pugliese, Z. Stuchlík
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 2, Pp 1-18 (2024)
Abstract We study the accretion flows towards a central Kerr super-spinning attractor, discussing the formation of the flow inversion points, defined by condition $$u^{\phi }=0$$ u ϕ = 0 on the particles flow axial velocity. We locate two closed sur
Externí odkaz:
https://doaj.org/article/f617ed04b91943e8a59c75aa01ccd0aa
Autor:
D. Pugliese, Z. Stuchlík
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 3, Pp 1-32 (2023)
Abstract Our analysis focus on the dragging effects on the accretion flows and jet emission in Kerr super-spinars. These attractors are characterized by peculiar accretion structures as double tori, or special dragged tori in the ergoregion, produced
Externí odkaz:
https://doaj.org/article/3994e2ea0e944cabb23de692ced09b12
Autor:
D. Pugliese, H. Quevedo
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 12, Pp 1-33 (2022)
Abstract We study several classes of exterior and interior axially symmetric spacetimes, such as wormholes, accelerating black holes, and binary black hole systems, from the point of view of light surfaces related to the generators of Killing horizon
Externí odkaz:
https://doaj.org/article/9028084437fc4cd18c18578a127d1cdd
Autor:
D. Pugliese, Z. Stuchlík
Publikováno v:
Nuclear Physics B, Vol 992, Iss , Pp 116229- (2023)
We study accretion tori and proto-jets in the field of central Kerr super-spinning attractors, exposing distinctions between Kerr naked singularities (NSs) and black holes (BHs). We focus on the spacetime regions very close to the central singularity
Externí odkaz:
https://doaj.org/article/598ec20ded6942fa9577efb91a79afa0
Autor:
D. Pugliese, H. Quevedo
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 5, Pp 1-25 (2022)
Abstract We discuss the fundamentals of classical black hole (BH) thermodynamics in a new framework determined by light surfaces and their frequencies. This new approach allows us to study BH transitions inside the Kerr geometry. In the case of BHs,
Externí odkaz:
https://doaj.org/article/8c7463882f9c4a6f8deb760012a90b26
Autor:
D. Pugliese, H. Quevedo
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-44 (2021)
Abstract We provide a complete characterization of the metric Killing bundles (or metric bundles) of the Kerr geometry. Metric bundles can be generally defined for axially symmetric spacetimes with Killing horizons and, for the case of Kerr geometrie
Externí odkaz:
https://doaj.org/article/6dfb40f450a6460d973d1f0f762fa7d9
Autor:
D. Pugliese, Z. Stuchlík
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 4, Pp 1-1 (2023)
Externí odkaz:
https://doaj.org/article/c05c63d525ee41b299dd1c2635d73e21