Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Daniele Malafarina"'
Autor:
Hrishikesh Chakrabarty, Debasish Borah, Ahmadjon Abdujabbarov, Daniele Malafarina, Bobomurat Ahmedov
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 1, Pp 1-15 (2022)
Abstract We study the effects of gravitational lensing on neutrino oscillations in the $$\gamma $$ γ -spacetime which describes a static, axially-symmetric and asymptotically flat solution of the Einstein’s field equations in vacuum. Using the qua
Externí odkaz:
https://doaj.org/article/21b4e31d2c52440697145943ca23424b
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 8, Pp 1-11 (2020)
Abstract We consider a class of space-times given by a stationary extension of the Zipoy–Voorhees metric that was found by Halilsoy. We show that the solutions do not describe rotating sources but must be interpreted, similarly to the NUT case, as
Externí odkaz:
https://doaj.org/article/0f645d3e963e4b39ba89e62d192c63fe
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 7, Pp 1-11 (2020)
Abstract The assumption of asymptotic flatness for isolated astrophysical bodies may be considered an approximation when one considers a cosmological context where a cosmological constant or vacuum energy is present. In this framework we study the mo
Externí odkaz:
https://doaj.org/article/4a7451f903fe41d2a23a61171f95e9f0
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-10 (2020)
Abstract We present a dynamical toy model for an expanding universe inside a black hole. The model is built by matching a spherically symmetric collapsing matter cloud to an expanding Friedmann–Robertson–Walker universe through a phase transition
Externí odkaz:
https://doaj.org/article/24c3162bb9e0463bb97a1ad646169f5f
Autor:
Ayan Nussupbekov, Daniele Malafarina
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 3, Pp 1-10 (2020)
Abstract We consider the effects that modifications to general relativity (GR) at high densities may have on the structure of spherical compact objects. Such effects can be modeled via semi-classical corrections that are manifest in an additional eff
Externí odkaz:
https://doaj.org/article/92b8cbfc44944fe3a44e7f3b2a2d09a4
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 7, Pp 1-9 (2017)
Abstract We study the observational properties of a class of exact solutions of Einstein’s field equations describing stationary, axially symmetric, rigidly rotating dust (i.e. non-interacting particles). We ask the question whether such solutions
Externí odkaz:
https://doaj.org/article/6480bad5d1e74a53b20fa010e65d94ba
Publikováno v:
Physics Letters B, Vol 741, Iss , Pp 82-86 (2015)
We discuss a counterintuitive phenomenon of classical general relativity, in which a significant fraction of the radiation emitted by a collapsing object and detected by a distant observer may be blueshifted rather than redshifted. The key-point is t
Externí odkaz:
https://doaj.org/article/57791ddb8f9141b589eeaa8b6f2bc5d6
Autor:
Daniele Malafarina
Publikováno v:
Universe, Vol 4, Iss 9, p 92 (2018)
Quantum resolutions of the space-time singularity at the end of gravitational collapse may provide hints towards the properties of a final theory of Quantum-Gravity. The mechanism by which the singularity is avoided and replaced by a bounce depends o
Externí odkaz:
https://doaj.org/article/b8fc64b08a814706b1e6e38397ecc6e2
Autor:
Daniele Malafarina
Publikováno v:
Universe, Vol 3, Iss 2, p 48 (2017)
In the last four decades, different programs have been carried out aiming at understanding the final fate of gravitational collapse of massive bodies once some prescriptions for the behaviour of gravity in the strong field regime are provided. The ge
Externí odkaz:
https://doaj.org/article/25778aed9f9e449f901083330782d9aa
Autor:
Song Li, Temurbek Mirzaev, Ahmadjon A. Abdujabbarov, Daniele Malafarina, Bobomurat Ahmedov, Wen-Biao Han
Publikováno v:
Physical Review D. 106
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffe4947a2e4c35def3a4d9177cad2704
https://doi.org/10.1103/physrevd.106.084041
https://doi.org/10.1103/physrevd.106.084041