Noncommutative Black Holes from Gravitationally Collapsing Shells
نویسندگان
چکیده
We study the formation of the (noncommutative) Schwarzschild black hole from collapsing polytropic and Chaplygin gas shells. We show that the collapsing shell forms either a black hole or a naked singular shell with the help of the pressure. A slight modification of collapsing shell that consists of the smeared gravitational sources can form a noncommutative Schwarzschild black hole while this noncommutative correction of matters cannot ultimately resolve the naked singularity, which might suggest that we need the full modification of shell collapse formalism from the theory beyond Einstein’s gravity. PACS numbers: 04.20.-q, 04.20.Dw, 04.50.Kd
منابع مشابه
Gravitationally Collapsing Shells in (2+1) Dimensions
We study gravitationally collapsing models of pressureless dust, fluids with pressure, and the generalized Chaplygin gas (GCG) shell in (2+1)-dimensional spacetimes. Various collapse scenarios are investigated under a variety of the background configurations such as anti-de Sitter(AdS) black hole, de Sitter (dS) space, flat and AdS space with a conical deficit. As with the case of a disk of dus...
متن کاملBlack Holes, Wormholes, and Gravitational Collapse
We study a possibility of the dynamical formation of traversable wormholes from gravitationally collapsing exotic matter clouds. For generic metric ansatz of exterior spacetimes, a crucial constraint that black holes and wormholes should satisfy is obtained through the junction conditions on the edge. As a result, it is shown that the wormhole geometry cannot be formed by following the usual Op...
متن کاملModel of ejection of matter from nonstationary dense stellar clusters and chaotic motion of gravitating shells
It is shown that during the motion of two initially gravitationally bound spherical shells, consisting of point particles moving along ballistic trajectories, one of the shell may be expelled to infinity at subrelativistic speed v exp ≤ 0.25c. The problem is solved in Newtonian gravity. Motion of two intersecting shells in the case when they do not runaway shows a chaotic behaviour. We hope tha...
متن کاملGravitationally collapsing dust in 2+1 dimensions.
We investigate the circumstances under which gravitationally collapsing dust can form a black hole in three-dimensional spacetime.
متن کاملThe exact dynamical solution for two dust shells collapsing towards a black hole
The gravitational collapse of a star is an important issue both for general relativity and astrophysics, which is related to the well known “frozen star" paradox. Following the seminal work of Oppenheimer and Schneider (1939), we present the exact solution for two dust shells collapsing towards a pre-existing black hole. We find that the inner region of the shell is influenced by the property o...
متن کامل