Results 91 to 100 of about 2,819,674 (325)
Regular Black Holes with Asymptotically Minkowski Cores [PDF]
, 2019 Standard models of "regular black holes" typically have asymptotically de Sitter regions at their cores. Herein we shall consider novel "hollow" regular black holes, those with asymptotically Minkowski cores.
Alex Simpson, M. Visser
semanticscholar +1 more source
Spontaneous Scalarization of Black Holes and Compact Stars from a Gauss-Bonnet Coupling. [PDF]
Physical Review Letters, 2017 We identify a class of scalar-tensor theories with coupling between the scalar and the Gauss-Bonnet invariant that exhibit spontaneous scalarization for both black holes and compact stars.
Hector O. Silva +4 more
semanticscholar +1 more source
Many accelerating black holes [PDF]
, 2001 We show how the Weyl formalism allows metrics to be written down which correspond to arbitrary numbers of collinear accelerating neutral black holes in 3+1 dimensions.
Bonnor W +5 more
core +2 more sources
Advanced Engineering Materials, EarlyView.High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin +4 more
wiley +1 more source
Entropy Function for Non-Extremal Black Holes in String Theory [PDF]
, 2007 We generalize the entropy function formalism to five-dimensional and four-dimensional non-extremal black holes in string theory. In the near horizon limit, these black holes have BTZ metric as part of the spacetime geometry.
A. Dabholkar +33 more
core +3 more sources
Research in Astronomy and Astrophysics, 2010 Invited contribution to Recent Advances on the Physics of Compact Objects and Grvitational Waves, 2007, Ed.
openaire +3 more sources
Advanced Engineering Materials, EarlyView.Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente +3 more
wiley +1 more source
Scalarized charged black holes in the Einstein-Maxwell-Scalar theory with two U(1) fields
Physics Letters B, 2020 We investigate scalarized charged black holes in the Einstein-Maxwell-Scalar theory with two U(1) fields inspired by the N=4 supergravity. From the onset of the spontaneous scalarization (tachyonic instability of Reissner-Nordström black hole), these ...
Yun Soo Myung, De-Cheng Zou
doaj +1 more source
The special role of toroidal black holes in holography
Nuclear Physics B, 2023 In the standard holographic “dictionary”, the deep infrared of the strongly coupled boundary field theory is studied by examining the bulk region near to the event horizon of a simple AdS-Reissner-Nordström black hole, near to extremality.
Brett McInnes
doaj +1 more source
Shadows of spherically symmetric black holes and naked singularities [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We compare shadows cast by Schwarzschild black holes with those produced by two classes of naked singularities that result from gravitational collapse of spherically symmetric matter.
R. Shaikh +3 more
semanticscholar +1 more source