Zobrazeno 1 - 10
of 308
pro vyhledávání: '"Brustein, Ram"'
The frozen star model describes a type of black hole mimicker; that is, a regular, horizonless, ultracompact object that behaves just like a Schwarzschild black hole from an external-observer's perspective. In particular, the frozen star is bald, mea
Externí odkaz:
http://arxiv.org/abs/2410.00493
We present rotating solutions of Einstein's gravity coupled to an effective Born-Infeld theory that describes the end of open-string tachyon condensation after the decay of an unstable $D$-brane or a brane-antibrane system. The geometry of these solu
Externí odkaz:
http://arxiv.org/abs/2409.06454
Autor:
Brustein, Ram, Medved, A. J. M.
The frozen star is a non-singular, ultracompact object that, to an external observer, looks exactly like a Schwarzschild black hole, but with a different interior geometry and matter composition. The frozen star needs to be sourced by an extremely an
Externí odkaz:
http://arxiv.org/abs/2404.15985
Autor:
Brustein, Ram, Medved, A. J. M.
The Kerr metric is a vacuum solution of the Einstein equations outside of a rotating black hole, but what interior matter is actually rotating and sourcing the Kerr geometry? Here, we describe a rotating exotic matter which can source the Kerr geomet
Externí odkaz:
http://arxiv.org/abs/2310.16467
The frozen star is a recent proposal for a non-singular solution of Einstein's equations that describes an ultracompact object which closely resembles a black hole from an external perspective. The frozen star is also meant to be an alternative, clas
Externí odkaz:
http://arxiv.org/abs/2310.11572
General Relativity predicts that black holes do not possess an internal structure and consequently cannot be excited. This leads to a specific prediction about the waveform of gravitational waves, which they emit during a binary black hole inspiral a
Externí odkaz:
http://arxiv.org/abs/2306.00173
The frozen star model provides a classical description of a regularized black hole and is based upon the idea that regularizing the singularity requires deviations from the Schwarzschild geometry which extend over horizon-sized scales, as well as max
Externí odkaz:
http://arxiv.org/abs/2304.04984
We have proposed a model geometry for the interior of a regular black hole mimicker, the frozen star, whose most startling feature is that each spherical shell in its interior is a surface of infinite redshift. The geometry is a solution of the Einst
Externí odkaz:
http://arxiv.org/abs/2301.09712
Autor:
Brustein, Ram, Zigdon, Yoav
Publikováno v:
Journal of High Energy Physics volume 2022, Article number: 112 (2022)
We show that the entropy of strings that wind around the Euclidean time circle is proportional to the Noether charge associated with translations along the T-dual time direction. We consider an effective target-space field theory which includes a lar
Externí odkaz:
http://arxiv.org/abs/2208.07372
We perform a Bayesian analysis for small field models of inflation, using the most recent datasets produced by Planck`18, ACTPol, and BICEP3. We employ Artificial Neural Networks (ANN) to perform analyses with model coefficients, instead of their pro
Externí odkaz:
http://arxiv.org/abs/2207.03150