Skip to main content

A METHOD TO TEST THE EXISTENCE OF REGULAR BLACK HOLES

Illustration of a black hole. Image Credit & Copyright: Alain Riazuelo


The existence of the singularity is an intrinsic problem of the General Relativity (GR).

At the fundamentally level, the resolution of the problem of the singularity lies with the expectation that under situations where quantum effects become strong, the behavior of gravity could possibly greatly deviate from that predicted by the classical theory of GR.

Regular black hole solution are proposed with the same spacetime geometry outside the horizon as the traditional black hole, but bears no singularity inside. Whether or not black hole singularities should exist, they would be covered by the black hole horizon. The black hole horizon serves as an information curtain hindering outside observers from directly observing the interior structure of the black hole, and determining that whether or not the black hole singularity does really exist.

A method is needed to check the correctness of the new constructions of regular black holes. In a recent paper (Deng & Cleaver 2016) the authors suggest to use the Hawking radiation as a possible method to probe into the structure of black holes.

Mechanism of the Hawking radiation near the event horizon.

Hawking radiation is black-body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon.

The authors study the Hawking radiation through fermion tunnelling from one type regular black hole. They assess that results contain modifications from that of the traditional black hole, which confirms the possibility of employing the Hawking radiation as a promising method to probe into the structure of black holes as far as these modifications are testable at astronomical observations.




  • Deng & Cleaver 2016 - Hawking Radiation from Regular Black Hole as a Possible Probe for Black Hole Interior Structure (arXiv)
  • Hawking radiation - (Wikipedia)
Etichette:

Comments

Post a Comment

Popular posts from this blog

A UNIVERSE WITHOUT A CENTER?

Image Credit: Eugenio Bianchi, Carlo Rovelli & Rocky Kolb. According to the standard theories of cosmology, there is no center of the universe. In a conventional explosion, material expand out from a central point and the instinct suggests that with the Big Bang happened something similar. But the Big Bang was not an explosion like that at all: it was an explosion of space, not an explosion in space . The Big Bang happened everywhere in the Universe.
Post a Comment
Read more

UNIVERSE IS FINITE OR INFINITE?

Art by Moonrunner Design   At present there is no answer to this question. However I will try to list the hypothesys currently on the table with related issues.
Post a Comment
Read more

New research looks at how ‘cosmic web’ of filaments alters star formation in galaxies

Cosmic Web. Credit: NASA Astronomer Gregory Rudnick sees the universe crisscrossed by something like an interstellar superhighway system. Filaments — the strands of aggregated matter that stretch millions of light years across the universe to connect galaxy clusters — are the freeways. “Galaxies will flow along filaments from less dense parts of the universe to more dense parts of the universe, kind of like cars flowing down a highway to the big city. In this case, they are going toward big clusters, being pulled by the gravity of those large concentrations of matter,” he said. “I’m interested in how galaxies are affected by the regions in which they live,” Rudnick said. “Filaments are the first place where galaxies come into contact with higher density regions of the universe. If a galaxy in a ‘rural’ part of the universe enters a dense part, I want to know how its properties change — for example, does it change the number of stars it forms, or does its shape get altered? Us...
Post a Comment
Read more