|
| | | | |
| | | |
| Stat |
Members: 3669
Articles: 2'599'751
Articles rated: 2609
24 March 2025 |
|
| | | | |
|
Article overview
| |
|
|
Testing the weak cosmic censorship conjecture for extremal magnetized Kerr-Newman black holes | | Yunjiao Gao
; Sijie Gao
; | | Date: |
1 Aug 2022 | | Abstract: | We test the weak cosmic censorship conjecture for magnetized Kerr-Newman
spacetime via the method of injecting a test particle. Hence, we need to know
how the black hole’s parameters change when a test particle enters the horizon.
This was an unresolved issue for non-asymptotically flat spacetimes since there
are ambiguities on the energies of black holes and particles. We find a novel
approach to solve the problem. We start with the "physical process version" of
the first law, which relates the particle’s parameters with the change in the
area of the black hole. By comparing this first law with the usual first law of
black hole thermodynamics, we redefine the particle’s energy such that the
energy can match the mass parameter of the black hole. Then, we show that the
horizon of the extremal magnetized Kerr-Newman black hole could be destroyed
after a charged test particle falls in, which leads to a possible violation of
the weak cosmic censorship conjecture. We also find that the allowed parameter
range for this process is very small, which indicates that after the self-force
and radiation effects are taken into account, the weak cosmic censorship
conjecture could still be valid. In contrast to the case where the magnetic
field is absent, the particle cannot be released at infinity to destroy the
horizon. And in the case of a weak magnetic field, the releasing point becomes
closer to the horizon as the magnetic field increases. This indicates that the
magnetic field makes the violation of the cosmic censorship more difficult.
Finally, by applying our new method to Kerr-Newman-dS (AdS) black holes, which
are well-known non-asymptotically flat spacetimes, we obtain the expression of
the particle’s energy which matches the black hole’s mass parameter. | | Source: | arXiv, 2208.00703 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
REGISTER