Skip to Content.
Sympa Menu

fizinfo - [Fizinfo] MTA Wigner FK RMI Elméleti Osztály Szemináriuma

fizinfo AT


List archive

[Fizinfo] MTA Wigner FK RMI Elméleti Osztály Szemináriuma

Chronological Thread 
  • From: Balog Janos <balog.janos AT>
  • To: fizinfo AT, rmkiusers AT
  • Subject: [Fizinfo] MTA Wigner FK RMI Elméleti Osztály Szemináriuma
  • Date: Tue, 03 Oct 2017 09:29:37 +0200
  • Authentication-results: (amavisd-new); dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"

MTA Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk

Haryanto Siahaan
(Wigner RMI)

"Some Aspects of Magnetized Black Holes"

címmel tartandó szemináriumára.


In the last couple of years, there has been a growing interest in the studies of black holes interacting with external magnetic fields. One of the reasons is that astronomers found some evidence of strong magnetic fields in the centers of galaxies, where normally supermassive black holes sit. When the external magnetic field cannot be treated as some perturbations, the exact solutions by Ernst in Einstein-Maxwell theory can be employed to model a magnetized black hole. The solution is obtained by applying a Harrison-like transformation to a known unmagnetized one, which is also in the Einstein-Maxwell theory. However, the resulting magnetized spacetime has no asymptotic flatness anymore.

Nevertheless, some interesting questions can still be addressed to the magnetized black holes in Einstein-Maxwell theory, which will be discussed in this talk. One of the questions is whether the conjectured Kerr/CFT correspondence still holds in the case of rotating black holes immersed in a strong magnetic field. The Kerr/CFT correspondence states that the physics of four dimensional rotating black holes is dual to a two dimensional conformal field theory (2d CFT). Some evidences in supporting this conjecture are the ability of entropy and scattering formulas in 2d CFT to recover the Bekenstein-Hawking entropy and scattering process calculation in the black hole background. Another question is about the possibility of destroying a magnetized black hole by using a test particle. It can be shown that a near extremal black hole can be turned into a naked singularity if the black hole captures a classical test particle released from far away. One may wonder how the presence of external magnetic field may contribute to the possibility of destroying a black hole immersed in this field.

Helye: MTA Wigner FK RMI III.ép. Tanácsterem
Ideje: 2017 október 6 péntek du. 14:00 óra

Szívesen látunk minden érdeklődőt.

Balog János

Archive powered by MHonArc 2.6.19+.

Top of Page