Free Motion around Black Holes with Disks or Rings: Between Integrability and Chaos-V

0511642 - ASÚ 2020 RIV US eng J - Článek v odborném periodiku
Polcar, L. - Suková, Petra - Semerák, O.
Free Motion around Black Holes with Disks or Rings: Between Integrability and Chaos-V.
Astrophysical Journal. Roč. 877, č. 1 (2019), č. článku 16. ISSN 0004-637X. E-ISSN 1538-4357
Grant CEP: GA ČR(CZ) GJ17-06962Y
Institucionální podpora: RVO:67985815
Klíčová slova: black hole physics * chaos * gravitation
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.746, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.3847/1538-4357/ab18a0

The present paper focuses on two new points. First, because the Bach-Weyl thin ring is physically quite unsatisfactory, we now repeat some of the analyses for a different, Majumdar-Papapetrou-type (extremally charged) ring around an extreme Reissner-Nordstrom black hole, and compare the results with those obtained before. We also argue that such a system is in fact more relevant astrophysically than it may seem. Second, we check numerically, for the latter system as well as for the Schwarzschild black hole encircled by the inverted Morgan-Morgan disk, how indicative the geometric (curvature) criterion is for the chaos suggested by Sota et al. We also add a review of the literature where the relevance of geometric criteria in general relativity (as well as elsewhere) has been discussed for decades.
Trvalý link: http://hdl.handle.net/11104/0301876