Pressureless disk cannot be the source for the Kerr metric

Abramowicz, Marek A.; Arkuszewski, W.; Muchotrzeb, B.

doi:10.1007/bf02725151

Cited by 4 publications

(2 citation statements)

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“…An analogous approach was used by other authors in a different context of exact solutions; see e.g. Abramowicz et al [1], Turakulov [347], and Pichon and Lynden-Bell [275], or a particularly lucid paper by Bičák et al [37]. These works may appear rather academic for people who are interested mainly in astrophysical applications of gravitating discs.…”

Section: Sourcesmentioning

confidence: 95%

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Gravitating discs around black holes

Karas

Huré

Semerák

2004

Class. Quantum Grav.

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Abstract. Fluid discs and tori around black holes are discussed within different approaches and with the emphasis on the role of disc gravity. First reviewed are the prospects of investigating the gravitational field of a black hole-disc system by analytical solutions of stationary, axially symmetric Einstein's equations. Then, more detailed considerations are focused to middle and outer parts of extended disc-like configurations where relativistic effects are small and the Newtonian description is adequate.Within general relativity, only a static case has been analysed in detail. Results are often very inspiring, however, simplifying assumptions must be imposed: ad hoc profiles of the disc density are commonly assumed and the effects of frame-dragging and completely lacking. Astrophysical discs (e.g. accretion discs in active galactic nuclei) typically extend far beyond the relativistic domain and are fairly diluted. However, self-gravity is still essential for their structure and evolution, as well as for their radiation emission and the impact on the environment around. For example, a nuclear star cluster in a galactic centre may bear various imprints of mutual star-disc interactions, which can be recognised in observational properties, such as the relation between the central mass and stellar velocity dispersion.

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Section: Sourcesmentioning

confidence: 95%

“…The central mass, M • , can be considered as one of the model parameters and varied by many orders. 1 Its value provides primary classification of cosmic objects. Physical characteristics of accretion discs scale roughly with M • .…”

Section: Introductionmentioning

confidence: 99%