First law of black Saturn thermodynamics

2012

Gen Relativ Gravit

Self Cite

We studied the influence of dilaton field on the dynamical collapse of a charged scalar one. Different values of the initial amplitude of dilaton field as well as the altered values of the dilatonic coupling constant were considered. We described structures of spacetimes and properties of black holes emerging from the collapse of electrically charged scalar field in dilaton gravity. Moreover, we provided a meaningful comparison of the collapse in question with the one in Einstein gravity, when dilaton field is absent and its coupling with the scalar field is equal to zero. The course and results of the dynamical collapse process seem to be very sensitive to the amplitude of dilaton field and to the value of the coupling constant in the underlying theory.

mentioning

confidence: 99%

Dilatons and the dynamical collapse of charged scalar field

Nakonieczna

2012

Gen Relativ Gravit

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“…The analytical proof of the above mentioned behavior of massive scalar hair in the background of a dilaton black hole in the theory with arbitrary coupling constant between a Uð1Þ gauge field and dilaton field was given in Ref. [13].…”

Section: Introductionmentioning

confidence: 99%

Decay of Dirac massive hair in the background of a spherical black hole

Moderski

2008

Phys. Rev. D

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The intermediate and late-time behavior of massive Dirac hair in the static spherically general black hole spacetime is studied. It is revealed that the intermediate asymptotic pattern of decay of massive Dirac spinor hair is dependent on the mass of the field under consideration as well as the multiple number of the wave mode. The long-lived oscillatory tail observed at timelike infinity in the considered background decays slowly as t À5=6 .

“…The power-law tails in the evolution of a charged massless scalar field around a fixed background of dilaton black hole was studied in [11], while the case of a self-interacting scalar field was elaborated in [12]. The analytical proof of the above mentioned behaviour of massive scalar hair in the background of a dilaton black hole in the theory with arbitrary coupling constant between U (1) gauge field and dilaton field was given in [13]. It was revealed [14] that the asymptotic behaviour of massive Dirac fields in the background of Schwarzschild black hole was independent of the multipole number of the wave mode and of the mass of the Dirac field.…”

Section: Introductionmentioning

confidence: 99%

Evolution of massive scalar fields in the spacetime of a tense brane black hole

Szypłowska

2008

Gen Relativ Gravit

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In the spacetime of a d-dimensional static tense brane black hole we elaborate the mechanism by which massive scalar fields decay. The metric of a six-dimensional black hole pierced by a topological defect is especially interesting. It corresponds to a black hole residing on a tensional 3-brane embedded in a six-dimensional spacetime, and this solution has gained importance due to the planned accelerator experiments. It happened that the intermediate asymptotic behaviour of the fields in question was determined by an oscillatory inverse power-law. We confirm our investigations by numerical calculations for five-and six-dimensional cases. It turned out that the greater the brane tension is, the faster massive scalar field decay in the considered spacetimes.