Phantom accretion by black holes and the generalized second law of thermodynamics

Lima, J. A. S.; Pereira, S. H.; Horvath, J. E.; Guariento, Daniel C.

doi:10.1016/j.astropartphys.2010.02.008

Cited by 12 publications

(14 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In some cases, a first integral of the latter can be obtained, eliminating the dependence with the radial coordinate [11]. In the particular case of the Schwarzschild metric accreting a perfect fluid, the expressions (15) and (16) have been fully worked out [10,29], and the simplicity of the Schwarzschild line element does not require the derivation described here. In fact, the prescription forṁ consisting of solving the system formed by equations (1), (15) and (16) is valid for more general non-static metrics and can be used for any situation which satisfies the above requirements.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Consistency of the mass variation formula for black holes accreting cosmological fluids

Guariento

Horvath

2011

Gen Relativ Gravit

Self Cite

View full text Add to dashboard Cite

We address the spherical accretion of generic fluids onto black holes. We show that, if the black hole metric satisfies certain conditions, in the presence of a test fluid it is possible to derive a fully relativistic prescription for the black hole mass variation. Although the resulting equation may seem obvious due to a form of it appearing as a step in the derivation of the Schwarzschild metric, this geometrical argument is necessary to fix the added degree of freedom one gets for allowing the mass to vary with time. This result has applications on cosmological accretion models and provides a derivation from first principles to serve as a basis to the accretion equations already in use in the literature.

show abstract

Section: Discussionmentioning

confidence: 99%

“…A possible missing piece for the fully relativistic description of this accretion scenario has been provided in the work by Babichev et al [11] and has since been used in the literature [12][13][14][15][16][17], through the use of a mass variation equation of the form dm dt…”

Section: Introductionmentioning

confidence: 99%

Consistency of the mass variation formula for black holes accreting cosmological fluids

Guariento

Horvath

2011

Gen Relativ Gravit

Self Cite

View full text Add to dashboard Cite

show abstract

“…Later Pacheco 85 ruled out the previous results of phantom accretion by black holes with chemical potential. [80][81][82][83][84] Below, we adapt the procedure of Ref. 79 about constraints imposed by GSL on the mass of a black hole.…”

Section: Phantom Energy Accretion By Black Hole: Gsl Constraintsmentioning

confidence: 99%

Thermodynamics of a Schwarzschild Black Hole in Phantom Cosmology With Entropy Corrections

Jamil

Momeni

Bamba

et al. 2012

Int. J. Mod. Phys. D

View full text Add to dashboard Cite

Motivated by some earlier works [G. Izquierdo and D. Pavon, Phys. Lett. B 639 (2006) 1; H. M. Sadjadi, Phys. Lett. B 645 (2007) 108.] dealing with the study of generalized second law (GSL) of thermodynamics for a system comprising of a Schwarzschild black hole accreting a test nonself-gravitating fluid namely phantom energy in FRW universe, we extend them when the entropy of horizons of black hole and the cosmological undergo quantum corrections. Two types of such corrections are relevant here including logarithmic and power-law, while both are motivated from different theoretical backgrounds. We obtain general mathematical conditions for the validity of GSL in each case. Further we find that GSL restricts the mass of black hole for accretion of phantom energy. As such we obtain upper bounds on the mass of black hole above which the black hole cannot accrete the phantom fluid, otherwise the GSL is violated.

show abstract

“…Independent motivation for the study of evolving horizons, and one not insignificant for astrophysics, comes from the renewed interest in exact models of spherical accretion by black holes, in particular the accretion of dark or phantom energy [60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78]. This issue may again be relevant for primordial black holes which need to grow fast if they are to survive until the present era.…”

Section: Introductionmentioning

confidence: 99%

Evolving Black Hole Horizons in General Relativity and Alternative Gravity

Faraoni

2013

Galaxies

View full text Add to dashboard Cite

From the microscopic point of view, realistic black holes are time-dependent and the teleological concept of the event horizon fails. At present, the apparent or trapping horizon seem to be its best replacements in various areas of black hole physics. We discuss the known phenomenology of apparent and trapping horizons for analytical solutions of General Relativity and alternative theories of gravity. These specific examples (we focus on spherically symmetric inhomogeneities in a background cosmological spacetime) are useful as toy models for research on various aspects of black hole physics

show abstract

Phantom accretion by black holes and the generalized second law of thermodynamics

Cited by 12 publications

References 68 publications

Consistency of the mass variation formula for black holes accreting cosmological fluids

Consistency of the mass variation formula for black holes accreting cosmological fluids

Thermodynamics of a Schwarzschild Black Hole in Phantom Cosmology With Entropy Corrections

Evolving Black Hole Horizons in General Relativity and Alternative Gravity

Contact Info

Product

Resources

About