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The Schwarzschild radii of primordial black holes (PBHs) in the mass range of 6x10^{14}g to 4x10^{19}g match the sizes of nuclei to atoms. I discuss the resulting quantum-mechanical suppression in the accretion of matter by PBHs in dense…

High Energy Astrophysical Phenomena · Physics 2024-10-30 Abraham Loeb

According to Babichev et al., the accretion of a phantom test fluid onto a Schwarzschild black hole will induce the mass of the black hole to decrease, however the backreaction was ignored in their calculation. Using new exact solutions…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Changjun Gao , Xuelei Chen , Valerio Faraoni , You-Gen Shen

In the classical relativistic regime, the accretion of phantom-like dark energy onto a stationary black hole reduces the mass of black hole. Here we have investigated the accretion of phantom energy onto a stationary charged black hole and…

Astrophysics · Physics 2008-12-18 Mubasher Jamil , Muneer Ahmad Rashid , Asghar Qadir

The stationary, spherically symmetric accretion of dark energy onto a Schwarzschild black hole is considered in terms of relativistic hydrodynamics. The approximation of an ideal fluid is used to model the dark energy. General expressions…

Astrophysics · Physics 2014-10-13 E. Babichev , V. Dokuchaev , Yu. Eroshenko

We consider the effect of accretion of radiation in the early universe on primordial black holes in Brans-Dicke theory. The rate of growth of a primordial black hole due to accretion of radiation in Brans-Dicke theory is considerably…

Cosmology and Nongalactic Astrophysics · Physics 2009-09-03 B. Nayak , A. S. Majumdar , L. P. Singh

We investigate the dynamical behavior of phantom energy near stringy magnetically charged black hole. For this purpose, we derive equations of motion for steady-state spherically symmetric flow of phantom energy onto the stringy…

General Physics · Physics 2015-06-04 M. Sharif , G. Abbas

We deal with phantom energy accretion onto the Schwarzschild de-Sitter black hole. The energy flux conservation, relativistic Bernoulli equation and mass flux conservation equation are formulated to discuss the phantom accretion. We discuss…

General Relativity and Quantum Cosmology · Physics 2017-08-23 M. Sharif , G. Abbas

We study the evolution of primordail black holes by considering present universe is no more matter dominated rather vacuum energy dominated. We also consider the accretion of radiation, matter and vacuum energy during respective dominance…

General Relativity and Quantum Cosmology · Physics 2012-03-05 Bibekananda Nayak , Mubasher Jamil

We consider the constraints on the fraction of dark matter in the universe in the form of primordial black holes taking into account the crucial role of accretion which may change both their mass and mass function. We show that accretion…

Cosmology and Nongalactic Astrophysics · Physics 2020-08-19 V. De Luca , G. Franciolini , P. Pani , A. Riotto

Solution for a stationary spherically symmetric accretion of the relativistic perfect fluid with an equation of state p(rho) onto the Schwarzschild black hole is presented. This solution is a generalization of Michel solution and applicable…

General Relativity and Quantum Cosmology · Physics 2007-05-23 E. Babichev , V. Dokuchaev , Y. Eroshenko

In this paper we investigate a steady accretion within the Einstein-Straus vacuole, in the presence of the cosmological constant. The dark energy damps the mass accretion rate and --- above certain limit --- completely stops the steady…

General Relativity and Quantum Cosmology · Physics 2015-06-12 Janusz Karkowski , Edward Malec

In this paper we study the accretion of dark energy onto a black hole in the cases that dark energy is equipped with a positive cosmological constant and when the space-time is described by a Schwarzschild-de Sitter metric. It is shown…

General Relativity and Quantum Cosmology · Physics 2009-12-04 Prado Martín-Moruno , Az-Eddine L. Marrakchi , Salvador Robles-Pérez , Pedro F. González-Díaz

We investigate the effects of accretion of phantom energy onto primordial black holes. Since Hawking radiation and phantom energy accretion contribute to a {\it decrease} of the mass of the black hole, the primordial black hole that would…

General Relativity and Quantum Cosmology · Physics 2011-03-28 Mubasher Jamil , Asghar Qadir

In this Letter, we examine the phantom energy accretion onto a Kehagias-Sfetsos black hole in Ho$\check{r}$ava Lifshitz gravity. To discuss the accretion process onto the black hole, the equations of phantom flow near the black hole have…

General Relativity and Quantum Cosmology · Physics 2014-03-11 G. Abbas

Solution for a stationary spherically symmetric accretion of the relativistic perfect fluid with an equation of state $p(\rho)$ onto the Schwarzschild black hole is presented. This solution is a generalization of Michel solution and…

General Relativity and Quantum Cosmology · Physics 2009-11-10 E. Babichev , V. Dokuchaev , Yu. Eroshenko

In this paper we deal with accretion of dark energy in the holographic dark energy model for a general non-rotating static spherically symmetric black hole. The mass of the black hole increases or decreases depending on the nature of the…

General Relativity and Quantum Cosmology · Physics 2011-09-12 Ritabrata Biswas , Nairwita Mazumder , Subenoy Chakraborty

The new, rapidly developing field of theoretical research --- studies of dark energy interacting with black holes (and, in particular, accreting onto black holes) --- is reviewed. The term `dark energy' is meant to cover a wide range of…

General Relativity and Quantum Cosmology · Physics 2014-06-11 E. O. Babichev , V. I. Dokuchaev , Yu. N. Eroshenko

Based on the numerical solution of the time-dependent relativistic Euler equations onto a fixed Schwarzschild background space-time, we estimate the accretion rate of radial flow toward the horizon of a test perfect fluid obeying an ideal…

Astrophysics of Galaxies · Physics 2011-09-27 F. S. Guzman , F. D. Lora-Clavijo

The origin of the supermassive black holes that power the most distant quasars observed is largely unknown. One hypothesis is that they grew rapidly from intermediate-mass seeds (~100 M_sun) left by the first stars. However, some previous…

Cosmology and Nongalactic Astrophysics · Physics 2011-09-16 Yuexing Li

This paper deals with the steady-state polytropic fluid accretion onto a higher-dimensional Reissner-Nordstr$\ddot{o}$m black hole. We formulate the generalized mass flux conservation equation, energy flux conservation and relativistic…

General Relativity and Quantum Cosmology · Physics 2016-05-11 M. Sharif , Sehrish Iftikhar
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