Accretion of radiation and rotating primordial black holes

Mahapatra, S.; Nayak, B.

doi:10.1134/s1063776116020096

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…The value of f acc depends upon complex physical processes such as the mean free paths of the particles comprising the radiation surrounding the PBHs. Any peculiar velocity of the PBH with respect to the cosmic frame could increase the value of f acc [26][27][28][29][30]. Since the precise value of f acc is unknown, it is customary to take…”

Section: Accretionmentioning

confidence: 99%

Dark matter and dark radiation from evaporating primordial black holes

2020

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The mechanism of the generation of dark matter and dark radiation from the evaporation of primordial black holes is very interesting. We consider the case of Kerr black holes to generalize previous results obtained in the Schwarzschild case. For dark matter, the results do not change dramatically and the bounds on warm dark matter apply similarly: in particular, the Kerr case cannot save the scenario of black hole domination for light dark matter. For dark radiation, the expectations for ∆N ef f do not change significantly with respect to the Schwarzschild case, but for an enhancement in the case of spin 2 particles: in the massless case, however, the projected experimental sensitivity would be reached only for extremal black holes.

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Section: Accretionmentioning

confidence: 99%

Dark matter and dark radiation from evaporating primordial black holes

2020

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“…In literature so many works [74][75][76][77][78][79][80] are found, involving absorption of radiation, matter and dark energy. We, here, discuss accretion of energy-matter from the surroundings, when the gravity is modified due to metric formalism.…”

Section: Evolution Of Black Holesmentioning

confidence: 99%

Black Hole Dynamics in Power-law based Metric $f(R)$ Gravity

Pati,

Nayak,

Singh

2020

Preprint

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In this work, we use power-law cosmology to investigate the evolution of black holes within the context of metric f (R) gravity satisfying the conditions provided by Starobinsky model. In our study, it is observed that presently accelerated expansion of the universe can be suitably explained by this integrated model without the need for dark energy. We also found that mass of a black hole decreases by absorbing surroundings energy-matter due to modification of gravity and more the accretion rate more is mass loss. Particularly the black holes, whose formation mass is nearly 10 20 gm and above are evaporated at a particular time irrespective of their formation mass. Again our analysis reveals that the maximum mass of a black hole supported by metric f (R) gravity is 10 12 M⊙, where M⊙ represents the solar mass.

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