Evolution of Primordial Black Hole Mass Spectrum in Brans–dicke Theory

Dwivedee, D.; Nayak, B.; Singh, L. P.

doi:10.1142/s0218271813500223

Cited by 6 publications

(4 citation statements)

References 57 publications

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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

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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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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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“…where t 1 is the time of matter-radiation equality and t 2 is the time after which vacuum energy dominates. We use the solutions of G(t) and a(t) for radiation, matter and vacuum dominated eras obtained by Barrow and Carr [56] and by us [57] as…”

Section: Primordial Black Holes and Brans-dicke Theorymentioning

confidence: 99%

“…From our previous paper [49], we have obtained the time dependent gravitational constant for vacuum dominated era by matching the time dimension of each term of Friedmann equation (1) as…”

Section: Introductionmentioning

confidence: 99%

Vacuum Energy and Primordial Black Holes in Brans-Dicke Theory

2015

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In our work, we study the evolution of primordial black holes within the context of Brans-Dicke theory by assuming present universe as vacuum dominated. We also consider the accretion of radiation, matter and vacuum energy only during respective dominant periods. From our study, we found that the accretion rate is slower in both radiation and vacuum energy dominated eras in Brans-Dicke theory in comparision with General Theory of Relativity [1]. Thus the PBHs evaporate at a faster rate in Brans-Dicke theory than Standard Cosmology [1], if we consider the presence of vacuum energy in both cases. We also find that vacuum energy accretion efficiency should be less than 0.61.

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“…Cosmological consequences of evaporation of PBHs in different eras have been studied quite well [13,14] (see [15] for new cosmological constraints on PBHs). It has been realized during last couple of years that the effect of accretion in the radiation dominated era can result in longlived PBHs in braneworld scenario [16], in Brans-Dicke theory [17,18,19] as well as in standard cosmology [20]. The impact of accretion of phantom energy and vacuum energy on the evolution of PBH has also been discussed in refs [21,22].…”

Section: Introductionmentioning

confidence: 99%

Accretion of radiation and rotating primordial black holes

Mahapatra

Nayak

2016

J. Exp. Theor. Phys.

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We consider rotating Primordial black holes (PBHs) and study the effect of accretion of radiation in the radiation dominated era. The central part of our analysis deals with the role of the angular momentum parameter on the evolution of PBHs. We find that both the accretion rate and evaporation rate decrease with increase in angular momentum parameter, but the rate of evaporation decreases more rapidly than the rate of accretion. This shows that the evaporation time of PBHs get prolonged with increase in angular momentum parameter. We also note that the lifetime of rotating PBHs increase with increase in accretion efficiency of the radiation as in the case of nonrotating PBHs.

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Evolution of Primordial Black Hole Mass Spectrum in Brans–dicke Theory

Cited by 6 publications

References 57 publications

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

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

Vacuum Energy and Primordial Black Holes in Brans-Dicke Theory

Accretion of radiation and rotating primordial black holes

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