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PRIMORDIAL BLACK HOLES IN AN ACCELERATING UNIVERSE
, 2002
"... General expressions are given for the generation of Primordial Black Holes (PBH) in a universe with a presently accelerated expansion due to a(n effective) cosmological constant. We give expressions both for a powerlaw scalefree primordial spectrum and for spectra which are not of that type. Special ..."
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General expressions are given for the generation of Primordial Black Holes (PBH) in a universe with a presently accelerated expansion due to a(n effective) cosmological constant. We give expressions both for a powerlaw scalefree primordial spectrum and for spectra which are not of that type
Primordial Black Holes With Gravitational Memory
, 1998
"... We have studied the evolution of primordial black holes (PBHs) in a universe with variable gravitational constant and bulk viscosity. We found that the gravitational constant attained its peak value at the time t ∼ 10 −23 sec but its value at Planck’s time is equal to the present value. A proton for ..."
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We have studied the evolution of primordial black holes (PBHs) in a universe with variable gravitational constant and bulk viscosity. We found that the gravitational constant attained its peak value at the time t ∼ 10 −23 sec but its value at Planck’s time is equal to the present value. A proton
Primordial Black Hole Formation in Supergravity
, 1998
"... We study a double inflation model (a preinflation + a new inflation) in supergravity and discuss formation of primordial black holes which may be identified with massive compact halo objects (MACHOs) observed in the halo of our galaxy. The preinflation drives an inflaton for the new inflation clos ..."
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We study a double inflation model (a preinflation + a new inflation) in supergravity and discuss formation of primordial black holes which may be identified with massive compact halo objects (MACHOs) observed in the halo of our galaxy. The preinflation drives an inflaton for the new inflation
Primordial Black Holes With Variable Gravity
, 1999
"... We have studied the evolution of primordial black holes (PBHs) in a universe with a variable gravitational constant and bulk viscosity. We have found that the strength of gravity has changed appreciably in the early universe. The gravitational constant attained its greatest value at t = 10 −23 sec a ..."
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We have studied the evolution of primordial black holes (PBHs) in a universe with a variable gravitational constant and bulk viscosity. We have found that the strength of gravity has changed appreciably in the early universe. The gravitational constant attained its greatest value at t = 10 −23 sec
Computations of primordial black hole formation
, 1405
"... Abstract. Results are presented from general relativistic numerical computations of primordial blackhole formation during the radiationdominated era of the universe. Growingmode perturbations are specified within the linear regime and their subsequent evolution is followed as they become nonlinea ..."
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Cited by 5 (0 self)
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Abstract. Results are presented from general relativistic numerical computations of primordial blackhole formation during the radiationdominated era of the universe. Growingmode perturbations are specified within the linear regime and their subsequent evolution is followed as they become
Formation of MACHOPrimordial Black Holes in Inflationary Cosmology
, 1995
"... As a nonbaryonic explanation of massive compact halo objects, a phenomenological model is presented which predicts formation of primordial black holes at a desired mass scale. The required feature of initial density fluctuation is realized making use of the primordially isocurvature fluctuation gene ..."
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As a nonbaryonic explanation of massive compact halo objects, a phenomenological model is presented which predicts formation of primordial black holes at a desired mass scale. The required feature of initial density fluctuation is realized making use of the primordially isocurvature fluctuation
Cosmological Constraints from Primordial Black Holes
, 1998
"... Primordial black holes may form in the early Universe, for example from the collapse of large amplitude density perturbations predicted in some inflationary models. Light black holes undergo Hawking evaporation, the energy injection from which is constrained both at the epoch of nucleosynthesis and ..."
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Cited by 4 (1 self)
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Primordial black holes may form in the early Universe, for example from the collapse of large amplitude density perturbations predicted in some inflationary models. Light black holes undergo Hawking evaporation, the energy injection from which is constrained both at the epoch of nucleosynthesis
PRIMORDIAL BLACK HOLES AND HOT MATTER
, 2001
"... Microscopic black holes explode with their temperature varying inversely as their mass. Such explosions would lead to the highest temperatures in the present universe, all the way to the Planck energy. The possibility that a quasistationary shell of hot matter surrounds these black holes has recent ..."
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Microscopic black holes explode with their temperature varying inversely as their mass. Such explosions would lead to the highest temperatures in the present universe, all the way to the Planck energy. The possibility that a quasistationary shell of hot matter surrounds these black holes has
Calculating the mass fraction of primordial black holes
, 2014
"... We reinspect the calculation for the mass fraction of primordial black holes (PBHs) which are formed from primordial perturbations, finding that performing the calculation using the comoving curvature perturbation Rc in the standard way vastly overestimates the number of PBHs, by many orders of magn ..."
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Cited by 1 (1 self)
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We reinspect the calculation for the mass fraction of primordial black holes (PBHs) which are formed from primordial perturbations, finding that performing the calculation using the comoving curvature perturbation Rc in the standard way vastly overestimates the number of PBHs, by many orders
Results 11  20
of
18,945