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Astrophysical Journal, ISSN 0004-637X, 12/2016, Volume 833, Issue 1, p. 61
We investigate primordial black hole formation in the matter-dominated phase of the universe, where nonspherical effects in gravitational collapse play a... 
black hole physics | stars: black holes | early universe | ASTRONOMY & ASTROPHYSICS | Gravitational effects | Black holes | Radiation | Gravitational collapse | Variations | Universe | Probability distribution
Journal Article
EPJ Web of Conferences, ISSN 2101-6275, 01/2018, Volume 168, p. 2002
Gravitational collapse of a massless scalar field with the periodic boundary condition in a cubic box is reported. This system can be regarded as a lattice... 
Gravitation | Amplitudes | Cubic lattice | Expanding universe theory | Gravitational collapse | Boundary conditions | Universe
Conference Proceeding
Journal of Cosmology and Astroparticle Physics, 10/2016, Volume 2016, Issue 10
Journal Article
General Relativity and Gravitation, ISSN 0001-7701, 9/2019, Volume 51, Issue 9, pp. 1 - 14
Journal Article
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN 1475-7516, 09/2019, Volume 2019, Issue 9, pp. 33 - 33
We discuss the effect of local type non-Gaussianity on the abundance of primordial black holes (PBH) based on the peak theory. We provide the PBH formation... 
GR black holes | PERTURBATIONS | primordial black holes | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS
Journal Article
CLASSICAL AND QUANTUM GRAVITY, ISSN 0264-9381, 04/2019, Volume 36, Issue 7, p. 75004
Gravitational collapse of a massless scalar field with the periodic boundary condition in a cubic box is reported. This system can be regarded as a lattice... 
black hole | QUANTUM SCIENCE & TECHNOLOGY | PHYSICS, MULTIDISCIPLINARY | ASTRONOMY & ASTROPHYSICS | lattice universe | gravitational collapse | PHYSICS, PARTICLES & FIELDS
Journal Article
Nuclear Physics, Section B, ISSN 0550-3213, 2010, Volume 825, Issue 1, pp. 231 - 241
We study another realization of the Kerr/CFT correspondence. By imposing new asymptotic conditions for the near-horizon geometry of Kerr black hole, an... 
ASYMPTOTIC SYMMETRIES | BLACK HOLE/CFT CORRESPONDENCE | CHARGES | PHYSICS, PARTICLES & FIELDS | Coordination compounds | Physics - High Energy Physics - Theory
Journal Article
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 04/2013, Volume 87, Issue 8
We propose the use of modulated spectra of astronomical sources due to gravitational lensing to probe Ellis wormholes. The modulation factor due to... 
MATTER | GEOMETRICAL-OPTICS | APPROXIMATION | ASTRONOMY & ASTROPHYSICS | MAGELLANIC CLOUDS | PHYSICS, PARTICLES & FIELDS | Physics - General Relativity and Quantum Cosmology
Journal Article
Classical and Quantum Gravity, ISSN 0264-9381, 08/2015, Volume 32, Issue 15, pp. 155003 - 155027
To clarify the observational consequences of bubble nucleations in an inflationary era, we analyze the dynamics of a spherical domain wall in an expanding... 
black hole | junction condition | domain wall | VACUUM | QUANTUM SCIENCE & TECHNOLOGY | PHYSICS, MULTIDISCIPLINARY | ASTRONOMY & ASTROPHYSICS | THIN SHELLS | DYNAMICS | NEUTRALIZATION | PHYSICS, PARTICLES & FIELDS | Collapse | Fluids | Dust | Dynamics | Domain walls | Universe | Mathematical models | Quantum gravity | Physics - General Relativity and Quantum Cosmology
Journal Article
Physical Review Letters, ISSN 0031-9007, 10/2013, Volume 111, Issue 16, p. 161102
Time evolution of a black hole lattice toy model universe is simulated. The vacuum Einstein equations in a cubic box with a black hole at the origin are... 
PHYSICS, MULTIDISCIPLINARY
Journal Article
Classical and Quantum Gravity, ISSN 0264-9381, 07/2016, Volume 33, Issue 15, p. 155007
Pulsars orbiting around the black hole (BH) at our galactic center provide us with a unique testing site for gravity. In this work, we propose an approach to... 
black hole | post-Newtonian | test of gravity | QUANTUM SCIENCE & TECHNOLOGY | RELATIVISTIC CELESTIAL MECHANICS | PHYSICS, MULTIDISCIPLINARY | ASTRONOMY & ASTROPHYSICS | BINARY-SYSTEMS | PULSAR | PHYSICS, PARTICLES & FIELDS | Physics - General Relativity and Quantum Cosmology
Journal Article
Classical and Quantum Gravity, ISSN 0264-9381, 04/2017, Volume 34, Issue 10, p. 105010
We simulate the spindle gravitational collapse of a collisionless particle system in a 3D numerical relativity code and compare the qualitative results with... 
numerical relativity | naked singularity | gravitational collapse | BLACK-HOLE FORMATION | QUANTUM SCIENCE & TECHNOLOGY | PHYSICS, MULTIDISCIPLINARY | ASTRONOMY & ASTROPHYSICS | NAKED SINGULARITIES | PHYSICS, PARTICLES & FIELDS | Physics - General Relativity and Quantum Cosmology
Journal Article
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 10/2013, Volume 88, Issue 8
Based on a physical argument, we derive a new analytic formula for the amplitude of density perturbation at the threshold of primordial black hole formation in... 
EQUATIONS | GRAVITATIONAL COLLAPSE | ASTRONOMY & ASTROPHYSICS | MASS | PHYSICS, PARTICLES & FIELDS
Journal Article
Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 03/2018, Volume 2018, Issue 3, pp. 33 - 33
We derive an observational constraint on a spherical inhomogeneity of the void centered at our position from the angular power spectrum of the cosmic microwave... 
cosmic flows | dark energy theory | supernova type Ia - standard candles | cosmological parameters from CMBR | standard candles | ASTRONOMY & ASTROPHYSICS | super-nova type Ia | PHYSICS, PARTICLES & FIELDS
Journal Article
Progress of Theoretical and Experimental Physics, ISSN 2050-3911, 2018, Volume 2018, Issue 12
The production rate of primordial black holes (PBHs) is often calculated by considering a nearly Gaussian distribution of cosmological perturbations, and... 
PHYSICS, MULTIDISCIPLINARY | GRAVITATIONAL COLLAPSE | PHYSICS, PARTICLES & FIELDS
Journal Article
EPL, ISSN 0295-5075, 02/2015, Volume 109, Issue 3, pp. 39001 - p1-39001-p6
We investigate the effect of small-scale inhomogeneities on standard candle observations, such as type-Ia supernovae (SNe) observations. The existence of the... 
PHYSICS, MULTIDISCIPLINARY | UNIVERSES | Red shift | Inhomogeneities | Candles | Dyes | Small scale | Cosmic microwave background | Deviation | Smoothness | Standards
Journal Article
EPL (Europhysics Letters), ISSN 0295-5075, 03/2010, Volume 89, Issue 6, p. 60001
The correspondence between the Kerr black hole and a boundary CFT has been conjectured recently. The conjecture has been proposed first only for the half of... 
PHYSICS, MULTIDISCIPLINARY | ASYMPTOTIC SYMMETRIES | BLACK HOLE/CFT CORRESPONDENCE | Algebra | Vices | Asymptotic properties | Black holes (astronomy) | Boundary conditions | Boundaries | Symmetry | Physics - High Energy Physics - Theory
Journal Article
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 02/2011, Volume 83, Issue 4
We study the redshift drift, i.e., the time derivative of the cosmological redshift in the Lemaitre-Tolman-Bondi (LTB) solution in which the observer is... 
ACCELERATION | ASTRONOMY & ASTROPHYSICS | CONSTANT | MODEL | SUPERNOVAE | ANISOTROPY | PHYSICS, PARTICLES & FIELDS
Journal Article
Classical and Quantum Gravity, ISSN 0264-9381, 10/2015, Volume 32, Issue 21, pp. 215028 - 215042
The ratio of total mass m(*) to the surface radius r(*) of a spherical perfect fluid ball has an upper bound, Gm(*)(c2r(*)) <= beta Buchdahl (1959 Phys. Rev.... 
unstable circular orbit of photons | variational method | compact object | mass-to-radius ratio | PHYSICS, MULTIDISCIPLINARY | BOUNDS | ASTRONOMY & ASTROPHYSICS | BLACK-HOLE | PHYSICS, PARTICLES & FIELDS | Fluids | Computational fluid dynamics | Upper bounds | Mathematical analysis | Mathematical models | Sound | Density | Quantum gravity
Journal Article
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 11/2015, Volume 92, Issue 10
Usually the effects of isotropic inhomogeneities are not seriously taken into account in the determination of the cosmological parameters because of the... 
UNCERTAINTY | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | Gravitation | Inhomogeneities | Copernican principle | Equations of state | Systematic errors | Cosmology | Universe
Journal Article
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