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Black hole

Bigravity black hole and its thermodynamics

Bigravity black hole and its thermodynamics

... One may be concerned that imposing all these condi- tions require severe fine tuning and the solution is highly nongeneric. Note, however, that this fine tuning must not be imposed. The parameters Q, m, M of the ...

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Exploring an unknown graph to locate a black hole using tokens

Exploring an unknown graph to locate a black hole using tokens

... Recently the exploration problem has been examined also when the network is unsafe [5, 8, 9, 10, 11, 16]. The danger considered is the presence in the network of a black hole ( Bh ), a node that disposes of ...

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An Extreme Rotating Black Hole in New Massive Gravity Theory

An Extreme Rotating Black Hole in New Massive Gravity Theory

... spacetime. Black hole solutions have been found in this theory, in particular an asymptotically anti-de Sitter rotating black ...horizon, black hole area and distance to the horizon, ...

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Massive black hole binary mergers within subparsec scale gas discs

Massive black hole binary mergers within subparsec scale gas discs

... In this paper we studied the interaction of a supermassive binary black hole with a self-gravitating circumbinary gaseous disc. Our focus has been on subparsec scales, where binary hardening due to stellar ...

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Emergent flux from particle collisions near a Kerr black hole

Emergent flux from particle collisions near a Kerr black hole

... where d V 1;2 denotes the velocity space of the colliding particles. The preceding equation tells us the number of annihilations taking place locally. Our objective is of course to find the flux of massless particles ...

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Exclusion of black hole disaster scenarios at the LHC

Exclusion of black hole disaster scenarios at the LHC

... The subscript in (M 2 ) refers to the fact that this is evolution sce- nario number two. Eq. (12) suggests that for (d > 1) the growth rate due to thermal motion inside of the earth would be too slow to do any harm ...

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Is there an upper limit to black hole masses?

Is there an upper limit to black hole masses?

... of black hole (BH) demographics locally are increas- ingly providing a strong constraint on models that explain the as- sembly and growth of BHs in the ...ultra-massive black holes (UMBHs) 1 ought to ...

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Gravitational lensing effects on detection of gravitational waves from black hole binary systems

Gravitational lensing effects on detection of gravitational waves from black hole binary systems

... of black hole binary systems), gravitational waves provide a new powerful way to study astrophysical and cosmological phenomena, com- plementary but essentially different to the study of the electromagnetic ...

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Limiting eccentricity of subparsec massive black hole binaries surrounded by self gravitating gas discs

Limiting eccentricity of subparsec massive black hole binaries surrounded by self gravitating gas discs

... Supermassive black hole (BH) binaries are currently postulated to form in the aftermath of galaxy mergers (Begelman et ...central black holes are con- ducive to the formation of eccentric BH binaries ...

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The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole

The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole

... If black hole spin were the dominant factor in setting jet power, we would have expected ASASSN-15lh to host a jet at least comparable in strength to ASASSN-14li (as we have inferred a high black ...

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Hawking versus Unruh effects, or the difficulty of slowly crossing a black hole horizon

Hawking versus Unruh effects, or the difficulty of slowly crossing a black hole horizon

... a black hole spacetime in the Unruh state and an uniformly accelerating observer in a Minkowski spacetime in the Minkowski vacuum, considering that both situations are parallel and should not be ...

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Evidence for Three Accreting Black Holes in a Galaxy at z ~ 1 35: A Snapshot of Recently Formed Black Hole Seeds?

Evidence for Three Accreting Black Holes in a Galaxy at z ~ 1 35: A Snapshot of Recently Formed Black Hole Seeds?

... massive black holes may thus lurk just below the detection limit of deep X-ray AGN ...low-mass black holes in z ∼ ...of black hole for- mation and growth in the universe and the physical ...

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The supermassive black hole coincident with the luminous transient ASASSN 15lh

The supermassive black hole coincident with the luminous transient ASASSN 15lh

... Metzger et al. 2015; Bersten et al. 2016; Kozyreva et al. 2016; Coughlin & Armitage 2018; Sukhbold & Woosley 2016), which have attempted to explain its remarkable observational features. ASASSN-15lh was initially ...

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The Cosmic History of Black Hole Growth from Deep Multiwavelength Surveys

The Cosmic History of Black Hole Growth from Deep Multiwavelength Surveys

... supermassive black hole is initially completely surrounded by dust, before radiation pressure removes it and a “classical” unobscured quasar is visible ...

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Hierarchical data driven modelling of binary Black hole mergers

Hierarchical data driven modelling of binary Black hole mergers

... Numerical relativity is an essential tool in studying the coalescence of binary black hole systems (BBHs). It is still computationally prohibitive to cover the BBH parameter space exhaustively, making ...

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Renormalization group improved black hole space time in large extra dimensions;

Renormalization group improved black hole space time in large extra dimensions;

... this zero splits up into two zeros, where the outer zero corresponds to the apparent event horizon. As also shown in figure (1) this outer horizon grows for large BH masses (r → ∞) and approaches the classical event ...

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Renormalization group improved black hole space time in large extra dimensions

Renormalization group improved black hole space time in large extra dimensions

... By taking into account a running of the gravitational coupling constant with an ultra violet fixed point, an improvement of classical black hole spacetimes in extra dimensions is studied. It is found that ...

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Bose Einstein graviton condensate in a Schwarzschild black hole

Bose Einstein graviton condensate in a Schwarzschild black hole

... that black holes could be treated as consisting of a Bose – Einstein condensate of ...the black hole gravitational ...the black hole ...the black hole characteristics ...

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Quasilocal first law for black hole thermodynamics

Quasilocal first law for black hole thermodynamics

... with black holes in quantum gravity is that, as they evaporate, the usual defini- tion based on global structure of spacetime is ill ...large black hole radiating very little and, thus, remaining ...

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Black hole spin and radio loudness in a Lambda cold dark matter universe

Black hole spin and radio loudness in a Lambda cold dark matter universe

... We use a combination of a cosmological N-body simulation of the concordance cold dark matter paradigm and a semi-analytic model of galaxy formation to investigate the spin development of central supermassive black ...

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