Mass of a Black Hole Firewall

Abramowicz, Marek A.; Kluźniak, W.; Lasota, Jean–Pierre

doi:10.1103/physrevlett.112.091301

Cited by 19 publications

(70 citation statements)

References 9 publications

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“…Thus, this back-of-the-envelope calculation predicts that the main splash of radiation, consisting on ringdown of an isolated BH, is quickly followed by ringdown in the modes of the composite BH plus firewall system. In summary, we predict changes in the GW signal which can be significant if the firewall model is correct, the actual number depends (linearly) on the total mass of the firewall shell, which is still a subject of debate [139,140].…”

Section: Relation With "Firewalls" and Other Exotica Around Massmentioning

confidence: 99%

Can environmental effects spoil precision gravitational-wave astrophysics?

2014

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No, within a broad class of scenarios. Gravitational-wave (GW) astronomy will open a new window on compact objects such as neutron stars and black holes (BHs). It is often stated that large signal-to-noise detections of ringdown or inspiral waveforms can provide estimates of the masses and spins of compact objects to within fractions of a percent, as well as tests of General Relativity. These expectations usually neglect the realistic astrophysical environments in which compact objects live. With the advent of GW astronomy, environmental effects on the GW signal will eventually have to be quantified. Here we present a wide survey of the corrections due to these effects in two situations of great interest for GW astronomy: the BH ringdown emission and the inspiral of two compact objects (especially BH binaries). We mainly focus on future space-based detectors such as eLISA, but many of our results are also valid for ground-based detectors such as aLIGO, aVirgo and KAGRA. We take into account various effects such as: electric charges, magnetic fields, cosmological evolution, possible deviations from General Relativity, firewalls, and the effects related to various forms of matter such as accretion disks and dark matter halos.Our analysis predicts the existence of resonances dictated by the external mass distribution, which dominate the very late-time behavior of merger/ringdown waveforms. The mode structure can drastically differ from the vacuum case, yet the BH response to external perturbations is unchanged at the time scales relevant for detectors. This is because although the vacuum Schwarzschild resonances are no longer quasinormal modes of the system, they still dominate the response at intermediate times. Our results strongly suggest that both parametrized and ringdown searches should use at least two-mode templates.Our analysis of compact binaries shows that environmental effects are typically negligible for most eLISA sources, with the exception of very few special extreme mass ratio inspirals. We show in particular that accretion and hydrodynamic drag generically dominate over self-force effects for geometrically thin disks, whereas they can be safely neglected for geometrically thick disk environments, which are the most relevant for eLISA. Finally, we discuss how our ignorance of the matter surrounding compact objects implies intrinsic limits on the ability to constrain strong-field deviations from General Relativity.

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Section: Relation With "Firewalls" and Other Exotica Around Massmentioning

confidence: 99%

Can environmental effects spoil precision gravitational-wave astrophysics?

2014

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“…This regime is at present conspicuously poorly understood, and not exempt of problems [12] (a rare exception is a dilaton gravity model [9] in which the paradox turns out to be resolved by a remnant rather than by a firewall). While our results do not settle the viability of the firewall argument, they do identify the arena in which the viability will be settled.…”

mentioning

confidence: 99%

“…Modeling the gravitational aspects of this proposed singularity has remained elusive. For instance, the emergence of a Planck scale shell near the horizon of an astrophysical black hole seems to be in tension with the gravitational dynamics predicted by general relativity [12]. Nevertheless, the nongravitational aspects of the "firewall" version of the singularity [3] can be modeled with a quantum field in Minkowski spacetime: a state in which correlations across a Rindler horizon are severed can be written down by hand [13], mimicking the severing that the firewall argument of [3] posits to develop dynamically during black hole evaporation.…”

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confidence: 99%

(1+1)DCalculation Provides Evidence that Quantum Entanglement Survives a Firewall

Martín-Martínez

Louko

2015

Phys. Rev. Lett.

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We analyze how pre-existing entanglement between two Unruh-DeWitt particle detectors evolves when one of the detectors falls through a Rindler firewall in (1+1)-dimensional Minkowski space. The firewall effect is minor and does not wash out the detector-detector entanglement, in some regimes even preserving the entanglement better than Minkowski vacuum. The absence of cataclysmic events should continue to hold for young black hole firewalls. A firewall's prospective ability to resolve the information paradox must hence hinge on its detailed gravitational structure, presently poorly understood.Introduction.-If black hole evaporation preserves unitarity, it has been argued from preservation of correlations that the horizon of a shrinking black hole must develop a singularity even when the evaporation is still slow and the black hole remains macroscopic [1-3] (for a selection of debate and reviews see [4][5][6][7][8][9][10][11]). Modeling the gravitational aspects of this proposed singularity has remained elusive. For instance, the emergence of a Planck scale shell near the horizon of an astrophysical black hole seems to be in tension with the gravitational dynamics predicted by general relativity [12]. Nevertheless, the nongravitational aspects of the "firewall" version of the singularity [3] can be modeled with a quantum field in Minkowski spacetime: a state in which correlations across a Rindler horizon are severed can be written down by hand [13], mimicking the severing that the firewall argument of [3] posits to develop dynamically during black hole evaporation. This severing of correlations has strong similarities to that which ensues on the sudden insertion of a reflective wall in a spacetime [14,15]. The Rindler firewall state can be studied by usual quantum field theory techniques, and the conclusions should apply to young gravitational firewalls where the backreaction on the metric is still small.

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“…Finally it was recently shown that Einstein's field equations do not admit a solution in which a Planck-density, Planck-scale firewall is just outside the event horizon [153]. Any shell located at the horizon of an astrophysical black hole must necessarily have a density many orders of magnitude lower than the Planck density.…”

Section: Loopholesmentioning

confidence: 99%

The Firewall Phenomenon

Mann

2014

Fundamental Theories of Physics

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Black holes have presented us with some of the most baffling paradoxes in physics. From their original conception as dark stars, they have come to be understood as physical systems with their own thermodynamic behaviour. This same behaviour leads to paradoxical conflicts between some of the basic principles of physics whose resolution is not straightforward and that suggest a new structureknown as a firewall-may be present. This chapter provides an overview of the firewall problem, as it emerges from our understanding of black hole thermodynamics.

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Mass of a Black Hole Firewall

Cited by 19 publications

References 9 publications

Can environmental effects spoil precision gravitational-wave astrophysics?

Can environmental effects spoil precision gravitational-wave astrophysics?

(1+1)DCalculation Provides Evidence that Quantum Entanglement Survives a Firewall

The Firewall Phenomenon

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