Black hole physics and the universalities of superradiance and of grey-body radiation

Schiffer, M

doi:10.1007/BF02105668

Title: Black hole physics and the universalities of superradiance and of grey-body radiation

Full Record
Other Related Research

Abstract

In this essay the authors compare the response of a black hole to incoming radiation to that of a system consisting of a hot source hidden behind a semi-transparent mirror, and the two happen to agree. Then, they display a thermodynamical proof showing that this agreement is not incidental: it is a universal feature of an ideal grey body. As a by-product of this argument the universality of superradiance emerges: absorptive media in rotation, instead of damping incoming radiation, are responsible for its amplification for all superradiant modes. The main conclusion here is that the black hole response to incoming radiation and superandiance are not features that arise because black holes are {open_quotes}exceptional{close_quotes} systems but, on the contrary, because they are very {open_quotes}ordinary{close_quotes} in the sense that they fall into the category of ideal grey bodies.

Authors:

Schiffer, M ^[1]

Instituto de matematica, Campinas (Brazil)

Publication Date:: Sun Jan 01 00:00:00 EST 1995

Sponsoring Org.:: USDOE

OSTI Identifier:: 54554

Resource Type:: Journal Article

Journal Name:: General Relativity and Gravitation

Additional Journal Information:: Journal Volume: 27; Journal Issue: 1; Other Information: PBD: Jan 1995

Country of Publication:: United States

Language:: English

Subject:: 66 PHYSICS; BLACK HOLES; SUPERRADIANCE

Citation Formats


                    Schiffer, M. Black hole physics and the universalities of superradiance and of grey-body radiation.  United States: N. p., 1995. 
        Web.  doi:10.1007/BF02105668.

Copy to clipboard


                    Schiffer, M. Black hole physics and the universalities of superradiance and of grey-body radiation.  United States.  https://doi.org/10.1007/BF02105668

Copy to clipboard


                    Schiffer, M. 1995.  
        "Black hole physics and the universalities of superradiance and of grey-body radiation".  United States.  https://doi.org/10.1007/BF02105668.

Copy to clipboard


                    
@article{osti_54554,

  title        = {Black hole physics and the universalities of superradiance and of grey-body radiation},

  author       = {Schiffer, M},

  abstractNote = {In this essay the authors compare the response of a black hole to incoming radiation to that of a system consisting of a hot source hidden behind a semi-transparent mirror, and the two happen to agree. Then, they display a thermodynamical proof showing that this agreement is not incidental: it is a universal feature of an ideal grey body. As a by-product of this argument the universality of superradiance emerges: absorptive media in rotation, instead of damping incoming radiation, are responsible for its amplification for all superradiant modes. The main conclusion here is that the black hole response to incoming radiation and superandiance are not features that arise because black holes are {open_quotes}exceptional{close_quotes} systems but, on the contrary, because they are very {open_quotes}ordinary{close_quotes} in the sense that they fall into the category of ideal grey bodies.},

  doi          = {10.1007/BF02105668},

  url          = {https://www.osti.gov/biblio/54554},
  journal      = {General Relativity and Gravitation},
number       = 1,

  volume       = 27,

  place        = {United States},

  year         = {Sun Jan 01 00:00:00 EST 1995},

  month        = {Sun Jan 01 00:00:00 EST 1995}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1007/BF02105668

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Universality in grey-body radiance: Extending Kirchoff's law to the statistics of quanta

Journal Article Bekenstein, J; Schiffer, M - Physical Review Letters; (United States)

An ideal grey body is a macroscopic object with definite temperature which absorbs only a fraction of the radiation incident on it. Assuming that a grey body always emits in a mixed state, and that the radiation density matrix factors into matrices for the various frequency modes, we employ general arguments to derive the complete statistic of grey-body radiance elicited by incident radiation. These depend only on the temperature and the absorptivities for the various frequencies (hence are of universal form), and coincide with the statistics of black-hole radiance first derived a decade and a half ago.
https://doi.org/10.1103/PhysRevLett.72.2512
Grey Galaxies’ as an endpoint of the Kerr-AdS superradiant instability

Journal Article Kim, Seok; Kundu, Suman; Lee, Eunwoo; ... - Journal of High Energy Physics (Online)

Kerr-AdS_d+1 black holes for d ≥ 3 suffer from classical superradiant instabilities over a range of masses above extremality. We conjecture that these instabilities settle down into Grey Galaxies (GGs) — a new class of coarse-grained solutions to Einstein’s equations which we construct in d = 3. Grey Galaxies are made up of a black hole with critical angular velocity ω = 1 in the ‘centre’ of AdS, surrounded by a large flat disk of thermal bulk gas that revolves around the centre of AdS at the speed of light. The gas carries a finite fraction of the total energy,more »« less
https://doi.org/10.1007/jhep11(2023)024

Full Text Available
Instability of the Cauchy horizon of Reissner-Nordstroem black holes

Journal Article Matzner, R; Zamorano, N; Sandberg, V - Phys. Rev., D; (United States)

The stability of the inner Reissner-Nordstroem geometry is studied with test massless integer-spin fields. In contrast to previous mathematical treatments we present physical arguments for the processes involved and show that ray tracing and simple first-order scattering suffice to elucidate most of the results. Monochromatic waves which are of small amplitude and ingoing near the outer horizon develop infinite energy densities near the inner Cauchy horizon (as measured by a freely falling observer). Previous work has shown that certain derivatives of the field in a general (nonmonochromatic) disturbance must fall off exponentially near the inner (Cauchy) horizon (r = r/submore »« less
https://doi.org/10.1103/PhysRevD.19.2821
Black hole portal into hidden valleys

Journal Article Dubovsky, Sergei; Gorbenko, Victor - Physical Review. D, Particles Fields

Superradiant instability turns rotating astrophysical black holes into unique probes of light axions. We consider what happens when a light axion is coupled to a strongly coupled hidden gauge sector. In this case superradiance results in an adiabatic increase of a hidden sector CP-violating {theta} parameter in a near horizon region. This may trigger a first order phase transition in the gauge sector. As a result a significant fraction of a black hole mass is released as a cloud of hidden mesons and can be later converted into electromagnetic radiation. This results in a violent electromagnetic burst. The characteristic frequencymore »« less
https://doi.org/10.1103/PHYSREVD.83.106002
Classical instability of Kerr-AdS black holes and the issue of final state

Journal Article Cardoso, Vitor; Dias, Oscar; Yoshida, Shijun - Physical Review. D, Particles Fields

It is now established that small Kerr-anti-de Sitter (Kerr-AdS) black holes are unstable against scalar perturbations, via the superradiant amplification mechanism. We show that small Kerr-AdS black holes are also unstable against gravitational perturbations and we compute the features of this instability. We also describe with great detail the evolution of this instability. In particular, we identify its end-point state. It corresponds to a Kerr-AdS black hole whose boundary is an Einstein universe rotating with the light velocity. This black hole is expected to be slightly oblate and to coexist in equilibrium with a certain amount of outside radiation.
https://doi.org/10.1103/PHYSREVD.74.044008

Similar Records