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Black Hole Spectroscopy in Environments: Detectability Prospects.

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Environmental effects do not significantly alter the black hole ringdown signal detected by future gravitational wave observatories. Ringdown-only analyses can reliably determine the remnant black hole's mass and spin.

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Area of Science:

  • Astrophysics
  • Gravitational Wave Astronomy
  • Black Hole Physics

Background:

  • The ringdown phase of a binary black hole merger provides insights into remnant black hole properties.
  • Future gravitational wave detectors aim for higher precision, potentially detecting environmental influences.

Purpose of the Study:

  • To investigate the impact of black hole environments on the ringdown signal following binary coalescence.
  • To assess the reliability of ringdown-only analyses for remnant black hole characterization.

Main Methods:

  • Simulations of binary black hole mergers incorporating environmental effects.
  • Analysis of ringdown signals to compare with vacuum counterparts.
  • Evaluation against planned gravitational wave detector sensitivities.

Main Results:

  • Ringdown signals in astrophysical environments are indistinguishable from vacuum signals for planned detector sensitivities.
  • Spectral instabilities were found to be observationally irrelevant for ringdown signals.
  • Deviations from inspiral-only estimates may offer insights into environmental effects.

Conclusions:

  • Ringdown-only analyses are robust for determining the redshifted mass and spin of remnant black holes.
  • Environmental effects do not preclude accurate black hole parameter estimation from ringdown data.
  • Future observations can potentially characterize environmental influences by comparing inspiral and ringdown data.