On gravitational-wave echoes from neutron-star binary coalescences
arXiv:1804.01444 · doi:10.1088/1361-6382/aacb8f
Abstract
A tentative detection of gravitational-wave echoes in the post-merger signal of GW170817 has been recently claimed at significance level. It has been speculated that the signal might provide evidence for near-horizon quantum structures in the remnant exotic object. We point out that if the remnant object is an ultracompact neutron star, echoes are expected for objects with radius only slightly smaller than that of an ordinary neutron star. The reported echoes at ~72 Hz are compatible with a toy model of incompressible star with mass approximately and radius close to the Buchdahl limit, R~9GM/(4c^2). If confirmed, low-frequency gravitational-wave echoes would be in tension with all current neutron-star models and would have dramatic implications for nuclear physics and gravity.
v3: 4 pages, 2 figures, extended discussion, results unchanged. Version accepted in CQG Letters
References in corpus (21)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Neutron Star Observations: Prognosis for Equation of State Constraints
- Black holes as mirrors: quantum information in random subsystems
- Echoes of ECOs: gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale
- Tests for the existence of horizons through gravitational wave echoes
- Light rings as observational evidence for event horizons: long-lived modes, ergoregions and nonlinear instabilities of ultracompact objects
- Echoes of Kerr-like wormholes
- A recipe for echoes from exotic compact objects
- Ergoregion instability of ultra-compact astrophysical objects
- Gravitational Wave Signatures of Highly Compact Boson Star Binaries
- Low significance of evidence for black hole echoes in gravitational wave data
- Gravitational wave echoes through new windows
- On the ergoregion instability in rotating gravastars
- Instability of hyper-compact Kerr-like objects
- Black Hole Echology: The Observer's Manual
- Echoes from the Abyss: The Holiday Edition!
- Characterization of echoes: A Dyson-series representation of individual pulses
- Comments on: "Echoes from the abyss: Evidence for Planck-scale structure at black hole horizons"
- Gravitational wave echoes from strange stars
- Are gravitational wave ringdown echoes always equal-interval ?
- Comment on: "Low significance of evidence for black hole echoes in gravitational wave data"
Cited by in corpus (41)
- Testing the nature of dark compact objects: a status report
- Tests of General Relativity with Binary Black Holes from the second LIGO-Virgo Gravitational-Wave Transient Catalog
- New Horizons for Fundamental Physics with LISA
- Shadows of spherically symmetric black holes and naked singularities
- Phenomenological aspects of black holes beyond general relativity
- Anisotropic stars as ultracompact objects in General Relativity
- Ergoregion instability of exotic compact objects: electromagnetic and gravitational perturbations and the role of absorption
- How does a dark compact object ringdown?
- Analytical model for gravitational-wave echoes from spinning remnants
- Analytical template for gravitational-wave echoes: signal characterization and prospects of detection with current and future interferometers
- Black-hole microstate spectroscopy: ringdown, quasinormal modes, and echoes
- On gravitational echoes from ultracompact exotic stars
- The stochastic gravitational-wave background in the absence of horizons
- Probing the Nature of Black Holes: Deep in the mHz Gravitational-Wave Sky
- Compactness bounds in General Relativity
- Dark Energy Stars with Phantom Field
- Strange stars in gravity Palatini formalism and gravitational wave echoes from them
- Gravitational wave echoes from compact stars in gravity
- Radial oscillations and gravitational wave echoes of strange stars for various equations of state
- Nonlinear treatment of a black hole mimicker ringdown
- Echoes from Classical Black Holes
- Gravitational wave echoes from interacting quark stars
- Echoes from backreacting exotic compact objects
- Ringing and echoes from black bounces surrounded by the string cloud
- Topological neutron stars in tensor-multi-scalar theories of gravity
- Testing the nature of dark compact objects with gravitational waves
- Rescaling strange-cluster stars and its implications on gravitational-wave echoes
- Spherically symmetric elastic bodies in general relativity
- Radial oscillations and gravitational wave echoes of strange stars with nonvanishing lambda
- New Kind of Echo from Quantum Black Holes
- The Fredholm Approach to Charactize Gravitational Wave Echoes
- Universality of the Buchdahl sphere
- Black hole spectroscopy and nonlinear echoes in Einstein-Maxwell-scalar theory
- Semiclassical Effects in Color Flavor Locked Strange Stars
- Tail wavelets in the merger of binary compact objects
- Gravitational wave echoes from strange stars for various equations of state
- An Ultra-compact Object from Semi-classical Gravity
- Graviton Condensate Stars and Its Gravitational Echoes
- Resonances, black hole mimickers and the greenhouse effect: consequences for gravitational-wave physics
- Quintessence-Chameleon transitions in anisotropic Kiselev model of neutron stars
- Compact elastic objects in general relativity