Distinguishing compact objects in extreme-mass-ratio inspirals by gravitational waves
arXiv:2209.01110 · doi:10.3390/universe11010018
Abstract
Extreme-mass-ratio inspirals (EMRIs) are promising gravitational-wave (GW) sources for space-based GW detectors. EMRI signals typically have long durations, ranging from several months to several years, necessitating highly accurate GW signal templates for detection. In most waveform models, compact objects in EMRIs are treated as test particles without accounting for their spin, mass quadrupole, or tidal deformation. In this study, we simulate GW signals from EMRIs by incorporating the spin and mass quadrupole moments of the compact objects. We evaluate the accuracy of parameter estimation for these simulated waveforms using the Fisher Information Matrix (FIM) and find that the spin, tidal-induced quadruple, and spin-induced quadruple can all be measured with precision ranging from to , particularly for a mass ratio of . Assuming the ``true'' GW signals originate from an extended body inspiraling into a supermassive black hole, we compute the signal-to-noise ratio (SNR) and Bayes factors between a test-particle waveform template and our model, which includes the spin and quadrupole of the compact object. Our results show that the spin of compact objects can produce detectable deviations in the waveforms across all object types, while tidal-induced quadrupoles are only significant for white dwarfs, especially in cases approaching an intermediate-mass ratio. Spin-induced quadrupoles, however, have negligible effects on the waveforms. Therefore, our findings suggest that it is possible to distinguish primordial black holes from white dwarfs, and, under certain conditions, neutron stars can also be differentiated from primordial black holes.
arXiv comment24 pages, 9 figures
References in corpus (42)
- Observation of Gravitational Waves from a Binary Black Hole Merger
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Gravitational Waves from Mergin Compact Binaries: How Accurately Can One Extract the Binary's Parameters from the Inspiral Waveform?
- Primordial Black Hole Scenario for the Gravitational-Wave Event GW150914
- Relativistic theory of tidal Love numbers
- Magnetically Arrested Disk: An Energetically Efficient Accretion Flow
- Detection, Measurement and Gravitational Radiation
- Intermediate and Extreme Mass-Ratio Inspirals -- Astrophysics, Science Applications and Detection using LISA
- "Kludge" gravitational waveforms for a test-body orbiting a Kerr black hole
- Quadrupole moments of rotating neutron stars
- The Initial Spin Probability Distribution of Primordial Black Holes
- Approximating the inspiral of test bodies into Kerr black holes
- Probing Planckian corrections at the horizon scale with LISA binaries
- The Evolution of Primordial Black Holes and their Final Observable Spins
- Improved approximate inspirals of test-bodies into Kerr black holes
- Dynamics of spinning test particles in Kerr spacetime
- Tidal deformability and I-Love-Q relations for gravastars with polytropic thin shells
- LISA extreme-mass-ratio inspiral events as probes of the black hole mass function
- Extreme Mass-Ratio Inspirals in the Effective-One-Body Approach: Quasi-Circular, Equatorial Orbits around a Spinning Black Hole
- Innermost Stable Circular Orbit of a Spinning Particle in Kerr Spacetime
- Effect of gravitational radiation reaction on nonequatorial orbits around a Kerr black hole
- On general relativistic uniformly rotating white dwarfs
- Spin Distribution of Primordial Black Holes
- A survey of spinning test particle orbits in Kerr spacetime
- Influence of internal structure on the motion of test bodies in extreme mass ratio situations
- Assessing the detectability of the secondary spin in extreme mass-ratio inspirals with fully-relativistic numerical waveforms
- How to assess the primordial origin of single gravitational-wave events with mass, spin, eccentricity, and deformability measurements
- Accuracy of gravitational waveform models for observing neutron-star--black-hole binaries in Advanced LIGO
- Love in Extrema Ratio
- Signature of chaos in gravitational waves from a spinning particle
- Importance of including small body spin effects in the modelling of extreme and intermediate mass-ratio inspirals
- Can we probe Planckian corrections at the horizon scale with gravitational waves?
- Testing general relativity with gravitational-wave catalogs: the insidious nature of waveform systematics
- Spins of primordial black holes formed in different cosmological scenarios
- Gravitational-wave constraints on the GWTC-2 events by measuring the tidal deformability and the spin-induced quadrupole moment
- Extreme Love in the SPA: constraining the tidal deformability of supermassive objects with extreme mass ratio inspirals and semi-analytical, frequency-domain waveforms
- Gravitational wave emission under general parametrized metric from extreme mass ratio inspirals
- Population inference of spin-induced quadrupole moments as a probe for non-black hole compact binaries
- Extreme-Value Statistics of the Spin of Primordial Black Holes
- Repeating Nuclear Transients as Candidate Electromagnetic Counterparts of LISA Extreme Mass Ratio Inspirals
- Dynamics of extended bodies with spin-induced quadrupole in Kerr spacetime: generic orbits
- I-Love-Q Relations for Realistic White Dwarfs