822 citations · 4.8k across the 39 of their papers we have counts for
31 papers · 1 filter
Waveform Modelling for the Laser Interferometer Space Antenna
LISA Consortium Waveform Working Group, Niayesh Afshordi, Sarp Akçay +144
LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave astronomy. As the first anticipated space-based gravitational-wave detector, it will exp…
Outlook for detecting the gravitational wave displacement and spin memory effects with current and future gravitational wave detectors
Alexander M. Grant, David A. Nichols
Gravitational wave memory effects arise from non-oscillatory components of gravitational wave signals, and they are predictions of general relativity in the nonlinear regime that h…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Persistent gravitational wave observables: Curve deviation in asymptotically flat spacetimes
Alexander M. Grant, David A. Nichols
In the first paper in this series, a class of observables that generalized the gravitational wave memory effect were introduced and given the name "persistent gravitational wave ob…
Classical and Quantized General-Relativistic Angular Momentum
Geoffrey Compère, David A. Nichols
Angular momentum at null infinity has a supertranslation ambiguity from the lack of a preferred Poincaré group and a similar ambiguity when the center-of-mass position changes as l…
Definitions of (super) angular momentum in asymptotically flat spacetimes: Properties and applications to compact-binary mergers
Arwa Elhashash, David A. Nichols
The symmetries of asymptotically flat spacetimes in general relativity are given by the Bondi-Metzner-Sachs (BMS) group, though there are proposed generalizations of its symmetry a…
Brans-Dicke theory in Bondi-Sachs form: Asymptotically flat solutions, asymptotic symmetries and gravitational-wave memory effects
Shammi Tahura, David A. Nichols, Alexander Saffer +2
Gravitational-wave memory effects are identified by their distinctive effects on families of freely falling observers: after a burst of waves pass by their locations, memory effect…
Persistent gravitational wave observables: Nonlinear plane wave spacetimes
Éanna É. Flanagan, Alexander M. Grant, Abraham I. Harte +1
In the first paper in this series, we introduced "persistent gravitational wave observables" as a framework for generalizing the gravitational wave memory effect. These observables…
Persistent gravitational wave observables: general framework
Éanna É. Flanagan, Alexander M. Grant, Abraham I. Harte +1
The gravitational wave memory effect is characterized by the permanent relative displacement of a pair of initially comoving test particles that is caused by the passage of a burst…
Center-of-mass angular momentum and memory effect in asymptotically flat spacetimes
David A. Nichols
Gravitational-wave (GW) memory effects are constant changes in the GW strain and its time integrals, which are closely connected to changes in the charges that characterize asympto…
Calibration of Advanced Virgo and Reconstruction of the Gravitational Wave Signal h(t) during the Observing Run O2
Virgo Collaboration, F. Acernese, T. Adams +281
In August 2017, Advanced Virgo joined Advanced LIGO for the end of the O2 run, leading to the first gravitational waves detections with the three-detector network. This paper descr…
Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…
Spin memory effect for compact binaries in the post-Newtonian approximation
David A. Nichols
The spin memory effect is a recently predicted relativistic phenomenon in asymptotically flat spacetimes that become nonradiative infinitely far in the past and future. Between the…
Prescriptions for measuring and transporting local angular momenta in general relativity
Éanna É. Flanagan, David A. Nichols, Leo C. Stein +1
For observers in curved spacetimes, elements of the dual space of the set of linearized Poincaré transformations from an observer's tangent space to itself can be naturally interpr…
Testing general relativity using golden black-hole binaries
Abhirup Ghosh, Archisman Ghosh, Nathan K. Johnson-McDaniel +8
The coalescences of stellar-mass black-hole binaries through their inspiral, merger, and ringdown are among the most promising sources for ground-based gravitational-wave (GW) dete…
Reply to "On the branching of quasinormal resonances of near-extremal Kerr black holes" by Shahar Hod
Aaron Zimmerman, Huan Yang, Fan Zhang +3
In a study of the quasinormal mode frequencies of nearly extremal black holes, we pointed out a bifurcation of the mode spectrum into modes with finite decay and modes with vanishi…
Properties of an affine transport equation and its holonomy
Justin Vines, David A. Nichols
An affine transport equation was used recently to study properties of angular momentum and gravitational-wave memory effects in general relativity. In this paper, we investigate lo…
Observer dependence of angular momentum in general relativity and its relationship to the gravitational-wave memory effect
Éanna É. Flanagan, David A. Nichols
We define a procedure by which observers can measure a type of special-relativistic linear and angular momentum at a point in a curved spacetime using only the spac…
Comparison of electromagnetic and gravitational radiation; what we can learn about each from the other
Richard H. Price, John W. Belcher, David A. Nichols
We compare the nature of electromagnetic fields and of gravitational fields in linearized general relativity. We carry out this comparison both mathematically and visually. In part…
Branching of quasinormal modes for nearly extremal Kerr black holes
Huan Yang, Fan Zhang, Aaron Zimmerman +3
We show that nearly extremal Kerr black holes have two distinct sets of quasinormal modes, which we call zero-damping modes (ZDMs) and damped modes (DMs). The ZDMs exist for all ha…
Visualizing Spacetime Curvature via Frame-Drag Vortexes and Tidal Tendexes III. Quasinormal Pulsations of Schwarzschild and Kerr Black Holes
David A. Nichols, Aaron Zimmerman, Yanbei Chen +5
In recent papers, we and colleagues have introduced a way to visualize the full vacuum Riemann curvature tensor using frame-drag vortex lines and their vorticities, and tidal tende…
Visualizing Spacetime Curvature via Frame-Drag Vortexes and Tidal Tendexes II. Stationary Black Holes
Fan Zhang, Aaron Zimmerman, David A. Nichols +5
When one splits spacetime into space plus time, the Weyl curvature tensor (which equals the Riemann tensor in vacuum) splits into two spatial, symmetric, traceless tensors: the tid…
Quasinormal-mode spectrum of Kerr black holes and its geometric interpretation
Huan Yang, David A. Nichols, Fan Zhang +3
There is a well-known, intuitive geometric correspondence between high-frequency QNMs of Schwarzschild black holes and null geodesics that reside on the light-ring : the real part…
Hybrid method for understanding black-hole mergers: Inspiralling case
David A. Nichols, Yanbei Chen
We adapt a method of matching post-Newtonian and black-hole-perturbation theories on a timelike surface (which proved useful for understanding head-on black-hole-binary collisions)…