Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP4.5k papers
- Yukawa Institute for Theoretical PhysicsJP2.7k papers
- The University of OsakaJP2.3k papers
- Nagoya UniversityJP2.2k papers
- High Energy Accelerator Research OrganizationJP2.2k papers
- Centre National de la Recherche ScientifiqueFR2.1k papers
- Tokyo Institute of TechnologyJP2k papers
- University of TsukubaJP1.7k papers
- Brookhaven National LaboratoryUS1.6k papers
- Stony Brook UniversityUS1.5k papers
- Waseda UniversityJP1.5k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.5k papers
24 papers · 2 filters
The linear stability of the post-Newtonian triangular equilibrium in the three-body problem
Kei Yamada, Takuya Tsuchiya
Continuing work initiated in an earlier publication [Yamada, Tsuchiya, and Asada, Phys. Rev. D 91, 124016 (2015)], we reexamine the linear stability of the triangular solution in t…
Towards Strong Field Tests of Beyond Horndeski Gravity Theories
Jeremy Sakstein, Eugeny Babichev, Kazuya Koyama +2
Theories of gravity in the beyond Horndeski class encompass a wide range of scalar-tensor theories that will be tested on cosmological scales over the coming decade. In this work,…
Hamiltonian Formulation of the Conservative Self-Force Dynamics in the Kerr Geometry
Ryuichi Fujita, Soichiro Isoyama, Alexandre Le Tiec +3
We formulate a Hamiltonian description of the orbital motion of a point particle in Kerr spacetime for generic (eccentric, inclined) orbits, which accounts for the effects of the c…
3D Simulation of Spindle Gravitational Collapse of a Collisionless Particle System
Chul-Moon Yoo, Tomohiro Harada, Hirotada Okawa
We simulate the spindle gravitational collapse of a collisionless particle system in a 3D numerical relativity code and compare the qualitative results with the old work done by Sh…
Horizon supertranslation and degenerate black hole solutions
Rong-Gen Cai, Shan-Ming Ruan, Yun-Long Zhang
In this note we first review the degenerate vacua arising from the BMS symmetries. According to the discussion in [1] one can define BMS-analogous supertranslation and superrotatio…
On the critical behaviour of gapped gravitational collapse in confined spacetime
Rong-Gen Cai, Li-Wei Ji, Run-Qiu Yang
The gravitational collapse of a massless scalar field enclosed with a perfectly reflecting wall in a spacetime with a cosmological constant is investigated. The mass scaling fo…
On the stability conditions for theories of modified gravity in presence of matter fields
Antonio De Felice, Noemi Frusciante, Georgios Papadomanolakis
We present a thorough stability analysis of modified gravity theories in the presence of matter fields. We use the Effective Field Theory framework for Dark Energy and Modified Gra…
Spinning, Precessing, Black Hole Binary Spacetime via Asymptotic Matching
Hiroyuki Nakano, Brennan Ireland, Manuela Campanelli +1
We briefly discuss a method to construct a global, analytic, approximate spacetime for precessing, spinning binary black holes. The spacetime construction is broken into three part…
General background conditions for K-bounce and adiabaticity
Antonio Enea Romano
We study the background conditions for a bounce uniquely driven by a single scalar field model with a generalized kinetic term , without any additional matter field. At the b…
Global adiabaticity and non-Gaussianity consistency condition
Antonio Enea Romano, Sander Mooij, Misao Sasaki
In the context of single-field inflation, the conservation of the curvature perturbation on comoving slices, , on super-horizon scales is one of the assumptions necessary to…
Relativistic Stars in Beyond Horndeski Theories
Eugeny Babichev, Kazuya Koyama, David Langlois +2
This work studies relativistic stars in beyond Horndeski scalar-tensor theories that exhibit a breaking of the Vainshtein mechanism inside matter, focusing on a model based on the…
Effective gravitational couplings for cosmological perturbations in generalized Proca theories
Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase +3
We consider the finite interactions of the generalized Proca theory including the sixth-order Lagrangian and derive the full linear perturbation equations of motion on the flat Fri…
Constraint on ghost-free bigravity from gravitational Cherenkov radiation
Rampei Kimura, Takahiro Tanaka, Kazuhiro Yamamoto +1
We investigate gravitational Cherenkov radiation in a healthy branch of background solutions in the ghost-free bigravity model. In this model, because of the modification of disper…
Estimate of the radius responsible for quasinormal modes in the extreme Kerr limit and asymptotic behavior of the Sasaki-Nakamura transformation
Hiroyuki Nakano, Norichika Sago, Takahiro Tanaka +1
The Sasaki-Nakamura transformation gives a short-ranged potential and a convergent source term for the master equation of perturbations in the Kerr space-time. In this paper, we st…
Simulations of inspiraling and merging double neutron stars using the Spectral Einstein Code
Roland Haas, Christian D. Ott, Bela Szilagyi +11
We present results on the inspiral, merger, and post-merger evolution of a neutron star - neutron star (NSNS) system. Our results are obtained using the hybrid pseudospectral-finit…
Measurability of the tidal deformability by gravitational waves from coalescing binary neutron stars
Kenta Hotokezaka, Koutarou Kyutoku, Yu-ichiro Sekiguchi +1
Combining new gravitational waveforms derived by long-term (14--16 orbits) numerical-relativity simulations with waveforms by an effective-one-body (EOB) formalism for coalescing b…
Cosmology in generalized Proca theories
Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase +3
We consider a massive vector field with derivative interactions that propagates only the 3 desired polarizations (besides two tensor polarizations from gravity) with second-order e…
Stationary bubbles: information loss paradox?
Guillem Domènech, Misao Sasaki
The main purpose of this work is to build classically stationary bubbles, within the thin-shell formalism, which are unstable under quantum effects; they either collapse into a bla…
Conformal frames in cosmology
Guillem Domènech, Misao Sasaki
From higher dimensional theories, e.g. string theory, one expects the presence of non-minimally coupled scalar fields. We review the notion of conformal frames in cosmology and emp…
The detection of quasinormal mode with would prove a sphere soaking in the ergoregion of the Kerr space-time
Hiroyuki Nakano, Takashi Nakamura, Takahiro Tanaka
Recent numerical relativity simulations of mergers of binary black holes suggest that the maximum final value of is for the coalescence of two equal mass black ho…
How close can we approach the event horizon of the Kerr black hole from the detection of the gravitational quasinormal modes?
Takashi Nakamura, Hiroyuki Nakano
Using the WKB method, we show that the peak location () of the potential, which determines the quasinormal mode frequency of the Kerr black hole, obeys an accurate em…
Numerical simulations of stellar collapse in scalar-tensor theories of gravity
Davide Gerosa, Ulrich Sperhake, Christian D. Ott
We present numerical-relativity simulations of spherically symmetric core collapse and compact-object formation in scalar-tensor theories of gravity. The additional scalar degree o…
Effects of neutron-star dynamic tides on gravitational waveforms within the effective-one-body approach
Tanja Hinderer, Andrea Taracchini, Francois Foucart +11
Extracting the unique information on ultradense nuclear matter from the gravitational waves emitted by merging, neutron-star binaries requires robust theoretical models of the sign…
Screening fifth forces in generalized Proca theories
Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase +3
For a massive vector field with derivative self-interactions, the breaking of the gauge invariance allows the propagation of a longitudinal mode in addition to the two transverse m…