6.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Academia SinicaTW1.4k papers
- National Astronomical Observatory of JapanJP910 papers
- The University of TokyoJP744 papers
- Center for Astrophysics Harvard & SmithsonianUS671 papers
- Centre National de la Recherche ScientifiqueFR668 papers
- European Southern ObservatoryCL490 papers
- California Institute of TechnologyUS470 papers
- The Graduate University for Advanced Studies, SOKENDAIJP427 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP425 papers
- Jet Propulsion LaboratoryUS360 papers
- Max Planck Institute for AstronomyDE342 papers
- Leiden UniversityNL340 papers
26 papers · 1 filter
Observational features of reflection asymmetric black holes
Che-Yu Chen, Hung-Yi Pu
The Kerr spacetime is symmetric with respect to a well-defined equatorial plane. When testing the equatorial reflection symmetry of an isolated black hole, one is at the same time…
Correlations for an anisotropic polarized stochastic gravitational wave background in pulsar timing arrays
Reginald Christian Bernardo, Guo-Chin Liu, Kin-Wang Ng
The recent compelling observation of the nanohertz stochastic gravitational wave background has brought to light a new galactic arena to test gravity. In this paper, we derive a fo…
Beyond the Hellings-Downs curve: Non-Einsteinian gravitational waves in pulsar timing array correlations
Reginald Christian Bernardo, Kin-Wang Ng
The recent astronomical milestone by the pulsar timing arrays (PTA) has revealed galactic-size gravitational waves (GW) in the form of a stochastic gravitational wave background (S…
Testing gravity with cosmic variance-limited pulsar timing array correlations
Reginald Christian Bernardo, Kin-Wang Ng
The nanohertz stochastic gravitational wave background (SGWB) is an excellent early universe laboratory for testing the fundamental properties of gravity. In this letter, we elucid…
Hunting the stochastic gravitational wave background in pulsar timing array cross correlations through theoretical uncertainty
Reginald Christian Bernardo, Kin-Wang Ng
Incredible progress on the theoretical uncertainty of the spatial correlations of the stochastic gravitational wave (GW) background were recently made. However, it remains to reali…
Constraining gravitational wave propagation using pulsar timing array correlations
Reginald Christian Bernardo, Kin-Wang Ng
Pulsar timing arrays (PTA) are a promising probe to the cosmologically novel nanohertz gravitational wave (GW) regime through the stochastic GW background. In this work, we conside…
Overlap reduction functions for a polarized stochastic gravitational-wave background in the Einstein Telescope-Cosmic Explorer and the LISA-Taiji networks
Guo-Chin Liu, Kin-Wang Ng
The detection of gravitational waves from the coalescences of binary compact stars by current interferometry experiments has opened up a new era of gravitational-wave astrophysics…
Pulsar and cosmic variances of pulsar timing-array correlation measurements of the stochastic gravitational wave background
Reginald Christian Bernardo, Kin-Wang Ng
Pulsar timing-array correlation measurements offer an exciting opportunity to test the nature of gravity in the cosmologically novel nanohertz gravitational wave regime. The stocha…
Stochastic gravitational wave background phenomenology in a pulsar timing array
Reginald Christian Bernardo, Kin-Wang Ng
Pulsar timing offers an independent avenue to test general relativity and alternative gravity theories. This requires an understanding of how metric polarizations beyond the famili…
Testing non-local gravity by clusters of galaxies
Filippo Bouchè, Salvatore Capozziello, Vincenzo Salzano +1
Extended theories of gravity have been extensively investigated during the last thirty years, aiming at fixing infrared and ultraviolet shortcomings of General Relativity and of th…
Black Hole Shadow with Soft Hair
Feng-Li Lin, Avani Patel, Hung-Yi Pu
Light bending by the strong gravity around the black hole will form the so-called black hole shadow, the shape of which can shed light on the structure of the near-horizon geometry…
Timing-residual power spectrum of a polarized stochastic gravitational-wave background in pulsar-timing-array observation
Guo-Chin Liu, Kin-Wang Ng
We study the observation of stochastic gravitational-wave background (SGWB) made by pulsar-timing arrays in the spherical harmonic space. Instead of using the Shapiro time delay, w…
Observation of polarized stochastic gravitational-wave background in pulsar-timing-array experiments
Yu-Kuang Chu, Guo-Chin Liu, Kin-Wang Ng
We study the observation of polarized stochastic gravitational-wave background (SGWB) in pulsar-timing-array experiments. The time residual for an observed pulsar is formulated as…
Constraints on black-hole charges with the 2017 EHT observations of M87*
Prashant Kocherlakota, Luciano Rezzolla, Heino Falcke +234
Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M8…
Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
Dimitrios Psaltis, Lia Medeiros, Pierre Christian +185
The 2017 Event Horizon Telescope (EHT) observations of the central source in M87 have led to the first measurement of the size of a black-hole shadow. This observation offers a new…
Spherical harmonic analysis of anisotropies in polarized stochastic gravitational wave background with interferometry experiments
Yu-Kuang Chu, Guo-Chin Liu, Kin-Wang Ng
We study the interferometric observation of intensity and polarization anisotropies of a stochastic gravitational wave background (SGWB). We show that the observed correlated data…
Electromagnetic coupling effects in natural inflation
Hing-Tong Cho, Kin-Wang Ng
In this work we study the effects of the electromagnetic coupling in natural inflation in a systematic manner using the Schwinger-Keldysh formalism. The corresponding influence fun…
Quantum loop effects to the power spectrum of primordial perturbations during ultra slow-roll inflation
Wei-Can Syu, Da-Shin Lee, Kin-Wang Ng
We examine the quantum loop effects on the single-field inflationary models in a spatially flat Friedmann-Robertson-Walker (FRW) cosmological space-time with a general self-interac…
Observational and Experimental Gravity
Angela D. V. Di Virgilio, Wei-Tou Ni, Sperello di Serego Alighieri +2
We indicate the progress of experimental gravity, present an outlook in this field, and summarise the Observational/Experimental Parallel Session together with a related plenary ta…
Apparent versus true value of the cosmological constant
Antonio Enea Romano, Pisin chen
Supernovae observations strongly support the presence of a cosmological constant, but its value, which we will call apparent, is normally determined assuming that the universe can…
Quasi-equilibrium Binary Black Hole Initial Data for Dynamical Evolutions
Hwei-Jang Yo, James N. Cook, Stuart L. Shapiro +1
We present a formalism for constructing quasi-equilibrium binary black hole initial data suitable for numerical evolution. We construct quasi-equilibrium models by imposing an appr…
Relativistic Hydrodynamic Evolutions with Black Hole Excision
Matthew D. Duez, Stuart L. Shapiro, Hwei-Jang Yo
We present a numerical code designed to study astrophysical phenomena involving dynamical spacetimes containing black holes in the presence of relativistic hydrodynamic matter. We…
Improved numerical stability of stationary black hole evolution calculations
Hwei-Jang Yo, Thomas W. Baumgarte, Stuart L. Shapiro
We experiment with modifications of the BSSN form of the Einstein field equations (a reformulation of the ADM equations) and demonstrate how these modifications affect the stabilit…
Hamiltonian Analysis of Poincaré Gauge Theory: Higher Spin Modes
H. J. Yo, J. M. Nester
We examine several higher spin modes of the Poincaré gauge theory (PGT) of gravity using the Hamiltonian analysis. The appearance of certain undesirable effects due to non-linear c…