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
17 papers · 2 filters
Testing local position invariance with odd multipoles of galaxy clustering statistics
Takuya Inoue, Teppei Okumura, Shohei Saga +1
We investigate cosmological constraints on local position invariance (LPI), a key aspect of the Einstein equivalence principle (EEP), through asymmetric galaxy clustering. The LPI…
Improving cosmological constraints via galaxy intrinsic alignment in full-shape analysis
Junsup Shim, Teppei Okumura, Atsushi Taruya
The intrinsic alignment (IA) of galaxy shapes probes the underlying gravitational tidal field, thus offering cosmological information complementary to galaxy clustering. In this pa…
Miscentering of Optical Galaxy Clusters Based on Sunyaev-Zeldovich Counterparts
Jupiter Ding, Roohi Dalal, Tomomi Sunayama +7
The "miscentering effect," i.e., the offset between a galaxy cluster's optically-defined center and the center of its gravitational potential, is a significant systematic effect on…
Cosmography from accurate mass modeling of the lens group SDSS J0100+1818: five sources at three different redshifts
A. Bolamperti, C. Grillo, G. B. Caminha +6
Systems where multiple sources at different redshifts are strongly lensed by the same deflector allow one to directly investigate the evolution of the angular diameter distances wi…
CHEX-MATE: the intracluster medium entropy distribution in the gravity-dominated regime
G. Riva, G. W. Pratt, M. Rossetti +26
We characterise the entropy profiles of 32 very high mass () galaxy clusters (HIGHMz), selected from the CHEX-MATE sample, to study the intracl…
Constraining cosmology with N-body simulations for future spectroscopic galaxy surveys at
Sy-Yun Pu, Teppei Okumura, Chian-Chou Chen +2
Determining the spatial curvature () independent of cosmic microwave background observations plays a key role in revealing the physics of the early universe. The Hubble tensio…
Charting the Nanohertz Gravitational Wave Sky with Pulsar Timing Arrays
Reginald Christian Bernardo, Kin-Wang Ng
In the summer of 2023, the pulsar timing arrays (PTAs) announced a compelling evidence for the existence of a nanohertz stochastic gravitational wave background (SGWB). Despite thi…
Accurate pulsar timing array residual variances and correlation of the stochastic gravitational wave background
Reginald Christian Bernardo, Kin-Wang Ng
Pulsar timing arrays have reported a compelling evidence of a nanohertz stochastic gravitational wave background. However, the origin of the signal remains undetermined, largely be…
TDCOSMO. XVI. Measurement of the Hubble Constant from the Lensed Quasar WGD20384008
Kenneth C. Wong, Frédéric Dux, Anowar J. Shajib +17
Time-delay cosmography is a powerful technique to constrain cosmological parameters, particularly the Hubble constant (). The TDCOSMO collaboration is performing an ongoing…
Toward a test of Gaussianity of a gravitational wave background
Reginald Christian Bernardo, Stephen Appleby, Kin-Wang Ng
The degree of Gaussianity of a field offers insights into its cosmological nature, and its statistical properties serve as indicators of its Gaussianity. In this work, we examine t…
Information content in anisotropic cosmological fields: Impact of different multipole expansion scheme for galaxy density and ellipticity correlations
Takuya Inoue, Teppei Okumura, Shohei Saga +1
Multipole expansions have been often used for extracting cosmological information from anisotropic quantities in observation. However, which basis of the expansion is best suited t…
Weak-Lensing Shear-Selected Galaxy Clusters from the Hyper Suprime-Cam Subaru Strategic Program: II. Cosmological Constraints from the Cluster Abundance
I-Non Chiu, Kai-Feng Chen, Masamune Oguri +9
We present cosmological constraints using the abundance of weak-lensing shear-selected galaxy clusters in the Hyper Suprime-Cam (HSC) Subaru Strategic Program. The clusters are sel…
Probing vector chirality in the early Universe
Junsup Shim, Ue-Li Pen, Hao-Ran Yu +1
We explore the potential of using late-time galaxy spins to test the parity symmetry of primordial vector fossils. Using -body simulations, we analyze halo spins as a reliable p…
Extracting parity-violating gravitational waves from projected tidal force tensor in three dimensions
Teppei Okumura, Misao Sasaki
Gravitational waves (GWs) may be produced by various mechanisms in the early universe. In particular, if parity is violated, it may lead to the production of parity-violating GWs.…
Lensed Type Ia Supernova "Encore" at z=2: The First Instance of Two Multiply-Imaged Supernovae in the Same Host Galaxy
J. D. R. Pierel, A. B. Newman, S. Dhawan +60
A bright (=24 mag), supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply-imaged as a result o…
JWST Photometric Time-Delay and Magnification Measurements for the Triply-Imaged Type Ia "Supernova H0pe" at z = 1.78
J. D. R. Pierel, B. L. Frye, M. Pascale +60
Supernova (SN) H0pe is a gravitationally lensed, triply-imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster of galaxies. Wel…
Cosmography with Supernova Refsdal through time-delay cluster lensing: independent measurements of the Hubble constant and geometry of the Universe
C. Grillo, L. Pagano, P. Rosati +1
We present new measurements of the values of the Hubble constant, matter density, dark energy density, and dark energy density equation-of-state parameters from a full strong lensi…