7 papers
Constraining Primordial Power Asymmetry from Galaxy Clustering and Peculiar Velocity Information
Keita Minato, Atsushi Taruya, Teppei Okumura +1
Primordial power asymmetry would probe departures from statistical isotropy, offering a clue to the physics of the primordial Universe. We investigate how such asymmetries can be t…
Galaxy sizes as complementary (zero-)bias tracers of local primordial non-Gaussianity
Nhat-Minh Nguyen, Kazuyuki Akitsu, Atsushi Taruya
The scale-dependent bias in halo and galaxy power spectra is a key signature of local primordial non-Gaussianity (local PNG), with PNG sensitivity scaling as -- the rati…
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…
Probing dipolar power asymmetry with galaxy clustering and intrinsic alignments
Keita Minato, Atsushi Taruya, Teppei Okumura +1
We investigate the prospects for probing large-scale statistical anisotropy through galaxy clustering and intrinsic alignments (IA) in Stage IV galaxy surveys. Specifically, we con…
Squeezing Full-Shape Dynamical Dark Energy Constraints with Galaxy Alignments
Junsup Shim, Teppei Okumura, Atsushi Taruya
Recent deviations from the Cosmological Constant suggest that dark energy (DE) may be dynamical, based on baryon acoustic oscillations and full-shape galaxy clustering…
SHAPE: cosmology with cluster halo intrinsic alignments from subhalo distributions
Shogo Ishikawa, Atsushi Taruya, Takahiro Nishimichi +2
Galaxy clusters trace the most massive dark matter haloes, whose shapes and orientations reflect the imprint of the cosmic large-scale tidal field. This paper introduces the Subhal…