Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Sugiyama, Naonori S."'
Autor:
Sugiyama, Naonori S., Yamauchi, Daisuke, Kobayashi, Tsutomu, Fujita, Tomohiro, Arai, Shun, Hirano, Shin'ichi, Saito, Shun, Beutler, Florian, Seo, Hee-Jong
We present, for the first time, an observational test of the consistency relation for the large-scale structure (LSS) of the Universe through a joint analysis of the anisotropic two- and three-point correlation functions (2PCF and 3PCF) of galaxies.
Externí odkaz:
http://arxiv.org/abs/2305.01142
Publikováno v:
J. Open Source Softw. 8(91), 2023, 5571
Triumvirate is a Python/C++ package for measuring the three-point clustering statistics in large-scale structure (LSS) cosmological analyses. Given a catalogue of discrete particles (such as galaxies) with their spatial coordinates, it computes estim
Externí odkaz:
http://arxiv.org/abs/2304.03643
Autor:
Sugiyama, Naonori S., Yamauchi, Daisuke, Kobayashi, Tsutomu, Fujita, Tomohiro, Arai, Shun, Hirano, Shin'ichi, Saito, Shun, Beutler, Florian, Seo, Hee-Jong
We report a new test of modified gravity theories using the large-scale structure of the Universe. This paper is the first attempt to (1) apply a joint analysis of the anisotropic components of galaxy two- and three-point correlation functions (2 and
Externí odkaz:
http://arxiv.org/abs/2302.06808
We investigate the galaxy bispectrum induced by the nonlinear gravitational evolution as a possible probe to constrain degenerate higher-order scalar tensor (DHOST) theories. We find that the signal obtained from the leading kernel of second-order de
Externí odkaz:
http://arxiv.org/abs/2108.02382
We establish a practical method for the joint analysis of anisotropic galaxy two- and three-point correlation functions (2PCF and 3PCF) on the basis of the decomposition formalism of the 3PCF using tri-polar spherical harmonics. We perform such an an
Externí odkaz:
http://arxiv.org/abs/2010.06179
Publikováno v:
Phys. Rev. D 103, 023506 (2021)
Galaxy bispectrum is a promising probe of inflationary physics in the early universe as a measure of primordial non-Gaussianity (PNG), whereas its signal-to-noise ratio is significantly affected by the mode coupling due to non-linear gravitational gr
Externí odkaz:
http://arxiv.org/abs/2010.04567
Publikováno v:
MNRAS Letters 498, 1, L77-L81 (2020)
We study an efficient way to enhance the measurability of the galaxy density and/or velocity power spectrum in redshift space. It is based on the angular decomposition with the Tripolar spherical harmonic (TripoSH) basis and applicable even to galaxy
Externí odkaz:
http://arxiv.org/abs/2005.03438
In this paper, we predict the covariance matrices of both the power spectrum and the bispectrum, including full non-Gaussian contributions, redshift space distortions, linear bias effects and shot-noise corrections, using perturbation theory (PT). To
Externí odkaz:
http://arxiv.org/abs/1908.06234
Publikováno v:
Phys. Rev. D 100, 103515 (2019)
The super-sample tidal effect carries information on long-wavelength fluctuations that we cannot measure directly. It arises from the mode-coupling between short-wavelength and long-wavelength perturbations beyond a finite region of a galaxy survey a
Externí odkaz:
http://arxiv.org/abs/1907.10591
To fully extract cosmological information from nonlinear galaxy distribution in redshift space, it is essential to include higher-order statistics beyond the two-point correlation function. In this paper, we propose a new decomposition formalism for
Externí odkaz:
http://arxiv.org/abs/1803.02132