no code implementations • 14 Jan 2022 • Benjamin Remy, Francois Lanusse, Niall Jeffrey, Jia Liu, Jean-Luc Starck, Ken Osato, Tim Schrabback
We introduce a novel methodology allowing for efficient sampling of the high-dimensional Bayesian posterior of the weak lensing mass-mapping problem, and relying on simulations for defining a fully non-Gaussian prior.
no code implementations • 22 Dec 2020 • Teppei Okumura, Masao Hayashi, I-Non Chiu, Yen-Ting Lin, Ken Osato, Bau-Ching Hsieh, Sheng-Chieh Lin
From the constrained HOD model, the average mass of halos hosting the [OII] emitters is derived to be $\log{M_{eff}/(h^{-1}M_\odot)}=12. 70^{+0. 09}_{-0. 07}$ and $12. 61^{+0. 09}_{-0. 05}$ at z=1. 19 and 1. 47, respectively, which will become halos with the present-day mass, $M\sim 1. 5 \times 10^{13}h^{-1}M_\odot$.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
1 code implementation • 19 Oct 2020 • Ken Osato, Jia Liu, Zoltán Haiman
The $\kappa$TNG suite includes 10, 000 realisations of $5 \times 5 \, \mathrm{deg}^2$ maps for 40 source redshifts up to $z_s = 2. 6$, well covering the range of interest for existing and upcoming weak lensing surveys.
Cosmology and Nongalactic Astrophysics
no code implementations • 8 Oct 2020 • Ken Osato, Masahiro Takada
First, we study the impact of super sample covariance (SSC) on the tSZ power spectrum measurements, and find that the sample variance is dominated by the connected non-Gaussian (cNG) covariance arising mainly from Poisson number fluctuations of massive clusters in the survey volume.
Cosmology and Nongalactic Astrophysics
no code implementations • 1 Sep 2020 • Jingjing Shi, Toshiki Kurita, Masahiro Takada, Ken Osato, Yosuke Kobayashi, Takahiro Nishimichi
The shape of massive disk- and spheroid-galaxies tend to align with the tidal field.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
1 code implementation • 23 Oct 2018 • Ken Osato, Takahiro Nishimichi, Francis Bernardeau, Atsushi Taruya
We study the accuracy with which cosmological parameters can be determined from real space power spectrum of matter density contrast at weakly nonlinear scales using analytical approaches.
Cosmology and Nongalactic Astrophysics
2 code implementations • 5 Jun 2017 • Ryuichi Takahashi, Takashi Hamana, Masato Shirasaki, Toshiya Namikawa, Takahiro Nishimichi, Ken Osato, Kosei Shiroyama
The data sets include full-sky convergence and shear maps from redshifts $z=0. 05$ to $5. 3$ at intervals of $150 \, h^{-1}{\rm Mpc}$ comoving radial distance (corresponding to a redshift interval of $\Delta z \simeq 0. 05$ at the nearby universe), enabling the construction of a mock shear catalog for an arbitrary source distribution up to $z=5. 3$.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology