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 • 5 Oct 2020 • Sunao Sugiyama, Volodymyr Takhistov, Edoardo Vitagliano, Alexander Kusenko, Misao Sasaki, Masahiro Takada
Primordial black holes (PBHs) can constitute the predominant fraction of dark matter (DM) if PBHs reside in the currently unconstrained "sublunar" mass range.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Physics - Phenomenology
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
no code implementations • 17 Jul 2020 • Shogo Masaki, Takahiro Nishimichi, Masahiro Takada
To generate initial conditions for cosmological $N$-body simulations, one needs to prepare a uniform distribution of simulation particles, so-called the pre-initial condition (pre-IC).
Cosmology and Nongalactic Astrophysics
1 code implementation • 18 Mar 2020 • Takahiro Nishimichi, Guido D'Amico, Mikhail M. Ivanov, Leonardo Senatore, Marko Simonović, Masahiro Takada, Matias Zaldarriaga, Pierre Zhang
An accurate theoretical template for the galaxy power spectrum is a key for the success of ongoing and future spectroscopic surveys.
Cosmology and Nongalactic Astrophysics
2 code implementations • 12 Jun 2014 • Emmanuel Schaan, Masahiro Takada, David N. Spergel
This approach enables an approximate derivation of a joint likelihood for the cluster number counts, the weak lensing power spectrum and the bispectrum.
Cosmology and Nongalactic Astrophysics
no code implementations • 6 Dec 2004 • Dragan Huterer, Masahiro Takada
We estimate the accuracy with which the matter power spectrum will need to be calibrated in order not to contribute appreciably to the error budget for future weak lensing surveys.