An accurate theoretical template of the redshift-space galaxy power spectrum, if applicable out to nonlinear scales, enables us to extract more stringent and robust constraints on cosmological parameters from the measured galaxy clustering. In thi...
Monthly Notices of the Royal Astronomical Society 496(4) 4468-4487 2020年8月
An optical cluster finder inevitably suffers from projection effects, where it misidentifies a superposition of galaxies in multiple haloes along the line of sight as a single cluster. Using mock cluster catalogues built from cosmological N-body s...
Murata, Ryoma   Sunayama, Tomomi   Oguri, Masamune   More, Surhud   Nishizawa, Atsushi J.   Nishimichi, Takahiro   Osato, Ken   
Publications of the Astronomical Society of Japan 72(4) 2020年8月
Recent constraints on the splashback radius around optically selected galaxy clusters from the redMaPPer cluster-finding algorithm in the literature have shown that the observed splashback radius is smaller than that predicted by N-bo...
Coulton, William R.   Liu, Jia   McCarthy, Ian G.   Osato, Ken   
Monthly Notices of the Royal Astronomical Society 2020年7月
We present a novel statistic to extract cosmological information in weak lensing data: the lensing minima. We also investigate the effect of baryons on cosmological constraints from peak and minimum counts. Using the MassiveNuS simulations, we fin...
We provide a new fitting formula of the matter bispectrum in the nonlinear regime calibrated by high-resolution cosmological N-body simulations of 41 cold dark matter (wCDM, w = constant) models around the Planck 2015 best-fit parameters. As the p...