Kavli Affiliate: Hitoshi Murayama
| First 5 Authors: Sunao Sugiyama, Hironao Miyatake, Surhud More, Xiangchong Li, Masato Shirasaki
| Summary:
We present cosmological parameter constraints from a blind joint analysis of
three two-point correlation functions measured from the Year 3 Hyper
Suprime-Cam (HSC-Y3) imaging data, covering 416 deg$^2$, and the SDSS DR11
spectroscopic galaxies spanning the redshift range $[0.15, 0.70]$. We subdivide
the SDSS galaxies into three volume-limited samples separated in redshift, each
of which acts as a large-scale structure tracer characterized by the
measurement of the projected correlation function, $w_{rm p}(R)$. We also use
the measurements of the galaxy-galaxy weak lensing signal $Delta Sigma(R)$
for each of these SDSS samples which act as lenses for a secure sample of
source galaxies selected from the HSC-Y3 shape catalog based on their
photometric redshifts. We combine these measurements with the cosmic shear
correlation functions, $xi_{pm}(vartheta)$, measured for our HSC source
sample. We model these observables with the minimal bias model of the galaxy
clustering observables in the context of a flat $Lambda$CDM cosmology. We use
conservative scale cuts, $R>12$ and $8~h^{-1}$Mpc, for $DeltaSigma$ and
$w_{rm p}$, respectively, where the minimal bias model is valid, in addition
to conservative prior on the residual bias in the mean redshift of the HSC
photometric source galaxies. Our baseline analysis yields
$S_8=0.775^{+0.043}_{-0.038}$ (68% C.I.) for the $Lambda$CDM model, after
marginalizing over uncertainties in other parameters. Our value of $S_8$ is
consistent with that from the Planck 2018 data, but the credible interval of
our result is still relatively large. Our results are statistically consistent
with those of a companion paper, which extends this analysis to smaller scales
with an emulator-based halo model.
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