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arXiv · 1705.06852

Multiwavelength study of X-ray Luminous Clusters in the Hyper Suprime-Cam Subaru Strategic Program S16A field

Keita Miyaoka·Nobuhiro Okabe·Takao Kitaguchi·Masamune Oguri·Yasushi Fukazawa·Rachel Mandelbaum·Elinor Medezinski·Yasunori Babazaki·Atsushi J. Nishizawa·Takashi Hamana·Yen-Ting Lin·Hiroki Akamatsu·I-Non Chiu·Yutaka Fujita·Yuto Ichinohe·Yutaka Komiyama·Toru Sasaki·Motokazu Takizawa·Shutaro Ueda·Keiichi Umetsu·Jean Coupon·Chiaki Hikage·Akio Hoshino·Alexie Leauthaud·Kyoko Matsushita·Ikuyuki Mitsuishi·Hironao Miyatake·Satoshi Miyazaki·Surhud More·Kazuhiro Nakazawa·Naomi Ota·Kousuke Sato·David Spergel·Takayuki Tamura·Masayuki Tanaka·Manobu M. Tanaka·Yousuke Utsumi
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Abstract

We present a joint X-ray, optical and weak-lensing analysis for X-ray luminous galaxy clusters selected from the MCXC (Meta-Catalog of X-Ray Detected Clusters of Galaxies) cluster catalog in the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) survey field with S16A data, As a pilot study of our planned series papers, we measure hydrostatic equilibrium (H.E.) masses using XMM-Newton data for four clusters in the current coverage area out of a sample of 22 MCXC clusters. We additionally analyze a non-MCXC cluster associated with one MCXC cluster. We show that H.E. masses for the MCXC clusters are correlated with cluster richness from the CAMIRA catalog (Oguri et al. 2017), while that for the non-MCXC cluster deviates from the scaling relation. The mass normalization of the relationship between the cluster richness and H.E. mass is compatible with one inferred by matching CAMIRA cluster abundance with a theoretical halo mass function. The mean gas mass fraction based on H.E. masses for the MCXC clusters is $\langle f_{\rm gas} \rangle = 0.125\pm0.012$ at spherical overdensity $Δ=500$, which is $\sim80-90$ percent of the cosmic mean baryon fraction, $Ω_b/Ω_m$, measured by cosmic microwave background experiments. We find that the mean baryon fraction estimated from X-ray and HSC-SSP optical data is comparable to $Ω_b/Ω_m$. A weak-lensing shear catalog of background galaxies, combined with photometric redshifts, is currently available only for three clusters in our sample. Hydrostatic equilibrium masses roughly agree with weak-lensing masses, albeit with large uncertainty. This study demonstrates that further multiwavelength study for a large sample of clusters using X-ray, HSC-SSP optical and weak lensing data will enable us to understand cluster physics and utilize cluster-based cosmology.

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Keita Miyaoka, Nobuhiro Okabe, Takao Kitaguchi, Masamune Oguri, Yasushi Fukazawa, Rachel Mandelbaum, Elinor Medezinski, Yasunori Babazaki, Atsushi J. Nishizawa, Takashi Hamana, Yen-Ting Lin, Hiroki Akamatsu, I-Non Chiu, Yutaka Fujita, Yuto Ichinohe, Yutaka Komiyama, Toru Sasaki, Motokazu Takizawa, Shutaro Ueda, Keiichi Umetsu, Jean Coupon, Chiaki Hikage, Akio Hoshino, Alexie Leauthaud, Kyoko Matsushita, Ikuyuki Mitsuishi, Hironao Miyatake, Satoshi Miyazaki, Surhud More, Kazuhiro Nakazawa, Naomi Ota, Kousuke Sato, David Spergel, Takayuki Tamura, Masayuki Tanaka, Manobu M. Tanaka, Yousuke Utsumi. 2017-10-18. Multiwavelength study of X-ray Luminous Clusters in the Hyper Suprime-Cam Subaru Strategic Program S16A field. https://doi.org/10.1093/pasj%2Fpsx132

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