Skip to main content


Author(s): Miyazaki, Satoshi; Oguri, Masamune; Hamana, Takashi; Tanaka, Masayuki; Miller, Lance; et al

To refer to this page use:
Abstract: We present properties of moderately massive clusters of galaxies detected by the newly developed Hyper Suprime-Cam on the Subaru telescope using weak gravitational lensing. Eight peaks exceeding a signal-to-noise ratio (S/N) of 4.5 are identified on the convergence S/N map of a 2.3 deg(2) field observed during the early commissioning phase of the camera. Multi-color photometric data are used to generate optically selected clusters using the Cluster finding algorithm based on the Multiband Identification of Red-sequence galaxies algorithm. The optical cluster positions were correlated with the peak positions from the convergence map. All eight significant peaks have optical counterparts. The velocity dispersion of clusters is evaluated by adopting the Singular Isothemal Sphere fit to the tangential shear profiles, yielding virial mass estimates, M-500c, of the clusters which range from 2.7 x 10(13) to 4.4 x 10(-14) M-circle dot. The number of peaks is considerably larger than the average number expected from Lambda CDM cosmology but this is not extremely unlikely if one takes the large sample variance in the small field into account. We could, however, safely argue that the peak count strongly favors the recent Planck result suggesting a high sigma(8) value of 0.83. The ratio of stellar mass to the dark matter halo mass shows a clear decline as the halo mass increases. If the gas mass fraction, f(g), in halos is universal, as has been suggested in the literature, the observed baryon mass in stars and gas shows a possible deficit compared with the total baryon density estimated from the baryon oscillation peaks in anisotropy of the cosmic microwave background.
Publication Date: 1-Jul-2015
Citation: Miyazaki, Satoshi, Oguri, Masamune, Hamana, Takashi, Tanaka, Masayuki, Miller, Lance, Utsumi, Yousuke, Komiyama, Yutaka, Furusawa, Hisanori, Sakurai, Junya, Kawanomoto, Satoshi, Nakata, Fumiaki, Uraguchi, Fumihiro, Koike, Michitaro, Tomono, Daigo, Lupton, Robert, Gunn, James E, Karoji, Hiroshi, Aihara, Hiroaki, Murayama, Hitoshi, Takada, Masahiro. (2015). PROPERTIES OF WEAK LENSING CLUSTERS DETECTED ON HYPER SUPRIME-CAM’s 2.3 deg(2) FIELD. ASTROPHYSICAL JOURNAL, 807 (10.1088/0004-637X/807/1/22
DOI: doi:10.1088/0004-637X/807/1/22
ISSN: 0004-637X
EISSN: 1538-4357
Related Item:
Type of Material: Journal Article
Journal/Proceeding Title: ASTROPHYSICAL JOURNAL
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.