English
Related papers

Related papers: LoCuSS: Subaru Weak Lensing Study of 30 Galaxy Clu…

200 papers

We develop a novel method of measuring the lensing distortion profiles of clusters with stacking the scaled amplitudes of background galaxy ellipticities as a function of the scaled centric radius according to the NFW prediction of each…

Cosmology and Nongalactic Astrophysics · Physics 2015-10-21 Hiroko Niikura , Masahiro Takada , Nobuhiro Okabe , Rossella Martino , Ryuichi Takahashi

We present a stacked weak-lensing analysis of an approximately mass-selected sample of 50 galaxy clusters at 0.15<z<0.3, based on observations with Suprime-Cam on the Subaru Telescope. We develop a new method for selecting lensed background…

Cosmology and Nongalactic Astrophysics · Physics 2019-08-19 Nobuhiro Okabe , Graham P. Smith , Keiichi Umetsu , Masahiro Takada , Toshifumi Futamase

We directly construct model-independent mass profiles of galaxy clusters from combined weak-lensing distortion and magnification measurements within a Bayesian statistical framework,which allows for a full parameter-space extraction of the…

Cosmology and Nongalactic Astrophysics · Physics 2012-06-26 Keiichi Umetsu , Tom Broadhurst , Adi Zitrin , Elinor Medezinski , Li-Yen Hsu

We present weak-lensing mass measurements of 50 X-ray luminous galaxy clusters at $0.15\le z\le0.3$, based on uniform high quality observations with Suprime-Cam mounted on the 8.2-m Subaru telescope. We pay close attention to possible…

Cosmology and Nongalactic Astrophysics · Physics 2016-08-03 Nobuhiro Okabe , Graham P. Smith

We study the mass distribution of a sample of 28 galaxy clusters using strong and weak lensing observations. The clusters are selected via their strong lensing properties as part of the Sloan Giant Arcs Survey (SGAS) from the Sloan Digital…

We present a 4 deg^2 weak gravitational lensing survey of subhalos in the very nearby Coma cluster using the Subaru/Suprime-Cam. The large apparent size of cluster subhalos allows us to measure the mass of 32 subhalos detected in a…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Nobuhiro Okabe , Toshifumi Futamase , Masaru Kajisawa , Risa Kuroshima

We present a Subaru weak lensing measurement of ACT-CL J0022.2-0036, one of the most luminous, high-redshift (z=0.81) Sunyaev-Zel'dovich (SZ) clusters discovered in the 268 deg^2 equatorial region survey of the Atacama Cosmology Telescope.…

We obtain the projected mass distributions for two Subaru/Suprime-Cam fields in the southwest region (r\simlt 60') of the Coma cluster (z=0.0236) by weak lensing analysis and detect eight subclump candidates. We quantify the contribution of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Nobuhiro Okabe , Yuki Okura , Toshifumi Futamase

We present the first results of a MOS campaign to follow up cluster candidates located via weak lensing. Our main goals are to search for spatial concentrations of galaxies that are plausible optical counterparts of the weak lensing…

We performed individual weak-lensing (WL) mass measurements for 78 eROSITA's first All-Sky Survey (eRASS1) clusters in the footprint of Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) S19A. We did not adopt priors on the eRASS1 X-ray…

We present the first scaling relation between weak-lensing galaxy cluster mass, $M_{WL}$, and near-infrared luminosity, $L_K$. Our results are based on 17 clusters observed with wide-field instruments on Subaru, the United Kingdom Infrared…

We present results of weak lensing cluster counts obtained from 11 sq.deg SuprimeCam data. Although the area is much smaller than previous work dealing with weak lensing peak statistics, the number density of galaxies usable for weak…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Takashi Hamana , Junya Sakurai , Michitaro Koike , Lance Miller

(Abridged) We quantify the bias and scatter in galaxy cluster masses and concentrations derived from an idealised mock weak gravitational lensing (WL) survey, and their effect on the cluster mass-concentration relation. For this, we…

Cosmology and Nongalactic Astrophysics · Physics 2012-05-14 Yannick M. Bahé , Ian G. McCarthy , Lindsay J. King

We present the first weak-lensing-based scaling relation between galaxy cluster mass, M_wl, and integrated Compton parameter Y_sph. Observations of 18 galaxy clusters at z~0.2 were obtained with the Subaru 8.2-m telescope and the…

We investigate whether the shapes of galaxy clusters inferred from weak gravitational lensing can be used as a test of the nature of dark matter. We analyse mock weak lensing data, with gravitational lenses extracted from cosmological…

Cosmology and Nongalactic Astrophysics · Physics 2023-03-29 Andrew Robertson , Eric Huff , Katarina Markovic

This is the first in a series of papers in which we measure accurate weak-lensing masses for 51 of the most X-ray luminous galaxy clusters known at redshifts 0.15<z<0.7, in order to calibrate X-ray and other mass proxies for cosmological…

[Abridged] We derive a projected 2D mass map of the well studied galaxy cluster A1689 based on an entropy-regularized maximum-likelihood combination of the lens magnification and distortion of red background galaxies registered in deep…

Astrophysics · Physics 2009-06-23 Keiichi Umetsu , Tom Broadhurst

While our current cosmological model places galaxy clusters at the nodes of a filament network (the cosmic web), we still struggle to detect these filaments at high redshifts. We perform a weak lensing study for a sample of 16 massive,…

We study the radial total mass profiles of nine massive galaxy clusters ($M_\mathrm{200c}>5\times10^{14}$ M$_\odot$) in the redshift range $0.2 < z < 0.9$. These clusters were observed as part of the CLASH, HFF, BUFFALO, and CLASH-VLT…

Cosmology and Nongalactic Astrophysics · Physics 2025-06-25 Enrico Maraboli , Claudio Grillo , Pietro Bergamini , Carlo Giocoli

We present a joint weak-lensing/X-ray study of galaxy cluster mass-observable scaling relations, motivated by the critical importance of accurate calibration of mass proxies for future X-ray missions, including eROSITA. We use a sample of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Nobuhiro Okabe , Yu-Ying Zhang , Alexis Finoguenov , Masahiro Takada , Graham P. Smith , Keiichi Umetsu , Toshifumi Futamase
‹ Prev 1 2 3 10 Next ›