Journal
ASTROPHYSICAL JOURNAL
Volume 754, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0004-637X/754/2/119
Keywords
cosmology: observations; galaxies: clusters: intracluster medium; gravitational lensing: weak
Categories
Funding
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- James S. McDonnell Foundation
- Associates of the California Institute of Technology
- University of Chicago
- states of California, Illinois, and Maryland
- National Science Foundation [AST-0838187, PHY-0114422, PHY-0551164]
- NASA [HST-HF-51259.01, PF0-110077]
- Royal Society
- Tohoku University
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
- German BMBF through the Verbundforschung [50 OR 1005]
- [0740099]
- [18072001]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1140019, 0838187] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1125897] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [23340061] Funding Source: KAKEN
- STFC [ST/J003077/1, ST/H001417/1, PP/E003486/1] Funding Source: UKRI
Ask authors/readers for more resources
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 similar or equal to 0.2 were obtained with the Subaru 8.2 m telescope and the Sunyaev-Zel'dovich Array. The M-WL-Y-sph scaling relations, measured at Delta = 500, 1000, and 2500 rho(c), are consistent in slope and normalization with previous results derived under the assumption of hydrostatic equilibrium (HSE). We find an intrinsic scatter in M-WL at fixed Y-sph of 20%, larger than both previous measurements of M-HSE-Y-sph scatter as well as the scatter in true mass at fixed Y-sph found in simulations. Moreover, the scatter in our lensing-based scaling relations is morphology dependent, with 30%-40% larger M-WL for undisturbed compared to disturbed clusters at the same Y-sph at r(500). Further examination suggests that the segregation may be explained by the inability of our spherical lens models to faithfully describe the three-dimensional structure of the clusters, in particular, the structure along the line of sight. We find that the ellipticity of the brightest cluster galaxy, a proxy for halo orientation, correlates well with the offset in mass from the mean scaling relation, which supports this picture. This provides empirical evidence that line-of-sight projection effects are an important systematic uncertainty in lensing-based scaling relations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available