期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 450, 期 4, 页码 3649-3664出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv809
关键词
gravitational lensing: weak; methods: statistical; galaxies: clusters: general; galaxies: clusters: intracluster medium; galaxies: kinematics and dynamics
资金
- contract ASI/INAF [n.I/023/12/0, I/009/10/0]
- contract PRIN MIUR
- contract PRIN INAF
We discuss the scaling relation between mass and integrated Compton parameter of a sample of galaxy clusters from the all-sky Planck Sunyaev-Zel'dovich catalogue. Masses were measured with either weak lensing, caustics techniques, or assuming hydrostatic equilibrium. The retrieved Y-500-M-500 relation does not strongly depend on the calibration sample. We found a slope of 1.4-1.9, in agreement with self-similar predictions, with an intrinsic scatter of 20 +/- 10 per cent. The absolute calibration of the relation cannot be ascertained due to systematic differences of similar to 20-40 per cent in mass estimates reported by distinct groups. Due to the scatter, the slope of the conditional scaling relation, to be used in cosmological studies of number counts, is shallower, similar to 1.1-1.6. The regression methods employed account for intrinsic scatter in the mass measurements too. We found that Planck mass estimates suffer from a mass-dependent bias.
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