Planck/SDSS cluster mass and gas scaling relations for a volume-complete redMaPPer sample. Issue 1 (21st April 2018)

• Record Type: Journal Article
• Authors: Jimeno, Pablo; Diego, Jose M; Broadhurst, Tom; De Martino, I; Lazkoz, Ruth
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 478:Issue 1(2018)
• Page Start: 638
• Page End: 650
• Publication Date: 2018-04-21
• Subjects: galaxies: clusters: general -- galaxies: clusters: intracluster medium -- cosmology: observations -- dark matter; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty987
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: Using Planck satellite data, we construct Sunyaev–Zel'dovich (SZ) gas pressure profiles for a large, volume-complete sample of optically selected clusters. We have defined a sample of over 8000 redMaPPer clusters from the Sloan Digital Sky Survey, within the volume-complete redshift region 0.100 < z < 0.325, for which we construct SZ effect maps by stacking Planck data over the full range of richness. Dividing the sample into richness bins we simultaneously solve for the mean cluster mass in each bin together with the corresponding radial pressure profile parameters, employing an Monte Carlo Markov Chain analysis. These profiles are well detected over a much wider range of cluster mass and radius than previous work, showing a clear trend towards larger break radius with increasing cluster mass. Our SZ-based masses fall ∼16 per cent below the mass–richness relations from weak lensing, in a similar fashion as the 'hydrostatic bias' related with X-ray derived masses. Finally, we derive a tight Y 500 – M 500 relation over a wide range of cluster mass, with a power-law slope equal to 1.70 ± 0.07, which agrees well with the independent slope obtained by the Planck team with an SZ-selected cluster sample, but extends to lower masses with higher precision.