NIKA2 observations of 3 low-mass galaxy clusters at z ∼ 1: pressure profile and Y_{\rm SZ}-M relation

2023/10/10 by R. Adam, Adam, R., M. Ricci +130
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena

paper · pdf · doi:10.48550/arxiv.2310.06373

openalex publication_date 2023/10/10 · openalex created_date 2023/10/12 · openalex updated_date 2026/07/28

Abstract

Three galaxy clusters selected from the XXL X-ray survey at high redshift and low mass (z∼1 and M₅₀₀ ∼ 1-2 × 10¹⁴ M_\odot) were observed with NIKA2 to image their Sunyaev-Zel'dovich effect (SZ) signal. They all present an SZ morphology, together with the comparison with X-ray and optical data, that indicates dynamical activity related to merging events. Despite their disturbed intracluster medium, their high redshifts, and their low masses, the three clusters follow remarkably well the pressure profile and the SZ flux-mass relation expected from standard evolution. This suggests that the physics that drives cluster formation is already in place at z ∼ 1 down to M₅₀₀ ∼ 10¹⁴ M_\odot.

Citations

• Sunyaev-Zel'dovich effect and X-ray scaling relations of galaxies, groups and clusters in the IllustrisTNG simulations

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