XXL Survey groups and clusters in the Hyper Suprime-Cam Survey: Scaling relations between X-ray properties and weak lensing mass

Mauro Sereno, Keiichi Umetsu, Stefano Ettori, Dominique Eckert, Fabio Gastaldello, Paul Giles, Maggie Lieu, Ben Maughan, Nobuhiro Okabe, Mark Birkinshaw, I-Non Chiu, Yutaka Fujita, Satoshi Miyazaki, David Rapetti, Elias Koulouridis, Marguerite Pierre

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Abstract

Scaling relations trace the formation and evolution of galaxy clusters. We exploited multi-wavelength surveys – the XXL survey at XMM-Newton in the X-ray band, and the Hyper Suprime-Cam Subaru Strategic Program for optical weak lensing – to study an X-ray selected, complete sample of clusters and groups. The scalings of gas mass, temperature, and soft-band X-ray luminosity with the weak lensing mass show imprints of radiative cooling and active galactic nucleus feedback in groups. From the multi-variate analysis, we found some evidence for steeper than self-similar slopes for gas mass (⁠βmg|m=1.73±0.80⁠) and luminosity (βl|m = 1.91 ± 0.94) and a nearly self-similar slope for the temperature (βt|m = 0.78 ± 0.43). Intrinsic scatters of X-ray properties appear to be positively correlated at a fixed mass (median correlation factor ρX1X2|m∼0.34⁠) due to dynamical state and merger history of the haloes. Positive correlations with the weak lensing mass (median correlation factor ρmwlX|m∼0.35⁠) can be connected to triaxiality and orientation. Comparison of weak lensing and hydrostatic masses suggests a small role played by non-thermal pressure support (⁠9±17 per cent⁠).
Original languageEnglish
Article numberstz3425
Pages (from-to)4528-4545
Number of pages18
JournalAstronomy and Astrophysics
Volume492
Issue number3
DOIs
Publication statusAccepted/In press - 25 Nov 2019

Keywords

  • gravitational lensing
  • weak, galaxies
  • clusters
  • general, galaxies
  • intracluster medium

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