The XMM Cluster Survey: automating the estimation of hydrostatic mass for large samples of galaxy clusters - I. Methodology, validation, and application to the SDSSRM-XCS sample

• Type: Article in International Scientific Journal
• Date: 2025

Authors

Turner, DJ (Author) Other; Giles, PA (Author) Other; Romer, AK (Author) Other; Pilling, J (Author) Other; Lingard, TK (Author) Other; Wilkinson, R (Author) Other; Hilton, M (Author) Other; Upsdell, EW (Author) Other; Al-Serkal, R (Author) Other; Cheng, T (Author) Other; Eappen, R (Author) Other; Rooney, PJ (Author) Other; Bhargava, S (Author) Other; Collins, CA (Author) Other; Mayers, J (Author) Other; Miller, C (Author) Other; Nichol, RC (Author) Other; Sahlén, M (Author) Other; viana, ptp (Author) FCUP

Journal

Title: Monthly Notices of the Royal Astronomical Society

Vol. 537

Pages: 1404-1429

ISSN: 0035-8711

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 0 Citations

Scopus

Other information

Authenticus ID: P-018-4BS

DOI: 10.1093/mnras/staf007

Abstract (EN): We describe features of the X-ray: Generate and Analyse (XGA) open-source software package that have been developed to facilitate automated hydrostatic mass(Mhydro) measurementsfrom XMM X-ray observations of clusters of galaxies. Thisincludes describing how XGA measures global, and radial, X-ray properties of galaxy clusters. We then demonstrate the reliability of XGA by comparing simple X-ray properties, namely the X-ray temperature and gas mass, with published values presented by the XMM Cluster Survey (XCS), the Ultimate XMM eXtragaLactic survey project (XXL), and the Local Cluster Substructure Survey (LoCuSS). XGA measured values for temperature are, on average, within 1 per cent of the values reported in the literature for each sample. XGA gas masses for XXL clusters are shown to be similar to 10 per cent lower than previous measurements (though the difference is only significant at the similar to 1.8 sigma level), LoCuSS R2500 and R500 gas mass re-measurements are 3 per cent and 7 per cent lower, respectively (representing 1.5 sigma and 3.5 sigma differences). Like-for-like comparisons of hydrostatic mass are made to LoCuSS results, which show that our measurements are 10 +/- 3 per cent (19 +/- 7 per cent) higher for R2500 (R500). The comparison between R500 masses shows significant scatter. Finally, we present new Mhydro measurements for 104 clusters from the Sloan Digital Sky Survey (SDSS) DR8 redMaPPer XCS sample (SDSSRM-XCS). Our SDSSRM-XCS hydrostatic mass measurements are in good agreement with multiple literature estimates, and represent one of the largest samples of consistently measured hydrostatic masses. We have demonstrated that XGA is a powerful tool for X-ray analysis of clusters; it will render complex-to-measure X-ray properties accessible to non-specialists.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 26