The XMM cluster survey: exploring scaling relations and completeness of the dark energy survey year 3 redMaPPer cluster catalogue

Upsdell, EW ORCID: 0000-0003-0628-7201, Giles, PA ORCID: 0000-0003-4937-8453, Romer, AK, Wilkinson, R, Turner, DJ ORCID: 0000-0001-9658-1396, Hilton, M, Rykoff, E, Farahi, A, Bhargava, S, Jeltema, T ORCID: 0000-0001-6089-0365, Klein, M, Bermeo, A, Collins, CA, Ebrahimpour, L, Hollowood, D, Mann, RG, Manolopoulou, M, Miller, CJ, Rooney, PJ, Sahlén, M et al (2023) The XMM cluster survey: exploring scaling relations and completeness of the dark energy survey year 3 redMaPPer cluster catalogue. Monthly Notices of the Royal Astronomical Society, 522 (4). pp. 5267-5290. ISSN 0035-8711

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Abstract

We cross-match and compare characteristics of galaxy clusters identified in observations from two sky surveys using two completely different techniques. One sample is optically selected from the analysis of 3 years of Dark Energy Survey observations using the redMaPPer cluster detection algorithm. The second is X-ray selected from XMM observations analysed by the XMM Cluster Survey. The samples comprise a total area of 57.4 deg2, bounded by the area of four contiguous XMM survey regions that overlap the DES footprint. We find that the X-ray-selected sample is fully matched with entries in the redMaPPer catalogue, above λ > 20 and within 0.1 <z <0.9. Conversely, only 38 per cent of the redMaPPer catalogue is matched to an X-ray extended source. Next, using 120 optically clusters and 184 X-ray-selected clusters, we investigate the form of the X-ray luminosity-temperature (LX -TX ), luminosity-richness (LX -λ), and temperature-richness (TX -λ) scaling relations. We find that the fitted forms of the LX -TX relations are consistent between the two selection methods and also with other studies in the literature. However, we find tentative evidence for a steepening of the slope of the relation for low richness systems in the X-ray-selected sample. When considering the scaling of richness with X-ray properties, we again find consistency in the relations (i.e. LX -λ and TX -λ) between the optical and X-ray-selected samples. This is contrary to previous similar works that find a significant increase in the scatter of the luminosity scaling relation for X-ray-selected samples compared to optically selected samples.

Item Type:	Article
Additional Information:	This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2023 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press
Date of acceptance:	20 April 2023
Date of first compliant Open Access:	12 September 2023
Date Deposited:	12 Sep 2023 13:05
Last Modified:	04 Jul 2025 16:45
DOI or ID number:	10.1093/mnras/stad1220
URI:	https://researchonline.ljmu.ac.uk/id/eprint/21423

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