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

Upsdell, EW, Giles, PA, Romer, AK, Wilkinson, R, Turner, DJ, Hilton, M, Rykoff, E, Farahi, A, Bhargava, S, Jeltema, T, 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

Preview

Text The XMM cluster survey exploring scaling relations and completeness of the dark energy survey year 3 redMaPPer cluster catalogue.pdf - Published Version Available under License Creative Commons Attribution. Download (5MB) | Preview

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:	12 Sep 2023 13:05
DOI or ID number:	10.1093/mnras/stad1220
URI:	https://ljmu-9.eprints-hosting.org/id/eprint/21423

View Item