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Mass calibration of the CODEX cluster sample using SPIDERS spectroscopy - II. The X-ray luminosity-mass relation

Capasso, R, Mohr, JJ, Saro, A, Biviano, A, Clerc, N, Finoguenov, A, Klein, M, Grandis, S, Collins, CA, Damsted, S, Kirkpatrick, C and Kukkola, A (2020) Mass calibration of the CODEX cluster sample using SPIDERS spectroscopy - II. The X-ray luminosity-mass relation. Monthly Notices of the Royal Astronomical Society, 494 (2). pp. 2736-2746. ISSN 0035-8711

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Abstract

We perform the calibration of the X-ray luminosity.mass scaling relation on a sample of 344 CODEX clusters with z < 0.66 using the dynamics of their member galaxies. Spectroscopic follow-up measurements have been obtained from the SPIDERS survey, leading to a sample of 6658 red member galaxies. We use the Jeans equation to calculate halo masses, assuming an NFW mass profile and analysing a broad range of anisotropy profiles. With a scaling relation of the form LX α AXMBX200c E(z)2(1 + z)γX, we find best-fitting parameters AX = 0.62+0.05-0.06(±0.06) × 1044 erg s-1, BX = 2.35+0.21-0.18(±0.09), γX = -2.77+1.06-1.05(±0.79), wherewe include systematic uncertainties in parentheses and for a pivot mass and redshift of 3 × 1014 M⊙ and 0.16, respectively. We compare our constraints with previous results, and we combine our sample with the SPT SZE-selected cluster subsample observed with XMM-Newton extending the validity of our results to a wider range of redshifts and cluster masses. © 2020 The Author(s).

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2020 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical and Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Date Deposited: 16 Mar 2021 12:25
Last Modified: 16 Mar 2021 12:30
DOI or Identification number: 10.1093/MNRAS/STAA888
URI: https://researchonline.ljmu.ac.uk/id/eprint/14627

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