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∝AXMBX200cE(z)2(1+z)γX , we find best-fitting parameters AX=0.62+0.05−0.06(±0.06)×1044ergs−1 , BX=2.35+0.21−0.18(±0.09) , γX=−2.77+1.06−1.05(±0.79) , where we include systematic uncertainties in parentheses and for a pivot mass and redshift of 3×1014M⊙ 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.

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

Biviano, A;Saro, A;
2020-01-01

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∝AXMBX200cE(z)2(1+z)γX , we find best-fitting parameters AX=0.62+0.05−0.06(±0.06)×1044ergs−1 , BX=2.35+0.21−0.18(±0.09) , γX=−2.77+1.06−1.05(±0.79) , where we include systematic uncertainties in parentheses and for a pivot mass and redshift of 3×1014M⊙ 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
Pubblicato
https://academic.oup.com/mnras/article/494/2/2736/5819966#202803703
File in questo prodotto:
File Dimensione Formato  
CODEX_Lx_Capasso.pdf

accesso aperto

Descrizione: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Tipologia: Documento in Versione Editoriale
Licenza: Digital Rights Management non definito
Dimensione 1.99 MB
Formato Adobe PDF
1.99 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2963115
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 8
social impact