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EnglishWe 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.
| Titolo: | Mass calibration of the CODEX cluster sample using SPIDERS spectroscopy – II. The X-ray luminosity–mass relation | |
| Autori: | ||
| Data di pubblicazione: | 2020 | |
| Stato di pubblicazione: | Pubblicato | |
| Rivista: | ||
| 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. | |
| Handle: | http://hdl.handle.net/11368/2963115 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1093/mnras/staa888 | |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |