The prototypical major cluster merger Abell 754 - I. Calibration of MeerKAT data and radio/X-ray spectral mapping of the cluster

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Volume 690 (October 2024)

A&A, 690 (2024) A222

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Table 1

Properties of A754 derived from the literature.

z	0.0543
Right ascension (h, m, s)	09 09 08
Declination (^o, ′, ″)	−09 39 58
M₅₀₀ (10¹⁴ M_⊙)	${6.85}_{- 0.13}^{+ 0.12}$ $6.85_{ - 0.13}^{ + 0.12}$
Y₅₀₀ (10⁻³ arcmin²)	40.2 ± 2.7
r₅₀₀ (kpc)	1322 ± 8
L_X (10⁴⁴ erg s⁻¹)	5.56 ± 0.15
K₀ (keV cm² )	270 ± 70
kT_vir (keV)	11.1 ± 0.4
$σ_{v}^{turb}$ $\sigma _{\rm{v}}^{{\rm{turb }}}$ (km s⁻¹)	676 ± 46
$σ_{v}^{gal}$ $\sigma _{\rm{v}}^{{\rm{gal }}}$ (km s⁻¹)	953 ± 40

Notes. Reported quantities are redshift (z; Smith et al. 2004); equatorial coordinates; mass and integrated Comptonization parameter within the radius inside which the mean mass density is 500 times the critical density at the cluster redshift (M₅₀₀, Y₅₀₀, and r₅₀₀; Planck Collaboration XXVII 2016); X-ray luminosity in the 0.1–2.4 keV band (L_X; Chen et al. 2007); central entropy (K₀ ; Cavagnolo et al. 2009); virial temperature (kT_vir; Hudson et al. 2010); ICM turbulent velocity dispersion ( $σ_{v}^{turb}$ $\sigma _{\rm{v}}^{{\rm{turb }}}$ ; Eckert et al. 2017); and galaxy velocity dispersion ( $σ_{v}^{gal}$ $\sigma _{\rm{v}}^{{\rm{gal }}}$ ; Christlein & Zabludoff 2003).

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