Detection of pure warm-hot intergalactic medium emission from a 7.2 Mpc long filament in the Shapley supercluster using X-ray spectroscopy

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Volume 698 (June 2025)

A&A, 698 (2025) A270

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Table 2.

X-ray properties of the four galaxy clusters in the system.

Cluster property	A3532	A3530	A3528-S	A3528-N
(1) RA	194.340°	193.904°	193.671°	193.594°
(2) Dec	−30.362°	−30.344°	−29.230°	−29.014°
(3) z	0.055	0.054	0.054	0.054
(4) L_X	8.77±0.41	3.81±0.23	7.59±0.36	6.51±0.33
(5) T_X,CE	$4 . 54_{- 0.26}^{+ 0.39}$ $4.54^{+0.39}_{-0.26}$	$3 . 27_{- 0.16}^{+ 0.17}$ $3.27^{+0.17}_{-0.16}$	$3 . 86_{- 0.17}^{+ 0.17}$ $3.86^{+0.17}_{-0.17}$	$4 . 19_{- 0.47}^{+ 0.49}$ $4.19^{+0.49}_{-0.47}$
(6) Z_X,CE	$0 . 41_{- 0.05}^{+ 0.06}$ $0.41^{+0.06}_{-0.05}$	$0 . 57_{- 0.09}^{+ 0.08}$ $0.57^{+0.08}_{-0.09}$	$0 . 43_{- 0.07}^{+ 0.07}$ $0.43^{+0.07}_{-0.07}$	$0 . 32_{- 0.08}^{+ 0.07}$ $0.32^{+0.07}_{-0.08}$
(7) M_gas	2.11±0.05	1.37±0.06	2.00±0.04	1.91±0.07
(8) Y_X,CE	$9 . 58_{- 0.59}^{+ 0.85}$ $9.58^{+0.85}_{-0.59}$	$4 . 48_{- 0.28}^{+ 0.30}$ $4.48^{+0.30}_{-0.28}$	$7 . 72_{- 0.37}^{+ 0.37}$ $7.72^{+0.37}_{-0.37}$	$8 . 00_{- 0.94}^{+ 0.98}$ $8.00^{+0.98}_{-0.94}$
(9) M₅₀₀	2.49±0.12	1.65±0.08	2.26±0.10	2.32±0.11
(10) M₂₀₀	3.62±0.18	2.40±0.12	3.29±0.16	3.38±0.17
(11) R₅₀₀	14.34′/920 kpc	12.78′/820 kpc	14.17′/909 kpc	14.27′/915 kpc
(12) R₂₀₀	22.05′/1415 kpc	19.65′/1259 kpc	21.79′/1398 kpc	21.95′/1407 kpc

Notes. (1) Right Ascension J2000. (2) Declination J2000. (3) Optical spectroscopic redshift. (4) X-ray luminosity in the 0.5−2 keV band measured within <R₅₀₀ in 10⁴⁴ erg s⁻¹ units. (5) Core-excised ICM temperature measured within (0.15−1)×R₅₀₀ in keV units. (6) Same as (5) but for the metallicity Z_CE in solar metallicity units. (7) Gas mass measured within <R₅₀₀ in (10¹³ M_⊙) units. (8) X-ray equivalent of the Compton−y parameter in 10¹³ M_⊙ keV units. (9) Total mass estimated within <R₅₀₀ in 10¹⁴ M_⊙ units using the Y_X,CE−M₅₀₀ relation of L15. (10) Total mass within <R₂₀₀ in 10¹⁴ M_⊙ units using the R₂₀₀ = 1.538 R₅₀₀ relation of Reiprich et al. (2013) and the determined R₅₀₀ value. (11) R₅₀₀ radius. (12) R₂₀₀ radius.

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