The warm-hot intergalactic medium in inter-cluster filaments - A forecast for HUBS observations based on eRASS1 superclusters

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Volume 695 (March 2025)

A&A, 695 (2025) A15

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Table 4.

Best-fit results for the HUBS mock spectra under the nominal case using the vapec model. The mock exposure time is 200 ks and the “full length” extraction region is used.

Filament Name	kT^(a)	O ^(a)	Ne ^(a)	Mg ^(a)	Fe ^(a)	norm^(a)	f_SNIaerror^(b)
	(keV)	(solar)	(solar)	(solar)	(solar)	(10⁻⁵ cm⁻⁵)
J0935+1949	$0 . 51_{- 0.01}^{+ 0.01}$ $0.51_{-0.01}^{+0.01}$	$0 . 22_{- 0.01}^{+ 0.06}$ $0.22_{-0.01}^{+0.06}$	$0 . 18_{- 0.02}^{+ 0.05}$ $0.18_{-0.02}^{+0.05}$	$0 . 24_{- 0.01}^{+ 0.07}$ $0.24_{-0.01}^{+0.07}$	$0 . 21_{- 0.01}^{+ 0.04}$ $0.21_{-0.01}^{+0.04}$	$37 . 3_{- 5.8}^{+ 1.5}$ $37.3_{-5.8}^{+1.5}$ (39.3)	±25.9%
J0945+3418	$0 . 50_{- 0.01}^{+ 0.00}$ $0.50_{-0.01}^{+0.00}$	$0 . 19_{- 0.01}^{+ 0.04}$ $0.19_{-0.01}^{+0.04}$	$0 . 17_{- 0.01}^{+ 0.05}$ $0.17_{-0.01}^{+0.05}$	$0 . 17_{- 0.03}^{+ 0.03}$ $0.17_{-0.03}^{+0.03}$	$0 . 19_{- 0.00}^{+ 0.04}$ $0.19_{-0.00}^{+0.04}$	$32 . 4_{- 5.3}^{+ 0.0}$ $32.4_{-5.3}^{+0.0}$ (30.9)	±28.3%
J1214+2712	$0 . 48_{- 0.01}^{+ 0.01}$ $0.48_{-0.01}^{+0.01}$	$0 . 19_{- 0.01}^{+ 0.03}$ $0.19_{-0.01}^{+0.03}$	$0 . 21_{- 0.02}^{+ 0.03}$ $0.21_{-0.02}^{+0.03}$	$0 . 20_{- 0.03}^{+ 0.01}$ $0.20_{-0.03}^{+0.01}$	$0 . 21_{- 0.02}^{+ 0.02}$ $0.21_{-0.02}^{+0.02}$	$47 . 7_{- 4.2}^{+ 4.2}$ $47.7_{-4.2}^{+4.2}$ (49.1)	±16.9%
J2300−4534	$0 . 49_{- 0.01}^{+ 0.01}$ $0.49_{-0.01}^{+0.01}$	$0 . 19_{- 0.02}^{+ 0.03}$ $0.19_{-0.02}^{+0.03}$	$0 . 23_{- 0.02}^{+ 0.04}$ $0.23_{-0.02}^{+0.04}$	$0 . 17_{- 0.02}^{+ 0.04}$ $0.17_{-0.02}^{+0.04}$	$0 . 22_{- 0.02}^{+ 0.03}$ $0.22_{-0.02}^{+0.03}$	$29 . 6_{- 3.8}^{+ 2.4}$ $29.6_{-3.8}^{+2.4}$ (31.7)	±24.6%

Notes.

^(a)

Parameters kT, O, Ne, Mg, Fe and norm given in best-fit value with 68% confidence range, followed by the model value used for spectral simulation in parenthesis.

^(b)

f_SNIaerror is the 1σ error in SNIa fraction obtained from abunfit tool using relative abundance ratios of O, Ne, Mg with respect to Fe.

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