Ultra-low-frequency LOFAR spectral indices of cluster radio halos

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Volume 689 (September 2024)

A&A, 689 (2024) A218

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Table 1.

Flux density and spectral indeces of our sample of radio halos

Cluster name	$S_{1 r_{e}}^{54 MHz}$ $S_{1r_{\mathrm{e}}}^{54 \rm MHz}$	$S_{3 σ}^{54 MHz}$ $S_{3\sigma}^{54 \rm MHz}$	$S_{1 r_{e}}^{144 MHz}$ $S_{1r_{\mathrm{e}}}^{144 \rm MHz}$	$S_{3 σ}^{144 MHz}$ $S_{3\sigma}^{144 \rm MHz}$	α_{1r_e}	α_3σ	Image
	[mJy]	[mJy]	[mJy]	[mJy]
PSZ2G086.93+53.18	6 ± 3	25 ± 7	0.7 ± 0.2	3.1 ± 0.5	−2.20 ± 0.61	−2.15 ± 0.32	T90 (=150 kpc)
PSZ2G096.83+52.49	122 ± 21	288 ± 43	20.8 ± 2.2	43.8 ± 4.5	−1.80 ± 0.30	−1.92 ± 0.17	T100 kpc
PSZ2G099.86+58.45	34 ± 5	22 ± 4	6.5 ± 0.8	4.3 ± 0.6	−1.67 ± 0.26	−1.66 ± 0.27	T50 kpc
PSZ2G107.10+65.32N	205 ± 14	1084 ± 69	65.5 ± 6.6	314.8 ± 31.5	−1.16 ± 0.24	−1.26 ± 0.04	T100 kpc
PSZ2G107.10+65.32S	78 ± 15	248 ± 33	24.8 ± 2.9	83.7 ± 8.9	−1.17 ± 0.46	−1.11 ± 0.26	T50 kpc
PSZ2G111.75+70.37	37 ± 7	205 ± 26	5.1 ± 0.6	27 ± 3.0	−2.02 ± 0.27	−2.07 ± 0.14	T100 kpc
PSZ2G114.31+64.89	149 ± 12	324 ± 23	23.9 ± 2.4	43.2 ± 4.4	−1.87 ± 0.16	−2.05 ± 0.05	T50 kpc
PSZ2G133.60+69.04	318 ± 33	590 ± 54	62.7 ± 6.3	115.8 ± 12.1	−1.66 ± 0.20	−1.66 ± 0.11	T50 kpc
PSZ2G135.17+65.43	36 ± 8	50 ± 10	10.7 ± 1.2	16.6 ± 1.8	−1.24 ± 0.47	−1.12 ± 0.39	T50 kpc
PSZ2G139.18+56.37	303 ± 20	1249 ± 82	96.5 ± 9.7	292.3 ± 29.3	−1.17 ± 0.24	−1.48 ± 0.04	T50 kpc
PSZ2G143.26+65.24	33 ± 6	115 ± 14	7.3 ± 1.0	28.3 ± 3.0	−1.54 ± 0.35	−1.43 ± 0.19	T100 kpc

Notes. The table lists, from first to last column: cluster name, 54 MHz halo flux density estimated within 1 e-folding radius and within 3σ 144 MHz contours, 144 MHz halo flux density estimated within 1 e-folding radius and within 3σ 144 MHz contours, spectral index estimated within 1 e-folding radius and within 3σ 144 MHz contours, source-subtracted image used for flux density measurement (T50 kpc = taper 50 kpc, T100 kpc = taper 100 kpc, T90 = taper 90″).

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