MeerKAT discovery of gigahertz radio emission extending from Abell 3017 towards Abell 3016

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Volume 694 (February 2025)

A&A, 694 (2025) A320

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Table 4.

Flux densities of diffuse radio structures at MeerKAT different frequencies.

	Full-band		Two subbands

	S_1280 MHz	L_1280 MHz	S_1101 MHz	S_1490 MHz	$α_{1101 MHz}^{1490 MHz}$ $\alpha_{1101\,\mathrm{MHz}}^{1490\,\mathrm{MHz}}$	α_fit
	(mJy)	(10²³ W Hz⁻¹)	(mJy)	(mJy)
Bridge ^(a)	4.27 ± 0.49	6.09	5.01 ± 0.57	2.62 ± 0.31	−2.14 ± 0.54	−2.13 ± 0.52

Extended radio emission in A3017 ^(a)	24.00 ± 1.35	34.23	27.77 ± 1.56	17.38 ± 0.98	−1.55 ± 0.26	−1.55 ± 0.26

Mini-halo ^(b)	17.09 ± 0.90	24.38	20.47 ± 1.09	12.66 ± 0.68	−1.59 ± 0.25	−1.59 ± 0.25

N-extension ^(b)	2.69 ± 0.18	3.84	2.75 ± 0.19	2.11 ± 0.14	−0.88 ± 0.32	−0.88 ± 0.31

N-ridge ^(b)	1.34 ± 0.10	1.91	1.46 ± 0.11	1.07 ± 0.09	−1.03 ± 0.37	−1.01 ± 0.36

A3016 mini-halo ^(a)	0.26 ± 0.04	0.37	0.31 ± 0.05	0.14 ± 0.02	−2.63 ± 0.71	−2.67 ± 0.67

Notes.

^(a)

The measurements of flux density were derived from the compact-source-subtracted, low-resolution image. The residual of the tadpole-like radio structure was subtracted when measuring the radio bridge.

^(b)

The measurements of flux density were derived from the compact-source-subtracted, high-resolution MeerKAT image.

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