Diffuse steep-spectrum sources from the 74 MHz VLSS survey

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Volume 527 (March 2011)

A&A, 527 (2011) A114

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Table 4

Source list and properties.

Source/cluster	z	S₃₂₅	S₁₄₂₅	α_74−1400	Curvature	LLS	Classification^h
		Jy	mJy		α₇₄₋₆₁₀ − α_610−1425	kpc


VLSS J1431.8+1331	0.1599	0.373 ± 0.040	14.6 ± 1.1	−2.03 ± 0.05	1.03^f	125	AGN + AGNR or PHNX
VLSS J1133.7+2324	0.61 ± 0.16^g	0.273 ± 0.028	12.3 ± 1.1	−1.69 ± 0.06	0.96	570^g	AGNR or DSAR
Abell 2048	0.0972	0.559 ± 0.061	18.9 ± 4.3	−1.50 ± 0.05	1.6	310	PHNX
24P73	0.15 ± 0.1^b^g	0.307 ± 0.033	12.0 ± 3.0	−2.20 ± 0.06	2.0	270	PHNX
VLSS J0004.9−457	0.3 ± 0.1^e	0.417 ± 0.046	32.2 ± 1.9	−1.40 ± 0.04	0.30^f	200	AGN (or MH + DSAR?)
VLSS J0915.7+2511	0.324	0.417 ± 0.046	24.7 ± 1.5^a	−1.52 ± 0.04	1.02	190	AGNR or PHNX
VLSS J1117.1+7003	0.8 ± 0.4^d	0.030 ± 0.006^c	2.9 ± 0.5^a	−1.87 ± 0.07	0.0	130	AGN?
VLSS J2043.9−1118	0.5 ± 0.3^d	...	7.7 ± 0.6^a	−1.74 ± 0.05	0.84	250	AGN (MH? + DSAR?)
VLSS J0516.2+0103	1.2 ± 0.7^d	...	4.3 ± 0.4^a	−1.73 ± 0.06	0.0	290	AGN (or MH?)
VLSS J2209.5+1546	1.1 ± 0.7^d	...	7.0 ± 0.9^a	−1.56 ± 0.07	0.59	500	AGN?
VLSS J2241.3−1626	0.5 ± 0.3^d	...	14.6 ± 1.1^a	−1.44 ± 0.06	0.0	290	AGN?

Notes.

^(a)

flux from NVSS (Condon et al. 1998);

^(b)

identification of the cD galaxy uncertain;

^(c)

flux from WENSS (Rengelink et al. 1997);

^(d)

redshift estimated using the fitted Hubble-R relation from de Vries et al. (2007), since it is unclear whether there is a common underlying population of massive elliptical galaxies for extended steep-spectrum radio sources we have taken the 3C Hubble-R relation from Snellen et al. (1996) as an upper limit for the redshift (i.e., the 3C galaxies are about 1 mag brighter at the same redshift);

^(e)

redshift estimated using the fitted Hubble-K relation from Willott et al. (2003);

^(f)

varies across the source;

^(g)

association with cluster uncertain;

^(h)

PHNX = radio phoenix, AGNR = AGN relic, MH = radio mini-halo, DSAR = relic tracing shock wave with DSA.

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