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Table 2.

Flux density measurements and best-fit synchrotron model parameters of the AGN-related sources in Abell 2256.

Source S144 MHz S46 MHz S23 MHz Model αinj(a) Break frequency (a) Remnant fraction (a) Age (b)
[Jy] [Jy] [Jy] [MHz] [Myr]
AG+AH 0.13 ± 0.01 0.47 ± 0.05 0.64 ± 0.08 KGJP −0.55 ± 0.02 113 ± 12 0.57 ± 0.05 197 ± 10
AI 0.04 ± 0.01 0.15 ± 0.02 0.38 ± 0.06 KGJP −0.91 ± 0.02 242 ± 82 0.33 ± 0.04 135 ± 30
F1 0.05 ± 0.01 0.26 ± 0.03 0.64 ± 0.07 CI (c) −0.86 ± 0.02 < 23 > 437
F2 0.69 ± 0.07 1.96 ± 0.20 2.62 ± 0.26 KGJP −0.53 ± 0.01 129 ± 22 0.24 ± 0.05 185 ± 15
F3 0.36 ± 0.04 1.06 ± 0.11 1.97 ± 0.20 KGJP −0.66 ± 0.02 145 ± 24 0.25 ± 0.05 174 ± 14
F4 0.06 ± 0.01 0.56 ± 0.06 1.91 ± 0.19 CI (c) −1.4 ± 0.1 < 23 > 437

Notes.

(a)

The error bars only reflect the statistical uncertainties from the fit.

(b)

For the age estimate, a conservative magnetic field value of 7 μG was assumed, following Brentjens (2008). For a lower magnetic field strength, the age would increase.

(c)

F1 and F4 are consistent with a simple power-law spectrum without a break frequency observed.

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