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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.
(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.
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