Table 2
Estimated parameters of the detected radio-emitting sources in the (circum-)nuclear regions of IC 883.
Source | Epoch | Δαs(J2000) | Δδ′′(J2000) | Pν | Sν | Lν | ΘM × Θm | log TB |
name | label | ( mJy/beam) | (mJy) | (1027 erg s-1 Hz-1) | (mas2) | (K) | ||
|
||||||||
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
|
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A | EM | 35.319 (<1) | 22.35 (1) | 4.89 ± 0.25 | 6.07 ± 0.31 | 72.65 ± 3.67 | 104.8 × 30.4 | 4.15 ± 0.02 |
B1a | EM | 35.332 (1) | 22.15 (3) | 1.04 ± 0.07 | 2.07 ± 0.11 | 24.75 ± 1.34 | 138.1 × 97.1 | 3.45 ± 0.02 |
B1b | EM | 35.304 (1) | 22.63 (6) | 0.59 ± 0.05 | 1.75 ± 0.10 | 20.97 ± 1.17 | 191.3 × 141.6 | 3.09 ± 0.02 |
B2a | EM | 35.356 (1) | 21.74 (3) | 1.03 ± 0.07 | 2.54 ± 0.13 | 30.34 ± 1.61 | 224.0 × 90.5 | 3.11 ± 0.02 |
B2b | EM | 35.281 (2) | 23.05 (11) | 0.31 ± 0.05 | 0.97 ± 0.07 | 11.55 ± 0.78 | 295.9 × 109.8 | 2.45 ± 0.03 |
|
||||||||
A1 | V1 | 31.3180 (~0.0) | 22.352 (0.1) | 1.68 ± 0.12 | 1.94 ± 0.13 | 23.19 ± 1.54 | 1.2 × 0.6 | 7.81 ± 0.03 |
V2 | 31.3179 (0.1) | 22.352 (~0.0) | 1.53 ± 0.14 | 1.53 ± 0.14 | 18.33 ± 1.69 | 0.6 × ··· | 6.79 ± 0.04 | |
V3 | 35.3181 (0.1) | 22.349 (0.1) | 1.95 ± 0.15 | 2.65 ± 0.17 | 31.73 ± 2.04 | 1.8 × 0.3 | 7.59 ± 0.03 | |
V4 | 35.3180 (0.6) | 22.351 (~0.0) | 1.12 ± 0.17 | 1.21 ± 0.17 | 14.49 ± 2.07 | 13.0 × ··· | 5.97 ± 0.06 | |
V5 | 35.3179 (0.1) | 22.352 (~0.0) | 3.82 ± 0.20 | 3.82 ± 0.20 | 45.67 ± 2.42 | 0.8 × ··· | 6.35 ± 0.02 | |
V6 | 35.3178 (~0.0) | 22.351 (0.1) | 2.85 ± 0.22 | 4.38 ± 0.28 | 52.34 ± 3.34 | 1.5 × 0.4 | 7.55 ± 0.03 | |
|
||||||||
A2 | V5 | 35.3190 (0.7) | 22.317 (0.2) | 0.42 ± 0.07 | 0.56 ± 0.07 | 6.66 ± 0.86 | 7.0 × 2.0 | 5.75 ± 0.06 |
|
||||||||
A3 | V6 | 35.3176 (~0.0) | 22.354 (0.2) | 0.97 ± 0.18 | 1.55 ± 0.19 | 18.54 ± 2.28 | 1.4 × 1.1 | 7.15 ± 0.05 |
|
||||||||
A4 | V4 | 35.3181 (0.7) | 22.371 (0.1) | 0.89 ± 0.17 | 1.27 ± 0.17 | 15.25 ± 2.08 | 8.1 × 0.6 | 5.98 ± 0.06 |
V5 | 35.3187 (0.9) | 22.366 (0.2) | 0.33 ± 0.07 | 0.67 ± 0.07 | 8.06 ± 0.89 | 14.0 × 1.4 | 5.23 ± 0.05 |
Notes. Columns: (1) Source names corresponding to those in Figs. 1 and 2. (2) Epoch label corresponding to those specified in Table 1. Note that epoch EM and V5 are quasi-simultaneous. (3–4) Coordinates given with respect to α(J2000) = 13h20m000 and
. Position uncertainties in mas, within parentheses, are given in terms of the full width at half maximum (FWHM) by FWHM/(2 × S/N), where S/N is the signal-to-noise ratio, and FWHM was taken as the projection of the beam major axis on both α and δ axes. (5) Peak intensity. We estimated the uncertainties by adding in quadrature the rms noise in the map (Col. 10 in Table 1) to a 5% uncertainty in the point-source flux density calibration. (6) Flux density. (7) Monochromatic luminosity at the observed frequency (Col. 5 in Table 1). (8) Deconvolved major and minor axes, obtained by fitting a Gaussian to each source. (9) Brightness temperature. When no deconvolved sizes could be obtained, we instead used the solid angle subtended by the synthesised beam for calculating lower limits of TB, i.e.,
, where FWHMM and FWHMm are the major and minor synthesised beam-fitted FWHM (Col. 9 in Table 1), respectively.
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