Table 3
Tangential velocities for the 6.7 GHz masers in Cep A averaged over each maser cluster.
| Cluster | V lsr | V x | V y | N spot |
| (km s-1) | (km s-1) | (km s-1) | ||
|
|
||||
| I/II | [−3.3, −1.0] | +0.4 ± 0.3 | +0.2 ± 0.2 | 9 |
| II | [−0.5, −0.3] | ··· | ··· | ··· |
| [−3.5, −2.4] | ··· | ··· | ··· | |
| III | [−4.0, −3.3] | +4.0 ± 0.7 | +1.8 ± 0.2 | 3 |
| IV | [−4.5, −3.7] | −2.9 ± 0.7 | −1.3 ± 0.4 | 7 |
| V | [−5.1, −4.5] | +2.2 ± 0.5 | −1.1 ± 0.7 | 10 |
Notes. Column 1: label of maser cluster; Col. 2: range of l.o.s. velocity in the cluster ([min, max]); Cols. 3, 4: averaged tangential velocity (toward east and north) weighted by the error of each spot’s proper motion with uncertainty estimated as a weighted standard deviation; Col. 5: number of maser spots used to determine the average proper motion of cluster.
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