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Table 2.
Precessing nozzle model for jet-A with a period of 25 yr.
| Knot | t0 | ω(rad) | Γ | t0, VLBI | Reference |
|---|---|---|---|---|---|
| C3 | 1971.60 | 2π+4.23 | 8.5–11 | 1972.6 ± 1.1 | Unwin et al. (1989) |
| C4 | 1984.68 | 2π+0.94 | 14.3 | 1984.68 ± 0.3 | Wehrle et al. (2001) |
| C7a | 1994.67 | 4.71 | 10.5 | 1994.67 ± 0.5 | Jorstad & Marscher (2005) |
| C8 | 1995.70 | 4.45 | 10.3 | 1996.10 ± 0.31 | Jorstad & Marscher (2005) |
| C9 | 1996.89 | 4.15 | 17.5 | 1996.89 ± 0.12 | Chatterjee et al. (2008) |
| C10 | 1997.24 | 4.06 | 16.0 | 1997.24 ± 0.16 | Chatterjee et al. (2008) |
| C11 | 1997.59 | 3.97 | 16.0 | 1997.59 ± 0.11 | Chatterjee et al. (2008) |
| C12 | 1998.48 | 3.75 | 21–19 | 1998.56 ± 0.09 | Chatterjee et al. (2008) |
| C13 | 1998.88 | 3.65 | 17–20.5 | 1998.98 ± 0.07 | Chatterjee et al. (2008) |
| C14 | 1999.40 | 3.52 | 17.5–23 | 1999.50 ± 0.09 | Chatterjee et al. (2008) |
| C15 | 1999.76 | 3.43 | 19 | 1999.85 ± 0.05 | Chatterjee et al. (2008) |
| C16 | 2000.15 | 3.33 | 17–25 | 2000.27 ± 0.05 | Chatterjee et al. (2008) |
| C21 | 2004.67 | 2.20 | 26–21 | 2004.75 ± 0.05 | Chatterjee et al. (2008) |
| C22 | 2005.09 | 2.09 | 18–15.7 | 2005.18 ± 0.06 | Chatterjee et al. (2008) |
| C23 | 2006.23 | 1.80 | 30–22 | 2006.41 ± 0.15 | Larionov et al. (2008) |
| C24 | 2006.87 | 1.64 | 24–14 | 2006.90 ± 0.11 | Jorstad et al. (2017) |
| C25 | 2007.07 | 1.590 | 16–19 | 2007.09 ± 0.09 | Jorstad et al. (2017) |
| C26 | 2007.09 | 1.587 | 11.5 | 2007.10 ± 0.14 | Jorstad et al. (2017) |
Notes. The table lists: modeled ejection epoch t0, precession phase ω, range of bulk Lorentz factor Γ; VLBI measured ejection epoch t0, VLBI and references.
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