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Table 3
η Cet system best fits (Jacobi coordinates).
| Orb. Param. | η Cet b | η Cet c | ||
| Best Keplerian | ||||
| P [days] | 403.5± 1.5 | 751.9± 3.8 | ||
| m [MJup] | 2.55± 0.13 | 3.32± 0.18 | ||
| e | 0.13± 0.05 | 0.1± 0.06 | ||
| M [deg] | 193.5± 24.6 | 240.5± 34.8 | ||
| ϖ [deg] | 250.6± 20.5 | 67.54± 5.2 | ||
| K1 [m s-1] | 49.7 | 52.4 | ||
| a [AU] | 1.27 | 1.93 | ||
| rms [m s-1 ] | 15.9 | |||
| RVoffset [m s-1] | −0.77 | |||
|
13.67 (1.17 with jitter) | |||
| Orb. Param. | η Cet b | η Cet c | Orb. Param. | η Cet b | η Cet c | |||||
| Best coplanar edge-on | 2:1 MMR coplanar edge-on | |||||||||
| P [days] | 407.5± 2.67 | 739.9± 4.8 | P [days] | 407.5± 2.67 | 744.5± 3.71 | |||||
| m [MJup] | 2.55± 0.16 | 3.26± 0.17 | m [MJup] | 2.54± 0.16 | 3.28± 0.19 | |||||
| e | 0.12± 0.05 | 0.08± 0.04 | e | 0.155± 0.05 | 0.025± 0.05 | |||||
| M [deg] | 208.2± 13.7 | 227.8± 19.6 | M [deg] | 211.1± 45.33 | 268.0± 21.33 | |||||
| ϖ [deg] | 245.4± 9.5 | 68.2± 22.3 | ϖ [deg] | 244.7± 31.64 | 32.5± 32.72 | |||||
| K1 [m s-1] | 49.4 | 51.6 | K1 [m s-1] | 49.6 | 51.7 | |||||
| a [AU] | 1.28 | 1.91 | a [AU] | 1.28 | 1.92 | |||||
| rms [m s-1] | 15.19 | rms [m s-1] | 15.28 | |||||||
| RVoffset [m s-1] | 0.0 | RVoffset [m s-1] | −0.08 | |||||||
|
|
11.39 (1.001 with jitter) |
|
11.65 (1.013 with jitter) | |||||||
| Best coplanar inclined | 2:1 MMR coplanar inclined | |||||||||
| P [days] | 396.8± 0.1 | 767.1± 0.27 | P [days] | 407.3± 2.1 | 744.3± 4.1 | |||||
| m [MJup] | 3.85± 0.03 | 5.52± 0.02 | m [MJup] | 2.46± 0.12 | 3.16± 0.2 | |||||
| e | 0.24± 0.05 | 0.1± 0.01 | e | 0.17± 0.05 | 0.02± 0.03 | |||||
| M [deg] | 163.3± 0.1 | 78.8± 0.05 | M [deg] | 208.9± 16.1 | 262.7± 41.2 | |||||
| ϖ [deg] | 292.2± 0.1 | 221.3± 0.1 | ϖ [deg] | 247.2± 13.5 | 36.67± 41.1 | |||||
| i [deg] | 35.5 | 35.5 | i [deg] | 81.9 | 81.9 | |||||
| K1 [m s-1] | 44.8 | 50.2 | K1 [m s-1] | 49.8 | 51.6 | |||||
| a [AU] | 1.26 | 1.96 | a [AU] | 1.28 | 1.92 | |||||
| rms [m s-1] | 14.56 | rms [m s-1] | 15.2 | |||||||
| RVoffset [m s-1] | −3.28 | RVoffset [m s-1] | −0.58 | |||||||
|
|
10.89 (0.925 with jitter) |
|
11.84 (1.04 with jitter) | |||||||
| Best mutually inclined | 2:1 MMR mutually inclined | |||||||||
| P [days] | 404.4± 2.7 | 748.2± 6.8 | P [days] | 407.8± 2.9 | 742.2± 4.5 | |||||
| m [MJup] | 5.5± 1.08 | 7.74± 1.45 | m [MJup] | 2.45± 0.12 | 3.14± 0.17 | |||||
| e | 0.06± 0.06 | 0.05± 0.07 | e | 0.13± 0.05 | 0.06± 0.04 | |||||
| M [deg] | 168.4± 28.1 | 145.3± 31.1 | M [deg] | 209.0± 15.4 | 247.2± 54.5 | |||||
| ϖ [deg] | 283.7± 23.3 | 138.8± 70.2 | ϖ [deg] | 246.8± 12.7 | 51.1± 52.2 | |||||
| i [deg] | 151.7± 24.9 | 155.0± 34.6 | i [deg] | 88.0 | 92.0 | |||||
| ΔΩ [deg] | 345.4± 46.4 | ΔΩ [deg] | 0.0 | |||||||
| K1 [m s-1] | 50.2 | 52.1 | K1 [m s-1] | 47.7 | 49.5 | |||||
| a [AU] | 1.28 | 1.93 | a [AU] | 1.29 | 1.92 | |||||
| rms [m s-1] | 14.61 | rms [m s-1] | 15.4 | |||||||
| RVoffset [m s-1] | −1.89 | RVoffset [m s-1] | −0.46 | |||||||
|
|
10.90 (0.95 with jitter) |
|
11.84 (1.03 with jitter) | |||||||
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