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Table 3
The parameters of C0121-B from the combined lightcurve and RV modeling.
| Symbol | Parameter name | Value | Units |
|
|
|||
| Orbital parameters | |||
| P | Period | 36.2873 ± 0.0025 | day |
| ecosω | Eccentricity × Cosine Longitude of periastron | 0.0331 ± 0.0003 | – |
| esinω | Eccentricity × Sine Longitude of periastron |
|
– |
| K | RV semiamplitude | 62.2 ± 0.5 | km s-1 |
| γ | Center-of-mass RV at JD = 2 454 889 | 14.5 ± 0.6 | km s-1 |
|
Center-of-mass acceleration | 20.6 ± 2.8 | m s-1 d-1 |
| T | Time of periastron (calculated analytically) | 2 454 876.7 ± 0.7 | JD |
|
|
|||
| Photometric parameters | |||
| T0 | Time of center of primary eclipse | 2 454 844.9152 ± 0.0020 | JD |
| Js | Surface-brightness ratio (secondary/primary) | 0.61 ± 0.23 | – |
| rt | Fractional sum of radii | 0.049 ± 0.006 | – |
| k | Ratio of radii (secondary/primary) | 0.60 ± 0.25 | – |
| x | Impact parameter |
|
– |
| L3 | Third-light (blending) fraction | 0.86 ± 0.04 | – |
| up | Limb-darkening coefficient of primary (fixed) | 0.55 | – |
| us | Limb-darkening coefficient of secondary (fixed) | 0.58 | – |
|
|
|||
| Other estimated parameters | |||
| i | inclination (see Eq. (2)) |
|
degree |
| aBb | Semimajor axis of secondary | 0.2076 ± 0.0017 | AU |
| f | Mass function of Bb | 0.903 ± 0.022 | M⊙ |
| q | Mass ratio (MBa/MBb) assuming MBb = 1.3 M⊙ | 1.73 ± 0.03 | – |
| FBb:FBa | The Bb:Ba flux ratio |
|
– |
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