Open Access
Table 3
Tidal factor fe in the expression of the eccentricity derivative (Eq. (14)) as a function of the orbital obliquity ψ, the angle between the orbital and stellar rotational plane, measured from the stellar equator, for an equatorial orbit EO (ψ = 0), and for a polar orbit PO (ψ = 90°).
| Case | General expression | EO | PO |
|---|---|---|---|
| P < 1/2 P* |  |
 |
 |
| P = 1/2 P* |  |
 |
 |
| 1/2 P* < P < P* |  |
 |
 |
| P = P* |  |
+7 |  |
| P* < P < 3/2 P* |  |
 |
 |
| P = 3/2 P* |  |
 |
 |
| 3/2 P* < P < 2P* |  |
 |
 |
| P = 2P* |  |
 |
 |
| 2P* < P < 3P* |  |
 |
 |
| P = 3P* |  |
 |
 |
| P > 3P* |  |
 |
 |
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