Table 2
Results for the energy required to drive the Applegate mechanism for all systems considered in this work.
| System | ΔE∕Esec | ||||
|---|---|---|---|---|---|
| Rd∕R = Rd∕R (γ = 0.86) | Rd∕R = 0.85 | Rd∕R = 0.75 | Rd∕R = 0.65 | ||
| RX J2130.6+4710 | 4.2 |
3.6 |
1.8 |
1.7 |
|
| HS 0705+6700 | 1354 | 56 | 22 | 93 | |
| HW Vir | 93 | 43 | 15 | 16 | |
| NN Ser | – | 24 | 9.5 | 6.7 | |
| NSVS 14256825 | 500.5 | 57 | 21 | 13 | |
| NY Vir | – | 54 | 19 | 12 | |
| HU Aqr | 6.3 | 0.88 | 0.41 | 0.25 | |
| QS Vir | 0.88 | 0.22 | 0.097 | 0.078 | |
| RR Cae | 237.3 | 34 | 11 | 6.8 | |
| UZ For | 12 | 1.5 | 0.56 | 0.34 | |
| DP Leo | 0.98 | 0.21 | 0.081 | 0.049 | |
| V471 Tau | 0.039 | 0.061 | 0.036 | – | |
Notes.Rd ∕R denotes the core-shell transition radius. ΔE∕Esec is the necessary energy to drive the change in the quadrupole moment to give raise to the observed period, as a fraction of the available energy, calculated considering different shells including the point at which the observed period matches the calculated, i.e., Rd ∕R. Results with Δ E∕Esec < 1 are highlighted in bold. RX J2130.6+4710 is presented with errors, as mentioned in Sect. 3.2
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