| Autor: |
Evensberget, D, Carter, B D, Marsden, S C, Brookshaw, L, Folsom, C P, Salmeron, R |
| Předmět: |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; 3/15/2022, Vol. 510 Issue 4, p5226-5245, 20p |
| Abstrakt: |
We present wind models of 10 young Solar-type stars in the Hercules-Lyra association and the Coma Berenices cluster aged around ∼0.26 and ∼0.58 Gyr, respectively. Combined with five previously modelled stars in the Hyades cluster, aged ∼0.63 Gyr, we obtain a large atlas of 15 observationally based wind models. We find varied geometries, multi-armed structures in the equatorial plane, and a greater spread in quantities such as the angular momentum loss. In our models, we infer variation of a factor of ∼6 in wind angular momentum loss |$\dot{J}$| and a factor of ∼2 in wind mass-loss |$\dot{M}$| based on magnetic field geometry differences when adjusting for the unsigned surface magnetic flux. We observe a large variation factor of ∼4 in wind pressure for an Earth-like planet; we attribute this to variations in the 'magnetic inclination' of the magnetic dipole axis with respect to the stellar axis of rotation. Within our models, we observe a tight correlation between unsigned open magnetic flux and angular momentum loss. To account for possible underreporting of the observed magnetic field strength we investigate a second series of wind models where the magnetic field has been scaled by a factor of 5. This gives |$\dot{M}\propto B^{0.4}$| and |$\dot{J}\propto B^{1.0}$| as a result of pure magnetic scaling. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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