The winds of young Solar-type stars in Coma Berenices and Hercules-Lyra
Article
Article Title | The winds of young Solar-type stars in Coma Berenices and Hercules-Lyra |
---|---|
ERA Journal ID | 1074 |
Article Category | Article |
Authors | Evensberget, D. (Author), Carter, B. D. (Author), Marsden, S. C. (Author), Brookshaw, L. (Author), Folsom, C. P. (Author) and Salmeron, R. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 510 (4), pp. 5226-5245 |
Number of Pages | 20 |
Year | 2022 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab3557 |
Web Address (URL) | https://academic.oup.com/mnras/article/510/4/5226/6458363 |
Abstract | 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 J and a factor of ∼2 in wind mass-loss 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 M ∝ B 0 . 4 and J ∝ B 1 . 0 as a result of pure magnetic scaling. |
Keywords | Stars: Magnetic field; Stars: Rotation; Stars: Solar-type; Stars: winds, outflows; Sun: Evolution; Sun: Heliosphere |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2022 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Centre for Astrophysics |
Centre for Astrophysics | |
University of Tartu, Estonia |
https://research.usq.edu.au/item/q7351/the-winds-of-young-solar-type-stars-in-coma-berenices-and-hercules-lyra
Download files
91
total views58
total downloads3
views this month1
downloads this month