The magnetic fields and stellar winds of the mature late F-stars: β Virginis and θ Draconis
Article
Article Title | The magnetic fields and stellar winds of the mature late F-stars: β Virginis and θ Draconis |
---|---|
ERA Journal ID | 1074 |
Article Category | Article |
Authors | Seach, J. M. (Author), Marsden, S. C. (Author), Carter, B. D. (Author), Evensberget, D. (Author), Folsom, C. P. (Author), Neiner, C. (Author) and Mengel, M. W. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 509 (4), pp. 5117-5141 |
Number of Pages | 25 |
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/stab3289 |
Web Address (URL) | https://academic.oup.com/mnras/article/509/4/5117/6427375 |
Abstract | Mapping the large-scale magnetic field in late F-type stars is important for understanding the nature of the stellar dynamo and the dynamics of thin outer convection zones. We use Zeeman Doppler Imaging to produce multi-epoch maps of the surface magnetic field for two mature late F-type stars: β Virginis (F9V) and θ Draconis (F8IV). We also provide a magnetohydrodynamic model for the stellar winds from the corona to the inner astrosphere, which exists in an environment at the hot end of habitability for exoplanets. Our results show that either simple or complex dynamo magnetic fields are present in mature late F-type stars, with shallow outer convection zones. The results of stellar wind modelling show the average space weather for β Vir at a distance of 1 au falls within the range of space weather conditions observed at Earth, while θ Dra produces a wind pressure an order of magnitude stronger than the Sun's wind pressure. |
Keywords | stars: activity; stars: magnetic field; stars: solar-type; stars: winds, outflows |
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 | |
University of Paris, France |
https://research.usq.edu.au/item/q78z1/the-magnetic-fields-and-stellar-winds-of-the-mature-late-f-stars-virginis-and-draconis
Download files
Published Version
94
total views57
total downloads8
views this month1
downloads this month