A Bcool magnetic snapshot survey of solar-type stars
Article
Article Title | A Bcool magnetic snapshot survey of solar-type stars |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Marsden, S. C. (Author), Petit, P. (Author), Jeffers, S. V. (Author), Morin, J. (Author), Fares, R. (Author), Reiners, A. (Author), do Nascimento Jr., J.-D. (Author), Auriere, M. (Author), Bouvier, J. (Author), Carter, B. D. (Author), Catala, C. (Author), Dintrans, B. (Author), Donati, J. -F. (Author), Gastine, T. (Author), Jardine, M. (Author), Konstantinova-Antova, R. (Author), Lanoux, J. (Author), Lignieres, F. (Author), Morgenthaler, A. (Author), Ramirez-Velez, J. C. (Author), Theado, S. (Author) and Van Grootel, V. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 444 (4), pp. 3517-3536 |
Number of Pages | 20 |
Year | 2014 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stu1663 |
Web Address (URL) | https://academic.oup.com/mnras/article/444/4/3517/1020893 |
Abstract | We present the results of a major high-resolution spectropolarimetric BCool project magnetic survey of 170 solar-type stars. Surface magnetic fields were detected on 67 stars, with 21 classified as mature solar-type stars, a result that increases by a factor of 4 the number of mature solar-type stars on which magnetic fields have been observed. In addition, a magnetic field was detected for 3 out of 18 of the subgiant stars surveyed. For the population of K-dwarfs, the mean value of |Bl|(|Bl| mean) was also found to be higher (5.7 G) than |Bl| mean measured for the G-dwarfs (3.2 G) and the F-dwarfs (3.3 G). For the sample as a whole, |Bl| mean increases with rotation rate and decreases with age, and the upper envelope for |Bl| correlates well with the observed chromospheric emission. Stars with a chromospheric S-index greater than about 0.2 show a high magnetic field detection rate and so offer optimal targets for future studies. This survey constitutes the most extensive spectropolarimetric survey of cool stars undertaken to date, and suggests that it is feasible to pursue magnetic mapping of a wide range of moderately active solar-type stars to improve our understanding of their surface fields and dynamos. |
Keywords | profiles; stars; magnetic fields |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
510105. General relativity and gravitational waves | |
519999. Other physical sciences not elsewhere classified | |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2014 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 | Computational Engineering and Science Research Centre |
University of Toulouse, France | |
Georg August University of Gottingen, Germany | |
University of Montpellier, France | |
University of St Andrews, United Kingdom | |
Federal University of Rio Grande do Norte, Brazil | |
Institute of Planetology and Astrophysics of Grenoble, France | |
Laboratory of Space Science and Astrophysical Instrumentation, France | |
Max Planck Society, Germany | |
Bulgarian Academy of Sciences, Bulgaria | |
National Autonomous University of Mexico, Mexico | |
University of Liege, Belgium |
https://research.usq.edu.au/item/q2343/a-bcool-magnetic-snapshot-survey-of-solar-type-stars
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