A magnetic snapshot survey of F-type stars
Article
Article Title | A magnetic snapshot survey of F-type stars |
---|---|
ERA Journal ID | 1074 |
Article Category | Article |
Authors | Seach, J. M. (Author), Marsden, S. C. (Author), Carter, B. D. (Author), Neiner, C. (Author), Folsom, C. P. (Author), Mengel, M. W. (Author), Oksala, M. E. (Author) and Buysschaert, B. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 494 (4), pp. 5682-5703 |
Number of Pages | 22 |
Year | 2020 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/staa1107 |
Web Address (URL) | https://academic.oup.com/mnras/article/494/4/5682/5824663 |
Abstract | We present a spectropolarimetric magnetic snapshot survey of 55 stars which includes 53 F-type stars ranging from spectral types F0 to F9 plus 2 chemically peculiar stars β CrB, and δCap. We look for magnetic fields in stars spanning a range of effective temperatures where the transition from fossil to dynamo magnetic fields is believed to occur. High-resolution spectropolarimetry using circularly polarized spectra is used to look for a magnetic detection in the Stokes V profile, determine the mean longitudinal magnetic field (Bl), and to look for correlations with stellar parameters. Surface magnetic fields are detected on 14 F-stars, and present in every spectral class from F3V-F9V ranging in strength from 0.3 ± 0.1 G (36 UMa, F8V) to 8.3 ± 0.9 G (h Dra, F8V). Thus we find photospheric magnetic fields are present in stars as early as spectral type F3V with an outer convection zone thickness less than a few per cent of the stellar radius. |
Keywords | stars: early-type; stars: late-type; stars: magnetic field |
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 ©: 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Centre for Astrophysics |
University of Paris, France | |
University of Toulouse, France | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q606v/a-magnetic-snapshot-survey-of-f-type-stars
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