Asteroseismology reveals the near-core magnetic field strength in the early-B star HD 43317
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866913580509560832 |
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| author | Bowman, D. M. Lecoanet, D. Van Reeth, T. |
| author_facet | Bowman, D. M. Lecoanet, D. Van Reeth, T. |
| contents | Spectropolarimetic campaigns have established that large-scale magnetic fields are present at the surfaces of approximately 10% of massive dwarf stars. However, there is a dearth of magnetic field measurements for their deep interiors. Asteroseismology of gravity-mode pulsations combined with rotating magneto-hydrodynamical calculations of the early-B main-sequence star HD 43317 constrain its magnetic field strength to be approximately $5\times10^{5}$ G just outside its convective core. This proof-of-concept study for magneto-asteroseismology opens a new window into the observational characterisation of magnetic fields inside massive stars. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2207_08526 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Asteroseismology reveals the near-core magnetic field strength in the early-B star HD 43317 Bowman, D. M. Lecoanet, D. Van Reeth, T. Solar and Stellar Astrophysics Spectropolarimetic campaigns have established that large-scale magnetic fields are present at the surfaces of approximately 10% of massive dwarf stars. However, there is a dearth of magnetic field measurements for their deep interiors. Asteroseismology of gravity-mode pulsations combined with rotating magneto-hydrodynamical calculations of the early-B main-sequence star HD 43317 constrain its magnetic field strength to be approximately $5\times10^{5}$ G just outside its convective core. This proof-of-concept study for magneto-asteroseismology opens a new window into the observational characterisation of magnetic fields inside massive stars. |
| title | Asteroseismology reveals the near-core magnetic field strength in the early-B star HD 43317 |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2207.08526 |