The complex fossil magnetic field of the δ Scuti star HD 41641
ABSTRACT Only three magnetic δ Scuti stars are known as of today. HD 41641 is a δ Scuti star showing chemical peculiarities and rotational modulation of its light curve, making it a good magnetic candidate. We acquired spectropolarimetric observations of this star with NARVAL at Télescope Bernard Ly...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2021-01, Vol.500 (2), p.1992-1999 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
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| Zusammenfassung: | ABSTRACT
Only three magnetic δ Scuti stars are known as of today. HD 41641 is a δ Scuti star showing chemical peculiarities and rotational modulation of its light curve, making it a good magnetic candidate. We acquired spectropolarimetric observations of this star with NARVAL at Télescope Bernard Lyot (TBL) to search for the presence of a magnetic field and characterize it. We indeed clearly detect a magnetic field in HD 41641, making it the fourth known magnetic δ Scuti star. Our analysis shows that the field is of fossil origin, like magnetic OBA stars, but with a complex field structure rather than the much more usual dipolar structure. |
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| ISSN: | 0035-8711 1365-2966 |
| DOI: | 10.1093/mnras/staa3442 |