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...
| Published in: | Monthly Notices of the Royal Astronomical Society |
|---|---|
| Main Authors: | , , , |
| Other Authors: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Oxford University Press (OUP)
2020
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1093/mnras/staa3442 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/staa3442/34136049/staa3442.pdf http://academic.oup.com/mnras/article-pdf/500/2/1992/34463146/staa3442.pdf |
| Summary: | 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. |
|---|