The complex fossil magnetic field of the δscuti star HD 41641

Only three magnetic δScuti stars are known as of today. HD 41641 is a δScuti 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...

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Bibliographic Details
Main Authors: Thomson-Paressant, K., Neiner, Coralie, Zwintz, Konstanze, Escorza Santos, Ana
Format: Article in Journal/Newspaper
Language:English
Published: 2020
Subjects:
Astronomie
Astrophysique
Sciences de l'espace
Stars: chemically peculiar
Stars: individual: HD 41641
Stars: magnetic field
Stars: oscillations
Stars: variables: Scuti
narval
Online Access:http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/316609
Description
Summary:Only three magnetic δScuti stars are known as of today. HD 41641 is a δScuti 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 δScuti 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. SCOPUS: ar.j DecretOANoAutActif info:eu-repo/semantics/published

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