The complex fossil magnetic field of the δscuti star HD 41641

• 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

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