Magnetic Delta Scuti Stars

<p>Magnetic delta Scuti stars have been discovered only recently. As of today, 4 of them are known. They display very diverse magnetic field properties in terms of strength, topology, and origin. HD188774 hosts a fossil dipolar magnetic field typical of hot stars, beta Cas hosts a dynamo field in spite of its temperature (6920 K) possibly due to the fact it is rapidly rotating, rho Pup hosts a very weak field making it a cool counterpart of the magnetic Am stars, while the newly discovered magnetic star HD41641 is one of the rare cases hosting a fossil but complex magnetic field. I will summarize our current knowledge about magnetic delta Scuti stars and present in particular the latest discovery of HD41641 and its potential for magneto-asteroseismology. Indeed, Escorza et al. (2016) detected a number of frequencies associated with oscillation modes present within the star, with periods ranging between 10 and 20 d^-1, making this star a good target for magneto-asteroseismology.</p>