Magnetic topologies of the Herbig Ae/Be stars
E. Alecian (RMC), G.A. Wade (RMC), C. Catala (LESIA), S. Bagnulo, (Armagh Obs.), T. B\"ohm (LATT), J.-C. Bouret (LAM), J.-F. Donati (LATT), C., Folsom (Armagh Obs.), J. Grunhut (RMC), J.D. Landstreet (UWO), P. Petit, (LATT), J. Silvester (RMC)
TL;DR
This paper investigates the magnetic field structures of Herbig Ae/Be stars to understand the origin of magnetism in intermediate-mass stars, supporting the fossil field hypothesis through observational characterization.
Contribution
It introduces methods for characterizing magnetic fields in Herbig Ae/Be stars and provides initial insights into their magnetic origins, linking to main sequence star magnetism.
Findings
Magnetic fields observed in Herbig Ae/Be stars support the fossil field hypothesis.
Characterization methods for stellar magnetic fields are outlined.
Initial results suggest similarities between pre-main sequence and main sequence star magnetism.
Abstract
Our recent discoveries of magnetic fields in a small number of Herbig Ae/Be (HAeBe) stars, the evolutionary progenitors of main sequence A/B stars, raise new questions about the origin of magnetic fields in the intermediate mass stars. The favoured fossil field hypothesis suggests that a few percent of magnetic pre-main sequence A/B stars should exhibit similar magnetic strengths and topologies to the magnetic Ap/Bp stars. In this talk I will present the methods that we have used to characterise the magnetic fields of the Herbig Ae/Be stars, as well as our first conclusions on the origin of magnetism in intermediate-mass stars.
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Taxonomy
TopicsAstro and Planetary Science · Stellar, planetary, and galactic studies · Astrophysics and Star Formation Studies