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Herbig Ae/Be stars are young, pre-main-sequence stars that sample thetransition in structure and evolution between low- and high-mass stars,providing a key test of accretion processes in higher-mass stars. Few HerbigAe/Be stars have detected magnetic fields, calling into question whether themagnetospheric accretion paradigm developed for low-mass stars can be scaled tohigher masses. We present He I 10830 \AA\ line profiles for 64 Herbig Ae/Bestars with a magnetic field measurement in order to test magnetosphericaccretion in the physical regime where its efficacy remains uncertain. Of the 5stars with a magnetic field detection, 1 shows redshifted absorption,indicative of infall, and 2 show blueshifted absorption, tracing mass outflow.The fraction of redshifted and blueshifted absorption profiles in thenon-magnetic Herbig Ae/Be stars is remarkably similar, suggesting that thestellar magnetic field does not affect gas kinematics traced by He I 10830 \AA.Line profile morphology does not correlate with the luminosity, rotation rate,mass accretion rate, or disk inclination. Only the detection of a magneticfield and a nearly face-on disk inclination show a correlation (albeit for fewsources). This provides further evidence for weaker dipoles and more complexfield topologies as stars develop a radiative envelope. The small number ofmagnetic Herbig Ae/Be stars has already called into question whethermagnetospheric accretion can be scaled to higher masses; accretion signaturesare not substantially different in magnetic Herbig Ae/Be stars, casting furtherdoubt that they accrete in the same manner as classical T Tauri stars.

astrophysical journal/the astrophysical journal

Linking Signatures of Accretion with Magnetic Field Measurements - Line  Profiles are not Significantly Different in Magnetic and Non-Magnetic Herbig  Ae/Be Stars