Magnetic fields in PMS stars: HARPS spectropolarimetry of sharp-lined Herbig Ae stars
Herbig Ae/Be-type stars are analogs of T Tauri stars in the higher mass
range. Spectropolarimetric studies involving sharp-lined Herbig Ae stars
appear to be a promising approach for the detection of their magnetic fields.
We report the results of our HARPS high-resolution spectropolarimetric
analysis of four Herbig Ae stars with low v sin i values: HD 101412,
HD 104237, HD 190073, and PDS 2. The role of contamination by the surrounding
warm circumstellar matter for the appearance of Zeeman features is discussed
for the first time.