University of Hertfordshire

From the same journal

From the same journal

H alpha spectropolarimetry of the Herbig Ae star AB Aurigae

Research output: Contribution to journalArticle

  • J.E. Drew
  • M. Pontefract
  • T.J. Harries
  • R.D. Oudmaijer
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Original languageEnglish
Pages (from-to)L19-L23
JournalMonthly Notices of the Royal Astronomical Society
Publication statusPublished - 2000


We present spectropolarimetric observations, obtained at Hα, of the Herbig Ae star AB Aurigae. Changes in linear polarization across the Hα line probe structure in the immediate circumstellar environment of the central star, down to scales of the order of one to a few stellar radii. In the case of AB Aurigae the observed polarimetric signature is complex. After applying a correction for foreground continuum polarization, we find that there is a linear-polarized Hα emission component intrinsic to the source. Rotation of the angle of polarization through the emission-line profile suggests scattering in a rotating circumstellar disc. The magnetic accretor model commonly applied to T Tauri stars shows promise of explaining these data.


‘The definitive version is available at’ Copyright Blackwell Publishing. DOI: 10.1046/j.1365-8711.2000.04118.x [Full text of this article is not available in the UHRA]

ID: 167509