Laser Guide Star Adaptive Optics Imaging Polarimetry of Herbig Ae/Be Stars

Abstract

We have used laser guide star adaptive optics and a near-infrared dual-channel imaging polarimeter to observe light scattered in the circumstellar environment of Herbig Ae/Be stars on scales of 100-300 AU. We discover a strongly polarized, biconical nebula 10 arcseconds in diameter (6000 AU) around the star LkHa 198, and also observe a polarized jet-like feature associated with the deeply embedded source LkHa 198-IR. The star LkHa 233 presents a narrow, unpolarized dark lane consistent with an optically thick circumstellar disk blocking our direct view of the star. These data show that the lower-mass T Tauri and intermediate mass Herbig Ae/Be stars share a common evolutionary sequence.

arXiv commentTo appear in Science, 27 February 2004 (4 pages, 2 figures + refs)

References in corpus (5)

• The Formation of Massive Stars from Turbulent Cores
• On the Formation of Massive Stars
• 2-D Radiative Transfer in Protostellar Envelopes: I. Effects of Geometry on Class I Sources
• 2-D Radiative Transfer in Protostellar Envelopes: II. An Evolutionary Sequence
• Imaging Polarimetric Observations of a New Circumstellar Disk System

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