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20 April 2024

» arxiv » astro-ph/0402615

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Laser Guide Star Adaptive Optics Imaging Polarimetry of Herbig Ae/Be Stars
Marshall D. Perrin ; James R. Graham ; Paul Kalas ; James P. Lloyd ; Claire E. Max ; Donald T. Gavel ; Deanna M. Pennington ; Elinor L. Gates ;
Date:	26 Feb 2004
Journal:	Science 303 (2004) 1345
Subject:	astro-ph
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.
Source:	arXiv, astro-ph/0402615
Other source:	[GID 428127] pmid14988558
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