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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: |
27 Feb 2004 | | Journal: | Science, 303 (5662), 1345-8 | | 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 to 300 astronomical units. We revealed a strongly polarized, biconical nebula 10 arc seconds (6000 astronomical units) in diameter around the star LkHalpha 198 and also observed a polarized jet-like feature associated with the deeply embedded source LkHalpha 198-IR. The star LkHalpha 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: | PubMed, pmid14988558 doi: 10.1126/science.1094602 | | Other source: | [GID 428127] astro-ph/0402615 | | Services: | Forum | Review | Favorites | |
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