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Laser guide star adaptive optics imaging polarimetry of Herbig Ae/Be stars.

Authors
  • Perrin, Marshall D
  • Graham, James R
  • Paul Kalas
  • Lloyd, James P
  • Max, Claire E
  • Gavel, Donald T
  • Pennington, Deanna M
  • Gates, Elinor L
Type
Published Article
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
Feb 27, 2004
Volume
303
Issue
5662
Pages
1345–1348
Identifiers
PMID: 14988558
Source
SETI Institute
License
Unknown

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.

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