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Millimetre and submillimetre molecular line observations of the southwest lobe of L 1551 - evidence of a shell structure

Rainey, Ruth; White, Glenn J.; Richardson, K. J.; Griffin, M. J.; Cronin, N. J.; Monteiro, T. S. and Hilton, J. (1987). Millimetre and submillimetre molecular line observations of the southwest lobe of L 1551 - evidence of a shell structure. Astronomy and Astrophysics, 179 pp. 237–248.

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Observations have been made of the southwest outflow lobe of L 1551 in several millimetre and submillimetre molecular lines. Maps have been made in the J = 3-2 and J = 2-1 transitions of CO over areas of 7.5 by 2.5 arcmin and 5 by 5 arcmin respectively, using the 3.8 m United Kingdom Infrared Telescope (UKIRT). Higher angular resolution maps have also been made in the J = 2-1 CO transition over an area of about 6 by 3.5 arcmin with the NRAO 12 m telescope, and additional observations of the J = 4-3 transitions of HCN, HCO+, and H13CO+ were obtained towards selected positions. The observations, showing a shell structure, an accelerating outflow and possible rotation of the outflowing gas, suggest that the Sweeping-Magnetic-Twist model of Uchida and Shibata is the most appropriate of currently available models of bipolar sources, to explain the L 1551 bipolar outflow.

Item Type: Journal Article
Copyright Holders: 1987 European Southern Observatory
ISSN: 1432-0746
Keywords: interstellar matter; line spectra; millimeter waves; molecular spectra; stellar envelopes; submillimeter waves; astronomical maps; carbon monoxide; infrared sources (astronomy); red shift; stellar evolution
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 33507
Depositing User: Glenn White
Date Deposited: 18 May 2012 09:51
Last Modified: 01 May 2013 20:53
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