Rainey, Ruth; White, Glenn J.; Richardson, K. J.; Griffin, M. J.; Cronin, N. J.; Monteiro, T. S. and Hilton, J.
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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|
|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:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||G. J. White|
|Date Deposited:||18 May 2012 09:51|
|Last Modified:||03 Aug 2016 05:08|
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