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Methanol in the L1551 circumbinary torus

White, Glenn J.; Fridlund, C. W. M.; Bergman, P.; Beardsmore, A.; Liseau, René; Price, M. and Phillips, R. R. (2006). Methanol in the L1551 circumbinary torus. Astrophysical Journal Letters, 651(1) L41-L44.

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We report observations of gaseous methanol in an edge-on torus surrounding the young stellar object L1551 IRS 5. The peaks in the torus are separated by similar to 10,000 AU from L1551 IRS 5 and contain similar to 0.03 M<syb>⊕</sub>of cold CH3OH. We infer that the CH3OH abundance increases in the outer part of the torus, probably as a result of methanol evaporation from dust grain surfaces heated by the shock luminosity associated with the shocks associated with the jets of an externally located X-ray source. Any methanol released in such a cold environment will rapidly freeze again, spreading CH3OH throughout the circumbinary torus to nascent dust grains, planetesimals, and primitive bodies. These observations probe the initial chemical conditions of matter infalling onto the disk.

Item Type: Journal Item
Copyright Holders: 2006 The American Astronomical Society
ISSN: 1538-4357
Keywords: HH 154; L1551; IRS 5; jets; outflows
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
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Item ID: 6350
Depositing User: Astrid Peterkin
Date Deposited: 25 Jan 2007
Last Modified: 07 Dec 2018 09:00
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