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The JCMT Gould Belt Survey: Understanding the influence of outflows on Gould Belt clouds

Drabek-Maunder, Emily, Hatchell, J., Buckle, J. V., Di Francesco, J. and Richer, J. 2016. The JCMT Gould Belt Survey: Understanding the influence of outflows on Gould Belt clouds. Monthly Notices of the Royal Astronomical Society: Letters 457 (1) , L84-L88. 10.1093/mnrasl/slv202

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Abstract

Using James Clerk Maxwell Telescope (JCMT) Gould Belt Survey data from CO J = 3 → 2 isotopologues, we present a meta-analysis of the outflows and energetics of star-forming regions in several Gould Belt clouds. The majority of the regions are strongly gravitationally bound. There is evidence that molecular outflows transport large quantities of momentum and energy. Outflow energies are at least 20 per cent of the total turbulent kinetic energies in all of the regions studied and greater than the turbulent energy in half of the regions. However, we find no evidence that outflows increase levels of turbulence, and there is no correlation between the outflow and turbulent energies. Even though outflows in some regions contribute significantly to maintaining turbulence levels against dissipation, this relies on outflows efficiently coupling to bulk motions. Other mechanisms (e.g. supernovae) must be the main drivers of turbulence in most if not all of these regions.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Wiley
ISSN: 1745-3925
Date of Acceptance: 10 December 2015
Last Modified: 13 Nov 2017 11:23
URI: http://orca-mwe.cf.ac.uk/id/eprint/105763

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