Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0805.4645)
· References in the article
· Citations to the Article (8) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Outflow-Driven Turbulence in Molecular Clouds
Authors:
Carroll, Jonathan J.; Frank, Adam; Blackman, Eric G.; Cunningham, Andrew J.; Quillen, Alice C.
Affiliation:
AA(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14620, USA ), AB(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14620, USA ), AC(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14620, USA ), AD(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14620, USA ; Lawrence Livermore National Laboratory, Livermore, CA 94550, USA), AE(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14620, USA )
Publication:
The Astrophysical Journal, Volume 695, Issue 2, pp. 1376-1381 (2009). (ApJ Homepage)
Publication Date:
04/2009
Origin:
IOP
ApJ Keywords:
ISM: jets and outflows, ISM: kinematics and dynamics, turbulence
DOI:
10.1088/0004-637X/695/2/1376
Bibliographic Code:
2009ApJ...695.1376C

Abstract

In this paper, we explore the relationship between protostellar outflows and turbulence in molecular clouds. Using three-dimensional numerical simulations we focus on the hydrodynamics of multiple outflows interacting within a parsec scale volume. We explore the extent to which transient outflows injecting directed energy and momentum into a subvolume of a molecular cloud can be converted into random turbulent motions. We show that turbulence can readily be sustained by these interactions and it is possible to broadly characterize an effective driving scale of the outflows. We compare the velocity spectrum obtained in our studies with that of isotropically forced hydrodynamic turbulence finding that in outflow-driven turbulence a power law of the form E(k) vprop k -β is indeed achieved. However, we find that a steeper spectrum β ~ 2.74 is obtained in outflow-driven turbulence models than in isotropically forced simulations β ~ 2.45. We discuss possible physical mechanisms responsible for these results as well as their implications for turbulence in molecular clouds where outflows will act in concert with other processes such as gravitational collapse.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints