Large-Scale Turbulence in Molecular Clouds

Details Large-Scale Turbulence in Molecular Clouds Large-Scale Turbulence in Molecular Clouds

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...583..280b&link_type=abstract

The Astrophysical Journal, Volume 583, Issue 1, pp. 280-295.

Astronomy and Astrophysics

Astronomy

37

Ism: Clouds, Ism: Kinematics And Dynamics, Ism: Molecules, Methods: Statistical, Radio Lines: Ism, Turbulence

Scientific paper

Principal component analysis of 12CO (J=1-0) emission is used to diagnose the presence of large-scale, global velocity fluctuations in molecular clouds. We search for, and find, large-scale flows of atomic material in which the globally turbulent molecular clouds are embedded. This is consistent with the picture of molecular clouds existing as short-lived, turbulent density fluctuations within larger scale atomic flows. Large-scale driving of turbulence in molecular clouds, by converging flows of atomic material, can reconcile recent numerical determinations of the dissipation rate of turbulent energy with the observations, that otherwise, for small-scale driving, leads to unacceptably high cloud luminosities. On the other hand, lack of large-scale shock signatures in the molecular gas, as expected for large-scale driving, may, if not due to an observational bias, require that the large-scale flows are themselves driven by energy injection occurring on smaller scales within molecular clouds.

Affiliated with

Also associated with

No associations

Rating

Large-Scale Turbulence in Molecular Clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Large-Scale Turbulence in Molecular Clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-Scale Turbulence in Molecular Clouds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1525940