The intermittency of turbulence in interstellar clouds: implications for the gas kinetic temperature and decoupling of heavy particles from the gas motions.

Details The intermittency of turbulence in interstellar clouds: implications for the gas kinetic temperature and decoupling of heavy particles from the gas motions. The intermittency of turbulence in interstellar clouds: implications for the gas kinetic temperature and decoupling of heavy particles from the gas motions.

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...293..840f&link_type=abstract

Astronomy and Astrophysics 293, 840-852 (1995)

Astronomy and Astrophysics

Astrophysics

57

Turbulence, Ism: General, Ism: Clouds, Ism: Kinematics And Dynamics, Ism: Molecules, Ism: Dust, Extinction

Scientific paper

Two impacts of the intermittency of turbulence on the physics and chemistry of interstellar clouds are analyzed. Intermittency describes the uneven distribution in space and time of the velocity gradients, shear and vorticity of a flow, resulting in a non-Gaussian distribution of these quantities and of the kinetic energy dissipation rate. One major effect is the generation of locally very hot regions, with kinetic temperatures spanning a broad distribution up to several 10^3^K in atomic HI clouds and sizes of the order of several 10AU. Another effect is an enhancement of the decoupling of the motions of heavy particles from the turbulent gas motions. We show that intermittency by generating very short timescales in the gas motions is most efficient at decoupling the lightest particles (heavy atoms, large molecules and very small grains) which are those which stay well coupled to the gas when a Kolmogorov spectrum is adopted for the turbulence.

Affiliated with

Also associated with

No associations

Rating

The intermittency of turbulence in interstellar clouds: implications for the gas kinetic temperature and decoupling of heavy particles from the gas motions. 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 The intermittency of turbulence in interstellar clouds: implications for the gas kinetic temperature and decoupling of heavy particles from the gas motions., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The intermittency of turbulence in interstellar clouds: implications for the gas kinetic temperature and decoupling of heavy particles from the gas motions. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1817642