Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..147a&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Sept. 1, 1984, p. 147-158.
Astronomy and Astrophysics
Astrophysics
21
Emission Spectra, Molecular Clouds, Plasma Acceleration, Quasars, Taylor Instability, Gas Viscosity, Line Spectra, Plasma Density, Viscous Damping
Scientific paper
The present discussion of the acceleration of dense features in astrophysical systems to high velocities, in view of the Rayleigh-Taylor instability, suggests that such features must be formed in comoving relationship to an ambient hot flux, unless they are stabilized by viscosity. Radiative acceleration and coherent acceleration by cosmic rays are unable to produce the large velocities required without disruption. The present stability criterion is satisfied in cases where clouds form by means of thermal instabilities in a supersonic wind or behind a single shock, although the large velocities can then only be attained at large radial distances (where the shock speed is sufficiently high). The multiple shock acceleration that produces high velocity clouds at lower radii is viable if the clouds are strongly turbulent.
No associations
LandOfFree
On the viability of acceleration mechanisms for high-velocity clouds and quasar emission-line 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 On the viability of acceleration mechanisms for high-velocity clouds and quasar emission-line clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the viability of acceleration mechanisms for high-velocity clouds and quasar emission-line clouds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1396544