Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap%26ss.235..165h&link_type=abstract
Astrophysics and Space Science, Volume 235, Issue 1, pp.165-168
Astronomy and Astrophysics
Astrophysics
7
Scientific paper
We showed in earlier work that a clump embedded in tenuous plasma, which is flowing subsonically relative to the clump, will develop a long thin tail whether the gas in the tail behaves adiabatically or isothermally. This paper presents a criterion for determining if viscous dissipation in a tail with result in heating that will cause such a tail to be wide. We argue that the observed properties of the tails in NGC 7293 imply that a very strong effective viscous couple exists across each of them. Assuming a strong couple, we calculate the viscous energy dissipation rate per unit volume and derive an upper bound on the number density in a tail in which viscous heating raises the temperature significantly and thus causes broadening. The densities in observed broad tails in Abell 30 exceed this upper bound, and we suggest that the broadening of those tails is due to a phase transition in the tail gas, caused by photo-absorption heating. We comment on the relationship of intermediate-scale structures in clumpy media to the issue of whether or not a global tenous flow can be considered to be mass-loaded.
Dyson John E.
Hartquist Thomas W.
Williams Richard J.
No associations
LandOfFree
Wide Intermediate Scale Structures in Mass-Loaded Flows 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 Wide Intermediate Scale Structures in Mass-Loaded Flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide Intermediate Scale Structures in Mass-Loaded Flows will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-968499