Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110..300s&link_type=abstract
Astronomy and Astrophysics, vol. 110, no. 2, June 1982, p. 300-315. U.S.-Israel Binational Science Foundation
Astronomy and Astrophysics
Astrophysics
24
Galactic Evolution, Gas Dynamics, Gas Flow, Intergalactic Media, Astronomical Models, Bremsstrahlung, Conductive Heat Transfer, Inviscid Flow, Momentum Transfer, Viscous Damping
Scientific paper
Gasdynamic calculations are performed numerically for a (spherical) galaxy with gas emission moving through intergalactic gas, with separate calculations made for nonviscous flow and for overestimated transport coefficients. It is found that for nonviscous cases, the rampressure stripping is never complete and Bremsstrahlung cooling induces an instability on a relatively short timescale. Viscous dissipation and heat conduction by the plasma are found to be able to prevent the instability and to cause a steady state in which all the mass produced inside the galaxy is stripped away, irrespective of the flow conditions. Mass-loss occurs mostly by way of the tail. The temperature in the tail is lower than that of the cluster gas. Bow shock is found to be negligible. The rate of stripping is dependent on momentum flow. The form and viscous drag coefficients are of the order of 0.1 and therefore cannot be neglected in cluster evolution. The gravitational drag, however, is extremely small.
Salpeter Edwin E.
Shaviv Giora
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