Cooling and the longevity of polar rings

Details Cooling and the longevity of polar rings Cooling and the longevity of polar rings

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...389l..55k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 389, April 20, 1992, p. L55-L58.

Astronomy and Astrophysics

Astrophysics

30

Galactic Evolution, Ionized Gases, Neutral Gases, Polar Orbits, Radiant Cooling, Angular Momentum, Gas Temperature, Hydrodynamic Equations

Scientific paper

It is argued that the rapid evolution of highly inclined polar rings in early-type galaxies is due to both artificial instability caused by the lack of radiative cooling and to the lack of numerical resolution in observations. It is shown that in oblate and near-oblate potentials, highly inclined rings are long-lived and will develop a stable warp, even without self-gravity.

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