Ring Galaxies: The Dynamical Effect of the Halo and the Role of Shear Viscosity and Pressure Gradient Forces

Details Ring Galaxies: The Dynamical Effect of the Halo and the Role of Shear Viscosity and Pressure Gradient Forces Ring Galaxies: The Dynamical Effect of the Halo and the Role of Shear Viscosity and Pressure Gradient Forces

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ap%26ss.306...99c&link_type=abstract

Astrophysics and Space Science, Volume 306, Issue 3, pp.99-112

Astronomy and Astrophysics

Astrophysics

Dark Matter Haloes, Galaxies Evoluion, Galaxies Kinematics And Dynamics, Spiral Structure

Scientific paper

The peculiar ring galaxies are formed as a result of a cosmic interaction. An intruder galaxy plunges through the center of a rotating disk galaxy triggering radially expanding density waves inside the disk. In this paper we exploited SPH simulations with the aim to examine the role of a “live” halo and/or bulge in driving the morphology of the interacting galaxy. Moreover we explore the effects of different implementations of the shear viscosity and of the pressure gradient in the code.

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