Ring Galaxies: The Dynamical Effect of the Halo and the Role of Shear Viscosity and Pressure Gradient Forces |
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| Authors: | Anna Curir |
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| Institution: | (1) INAF, Osservatorio Astronomico di Torino, Strada Osservatorio 20, 10025 Pino Torinese, Torino, Italy |
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| Abstract: | 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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| Keywords: | Dark Matter haloes Galaxies evoluion Galaxies kinematics and dynamics Spiral structure |
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