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OATS-UNI/TS SEMINAR
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Speaker: Nelson Padilla (Pontificia Universidad Catolica, Santiago, Chile)
Title: Effects of stochasticity of acquisition of angular momentum in the evolution of galaxies
Date: Wednesday, October 9th, 2013
Time: 11:30
Venue: Villa Bazzoni
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Abstract: Dark matter (DM) haloes, the cradles where galaxies form
and evolve, acquire angular momentum in a stochastic way
which results in a final non-zero DM adimensional spin
parameter. We will see how this process translates into
the ability of the galaxy, living in this DM halo,
to form stars. To do this we will first measure this
stochasticity from the Millennium II simulation, and then
see how it affects the properties of the disc of baryons
that forms in the center of a DM halo. We will see that
the smooth infall of matter comes in chunks with almost,
but not quite, random angular momenta, which affects
the ability of a disc to form stars and also the frequency
of instabilities in the disc leading to the formation of bars
and pseudo-bulges, constituting an episodic disc creation.
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Contact: Noelia Jimenez (DAUT)