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OATS-DAUT SEMINAR
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Speaker:
Chiara Mastropietro (USM, Munich)
Title:
Ram-pressure versus tides: when gravity is only part of the story
Date: Wednesday, February 20th, 2008
Time: 12:00
Venue: Villa Bazzoni
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Abstract:
How does the combined effect of gravitational and hydrodynamical forces
affect the evolution of a substructure orbiting in a dense environment?
The well known ''Bullet Cluster'' (1E0657-56) probably represents the most
extreme case where the behavior of the collision dominated hot gas is clearly
distinguishable from the collisionless stellar and dark matter components.
On a completely different ram-pressure regime, the gaseous Magellanic
Stream, which stretches for over 100 degrees in the Southern Sky, is the most
prominent signature of an ongoing interaction between the hot halo of the
Milky Way and the Large Magellanic Cloud. Could ram-pressure stripping from a
tenuous Galactic halo be also advocated to explain the lack of gas observed in
many dwarf spheroidal galaxies in the Local Group?
I will present the results of high resolution N-body/SPH simulations where
the morphological and kinematical evolution of the substructures is modeled in
details.
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contact: Andrea Biviano (OATS)