Modeling a high velocity LMC. The formation of the Magellanic Stream.
Chiara MASTROPIETRO
Obs Paris-Meudon/LERMA
Résumé :
I use high resolution N-body/SPH simulations to model the new proper
motion of the Large Magellanic Cloud (LMC) within the Milky Way (MW) halo
and investigate the effects of gravitational and
hydrodynamical forces on the formation of the
Magellanic Stream (MS).
Both the LMC and the MW are fully self consistent galaxy models
embedded in extended cuspy LCDM dark matter halos.
I find that ram-pressure from a low density ionized halo is sufficient
to remove a large amount of gas from the LMC's disk forming a trailing
Stream that extends more than 120 degrees from the Cloud.
Tidal forces elongate the satellite's disk but do not affect its vertical
structure. No stars become unbound showing that tidal
stripping is almost effectiveless.
