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Modeling a high velocity LMC: The formation of the Magellanic Stream

Published online by Cambridge University Press:  01 July 2008

Chiara Mastropietro
Chiara Mastropietro*
Affiliation:
LERMA, Observatoire de Paris, UPMC, CNRS, 61, A. de l'Observatoire, 75014, Paris, France, email: [email protected] Universitäts Sternwarte München, Scheinerstr.1, D-81679 München, Germany
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Abstract

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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 ΛCDM 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 effectless.

Keywords

methods: n-body simulationsGalaxy: halogalaxies: individual (LMC)galaxies: interactionsgalaxies: kinematics and dynamicsMagellanic Clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S256: The Magellanic System: Stars, Gas, and Galaxies , July 2008 , pp. 117 - 121
Copyright
Copyright © International Astronomical Union 2009

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