Hierarchical Galaxy formation in the Local Universe
Hierarchical Galaxy formation in the Local Universe
Hierarchical Galaxy formation in the Local Universe
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There is an excellent agreement between <strong>the</strong> observations of <strong>the</strong><br />
Monoceros stellar r<strong>in</strong>g and Nbody simulations of tidal<br />
disruption of a dwarf satellite <strong>in</strong> a low <strong>in</strong>cl<strong>in</strong>ated, almost circular<br />
prograde orbit. The stellar population of this stream support <strong>the</strong><br />
extraGalactic orig<strong>in</strong> of this structure, reject<strong>in</strong>g that it is a<br />
Galactic feature.<br />
We provide evidence on <strong>the</strong> presence of <strong>in</strong>fall of <strong>the</strong> Sgr<br />
lead<strong>in</strong>g tail onto <strong>the</strong> Galactic disk. This would expla<strong>in</strong> <strong>the</strong> giant<br />
overdensity discovered <strong>in</strong> Virgo.<br />
The study of tidal streams and extended disks <strong>in</strong> spiral galaxies<br />
<strong>in</strong> <strong>the</strong> <strong>Local</strong> <strong>Universe</strong> will allow to extend this research on <strong>the</strong><br />
<strong>formation</strong> of <strong>the</strong> components of spiral galaxies.
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