Hierarchical Galaxy formation in the Local Universe
Hierarchical Galaxy formation in the Local Universe Hierarchical Galaxy formation in the Local Universe
Observed SDSS Nbody model Grillmair (2006) reports the discovery of a coherent 60ºlong unknown tidal stream in the Galactic Anticenter. However, we find a excellent agreement with the Monoceros tidal stream Nbody model: the first panoramic view of this outer stellar ring.
RR Lyr clump Anticenter stream ([Fe/H]=1.3) Progenitor position: CMa dwarf [Fe/H]=0.4 A cross of 2 different tails THE MONOCEROS STELLAR RING IS THE TIDAL STREAM OF A SATELLITE IN A PROGRADE CIRCULAR ORBIT. ITS ORIGINAL STELLAR POPULATION IS METALPOOR AND OLDER THAN THE MW DISK. (Peñarrubia, MartínezDelgado, Rix 2007) No metallicity gradient outside R gc =10 kpc: merger are playing an important role in the outer disk formation of the Milky Way. A survival “buildingblock”?
- Page 1 and 2: Hierarchical galaxy formation in th
- Page 3 and 4: At high redshift, we can follow the
- Page 5: Bullock (2003) Outer regions of gal
- Page 9 and 10: Streams resolved in stars. SB~30.5
- Page 11 and 12: MartinezDelgado et al. 2001 AN AL
- Page 13 and 14: Virgo Stellar overdensities in Vi
- Page 15 and 16: q h =0.8 q h =1.4 (l,b) obs ~(290,6
- Page 17 and 18: q h =0.8 (oblate) q h =1.4(prolate)
- Page 19 and 20: The Monoceros tidal stream A giant
- Page 21: A comprehensive model of the Monoce
- Page 26 and 27: • Stellar Tidal Stream: (edgeon
- Page 28 and 29: A river of stars in the M83 halo VI
- Page 30 and 31: THE FORMATION OF THE OUTER EXTENDED
- Page 32: Halo formation z~15 Disk formation
RR Lyr clump<br />
Anticenter stream<br />
([Fe/H]=1.3)<br />
Progenitor position:<br />
CMa dwarf [Fe/H]=0.4<br />
A cross of 2<br />
different tails<br />
THE MONOCEROS STELLAR RING IS THE TIDAL STREAM OF A<br />
SATELLITE IN A PROGRADE CIRCULAR ORBIT. ITS ORIGINAL STELLAR<br />
POPULATION IS METALPOOR AND OLDER THAN THE MW DISK.<br />
(Peñarrubia, MartínezDelgado, Rix 2007)<br />
No metallicity gradient outside R gc<br />
=10 kpc: merger are play<strong>in</strong>g an important<br />
role <strong>in</strong> <strong>the</strong> outer disk <strong>formation</strong> of <strong>the</strong> Milky Way. A survival “build<strong>in</strong>gblock”?
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