1. Constraining the Local Gravitational Potential in the MW by the Motion of Stars
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2. Constraining the Local Gravitational Potential in the MW by the Motion of Stars
Methods:
Vertical distribution of Galactic disk stars (Klement, Fuchs)
Stellar streams in the solar vicinity (Klement, Rix)
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3. The search for local streams
Simulation of the distribution of nearby stream stars in observable-space, phase space and IoM space
Stream formed by the orbital evolution of stars originating from a single progenitor in a fixed MW potential
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4. The search for local streams
Orbit calculations
U0 = -10 km/s
V0 = 70 km/s
W0 = -50 km/s
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5. The search for local streams
Distribution of solar neighbourhood stream stars in velocity space...
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6. The search for local streams
...and in IoM space
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7. The search for local streams
Stream by Arifyanto & Fuchs (2005)
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8. The search for local streams
The RAVE catalog
Field l > 200°, b > 20°
Distance error < 25%
Distance < 500 pc
 7971 stars
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9. The search for local streams
The RAVE catalog
Distance error < 25%
Distance < 500 pc
 stars
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10. Conclusions Find streams through their clustering in velocity space
Constrain the potential through their clustering in IoM space and by tracing the stream further out
Bigger datasets like SEGUE will offer much better chances to find local streams
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