the Milky Way is a messy eater

Transcript

1. The Milky Way is a messy eater. The Milky Way is a messy eater. Adrian Price-Whelan (Columbia University)
2. The Milky Way
3. The Milky Way Disk
4. The Milky Way Disk Spheroid
6. The Milky Way Disk
7. The Milky Way Disk Spheroid
8. The Milky Way Disk Spheroid You are here
9. The Milky Way Halo
10. Dark Matter
11. Dark Matter F = ma
12. Dark Matter F = ma Force = mass x acceleration
13. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 Gravity
14. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 Gravity Circular motion = M1⇥ v2 r
15. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 e.g. M2 could be the mass of the Sun M1 could be the mass of a planet Gravity Circular motion = M1⇥ v2 r r M1 M2
16. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2
17. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2
18. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2
19. Dark Matter F = ma Force = mass x acceleration GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2 v / r 1 r
20. Dark Matter v / r 1 r v r
21. Dark Matter v / r 1 r Predicted v r
22. Dark Matter v / r 1 r Predicted v r
23. Dark Matter v / r 1 r Predicted v r
24. Dark Matter v / r 1 r Predicted v r Observed
25. Dark Matter v / r 1 r Predicted v r Observed
26. Dark Matter v / r 1 r Predicted Dark Matter! v r Observed
31. We can use the orbits of streams to learn about dark matter!
33. In the neighborhood •What would one of these streams look like from the inside?
34. In the neighborhood •What would one of these streams look like from the inside?
37. Questions?