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the Milky Way is a messy eater
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Adrian Price-Whelan
April 09, 2013
Science
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the Milky Way is a messy eater
Adrian Price-Whelan
April 09, 2013
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Transcript
The Milky Way is a messy eater. The Milky Way
is a messy eater. Adrian Price-Whelan (Columbia University)
The Milky Way
The Milky Way Disk
The Milky Way Disk Spheroid
None
The Milky Way Disk
The Milky Way Disk Spheroid
The Milky Way Disk Spheroid You are here
The Milky Way Halo
Dark Matter
Dark Matter F = ma
Dark Matter F = ma Force = mass x acceleration
Dark Matter F = ma Force = mass x acceleration
GM1M2 r2 Gravity
Dark Matter F = ma Force = mass x acceleration
GM1M2 r2 Gravity Circular motion = M1⇥ v2 r
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
Dark Matter F = ma Force = mass x acceleration
GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2
Dark Matter F = ma Force = mass x acceleration
GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2
Dark Matter F = ma Force = mass x acceleration
GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2
Dark Matter F = ma Force = mass x acceleration
GM1M2 r2 Gravity Circular motion = M1⇥ v2 r r M1 M2 v / r 1 r
Dark Matter v / r 1 r v r
Dark Matter v / r 1 r Predicted v r
Dark Matter v / r 1 r Predicted v r
Dark Matter v / r 1 r Predicted v r
Dark Matter v / r 1 r Predicted v r
Observed
Dark Matter v / r 1 r Predicted v r
Observed
Dark Matter v / r 1 r Predicted Dark Matter!
v r Observed
None
None
None
None
We can use the orbits of streams to learn about
dark matter!
None
In the neighborhood •What would one of these streams look
like from the inside?
In the neighborhood •What would one of these streams look
like from the inside?
None
None
Questions?