Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
the Milky Way is a messy eater
Search
Adrian Price-Whelan
April 09, 2013
Science
0
75
the Milky Way is a messy eater
Adrian Price-Whelan
April 09, 2013
Tweet
Share
More Decks by Adrian Price-Whelan
See All by Adrian Price-Whelan
the Astropy project - Flatware
adrn
1
230
the dynamic Milky Way in the Gaia era
adrn
1
210
The Astropy Project
adrn
1
120
Git and version control
adrn
1
120
Chaos and stellar streams
adrn
1
180
Software testing
adrn
0
210
Local Group Astrostatistics
adrn
1
89
100% Outer Space
adrn
1
160
SMHASH telecon 03/2015
adrn
0
100
Other Decks in Science
See All in Science
機械学習 - DBSCAN
trycycle
PRO
0
1k
学術講演会中央大学学員会府中支部
tagtag
0
300
データベース11: 正規化(1/2) - 望ましくない関係スキーマ
trycycle
PRO
0
940
モンテカルロDCF法による事業価値の算出(モンテカルロ法とベイズモデリング) / Business Valuation Using Monte Carlo DCF Method (Monte Carlo Simulation and Bayesian Modeling)
ikuma_w
0
250
「美は世界を救う」を心理学で実証したい~クラファンを通じた新しい研究方法
jimpe_hitsuwari
1
160
AIに仕事を奪われる 最初の医師たちへ
ikora128
0
960
ttl2html (RDF/Turtle to HTML)
masao
0
110
点群ライブラリPDALをGoogleColabにて実行する方法の紹介
kentaitakura
1
390
データベース09: 実体関連モデル上の一貫性制約
trycycle
PRO
0
990
白金鉱業Meetup Vol.16_【初学者向け発表】 数理最適化のはじめの一歩 〜身近な問題で学ぶ最適化の面白さ〜
brainpadpr
11
2.3k
データベース08: 実体関連モデルとは?
trycycle
PRO
0
930
研究って何だっけ / What is Research?
ks91
PRO
1
120
Featured
See All Featured
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.7k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
36
2.5k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
920
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.9k
Into the Great Unknown - MozCon
thekraken
40
2k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
12
1.1k
The Invisible Side of Design
smashingmag
301
51k
Product Roadmaps are Hard
iamctodd
PRO
54
11k
Git: the NoSQL Database
bkeepers
PRO
431
66k
A better future with KSS
kneath
239
17k
KATA
mclloyd
32
14k
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?