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
SMHASH telecon 03/2015
Search
Adrian Price-Whelan
March 11, 2015
Science
0
100
SMHASH telecon 03/2015
Adrian Price-Whelan
March 11, 2015
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
200
The Astropy Project
adrn
1
120
Git and version control
adrn
1
120
Chaos and stellar streams
adrn
1
180
Software testing
adrn
0
200
Local Group Astrostatistics
adrn
1
88
100% Outer Space
adrn
1
160
Caltech 03/2015
adrn
0
170
Other Decks in Science
See All in Science
3次元点群を利用した植物の葉の自動セグメンテーションについて
kentaitakura
2
1.3k
Masseyのレーティングを用いたフォーミュラレースドライバーの実績評価手法の開発 / Development of a Performance Evaluation Method for Formula Race Drivers Using Massey Ratings
konakalab
0
170
データマイニング - ウェブとグラフ
trycycle
PRO
0
110
統計的因果探索: 背景知識とデータにより因果仮説を探索する
sshimizu2006
4
940
SciPyDataJapan 2025
schwalbe10
0
240
学術講演会中央大学学員会府中支部
tagtag
0
280
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14: B+木 & ハッシュ索引
trycycle
PRO
0
340
眼科AIコンテスト2024_特別賞_6位Solution
pon0matsu
0
430
点群ライブラリPDALをGoogleColabにて実行する方法の紹介
kentaitakura
1
320
マウス肝炎ウイルス感染の遺伝子発現へのテンソル分解の適用によるSARS-CoV-2感染関連重要ヒト遺伝子と有効な薬剤の同定
tagtag
0
120
CV_5_3dVision
hachama
0
140
Featured
See All Featured
Into the Great Unknown - MozCon
thekraken
40
1.9k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.6k
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.6k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
53
2.9k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.5k
Designing for Performance
lara
610
69k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
130
19k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
31
1.3k
Side Projects
sachag
455
43k
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
3.9k
Transcript
Rewinder adrian price-whelan
Tidal disruption is simple
t = 0 Price-Whelan et al. (2014) Rewinder
Rewinder Price-Whelan et al. (2014) t = -1 evaluate likelihood
Rewinder Price-Whelan et al. (2014) t = -2 evaluate likelihood
Rewinder Price-Whelan et al. (2014) t = -3
⌧ub K unbinding time leading/trailing tail M mass today any
parametrization per star progenitor potential (l, b, d, µl, µb, vr) (l, b, d, µl, µb, vr) marginalize out WE’RE HOSED Rewinder Price-Whelan et al. (2014)
−100 −50 0 50 X [kpc] −100 −50 0 X
[kpc] x “Data”: Price-Whelan et al. (2014) 8 “RR Lyrae” stars Gaia velocity errors 2% distance errors + Progenitor, same errors
8 RR Lyrae stars Gaia velocity errors 2% distance error
Price-Whelan et al. (2014)
Price-Whelan et al. (2014) 8 RR Lyrae stars 2% distance
errors No proper motions
Price-Whelan et al. (2014) Recover unobserved proper motion for stars
Nparams / 6Nstars Good: Bad: - test particle orbits (no
N-body) - arbitrary potentials - observational uncertainties / missing data - less sensitive to observational biases
Next Marginalize true phase-space positions of the stars Marginal likelihood
has fixed dimensionality set by potential params., progenitor params Price-Whelan et al. (in prep.)