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
Rotation Measures for Globular Cluster Pulsars ...
Search
Anna Ho
October 12, 2017
Science
0
78
Rotation Measures for Globular Cluster Pulsars at a Unique Probe of the Galactic Magnetic Field
as presented at galaxy coffee at the MPIA on 9 October 2014
Anna Ho
October 12, 2017
Tweet
Share
More Decks by Anna Ho
See All by Anna Ho
SN2018gep: The Death Throes of a Stripped Massive Star
annayqho
0
160
Diverse phenomena arise from a single engine: a history lesson from AGN unification
annayqho
0
330
AT2018cow: the poster-child explosion for high-frequency time-domain astronomy
annayqho
0
230
Cosmic Detectives: Investigating the Catastrophic Deaths of Stars
annayqho
0
88
The rotation rates of massive stars: the role of binary interaction
annayqho
0
68
Towards a complete redshift catalog for galaxies in the Local Universe
annayqho
0
84
Dirty Fireballs and Orphan Afterglows: A Broader Landscape of Stellar Death
annayqho
1
290
Towards a framework for space traffic control
annayqho
0
100
A tale of 115 photons: a new, faint population of X-ray transients
annayqho
0
120
Other Decks in Science
See All in Science
HajimetenoLT vol.17
hashimoto_kei
1
160
データベース09: 実体関連モデル上の一貫性制約
trycycle
PRO
0
1.1k
コミュニティサイエンスの実践@日本認知科学会2025
hayataka88
0
110
データマイニング - ノードの中心性
trycycle
PRO
0
320
凸最適化からDC最適化まで
santana_hammer
1
350
動的トリートメント・レジームを推定するDynTxRegimeパッケージ
saltcooky12
0
240
Celebrate UTIG: Staff and Student Awards 2025
utig
0
410
機械学習 - SVM
trycycle
PRO
1
960
データベース03: 関係データモデル
trycycle
PRO
1
330
【論文紹介】Is CLIP ideal? No. Can we fix it?Yes! 第65回 コンピュータビジョン勉強会@関東
shun6211
5
2.2k
[Paper Introduction] From Bytes to Ideas:Language Modeling with Autoregressive U-Nets
haruumiomoto
0
180
データベース10: 拡張実体関連モデル
trycycle
PRO
0
1k
Featured
See All Featured
Game over? The fight for quality and originality in the time of robots
wayneb77
1
74
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
How to make the Groovebox
asonas
2
1.9k
Code Reviewing Like a Champion
maltzj
527
40k
The Impact of AI in SEO - AI Overviews June 2024 Edition
aleyda
5
690
How to build a perfect <img>
jonoalderson
1
4.8k
How GitHub (no longer) Works
holman
316
140k
Reality Check: Gamification 10 Years Later
codingconduct
0
2k
A Modern Web Designer's Workflow
chriscoyier
698
190k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
10
770
Navigating the moral maze — ethical principles for Al-driven product design
skipperchong
1
220
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
35
2.3k
Transcript
Rota%on Measures for Globular Cluster Pulsars as a Unique
Probe of the Galac%c Magne%c Field Anna Ho Fulbright Scholar, MPIA Galaxy Coffee, 9 October 2014
Rota%on Measures for Globular Cluster Pulsars as a Unique
Probe of the Galac%c Magne%c Field 1. Measuring <B> using RotaHon Measures
Rota%on Measures for Globular Cluster Pulsars as a Unique
Probe of the Galac%c Magne%c Field 1. Measuring <B> using RotaHon Measures 2. Why pulsars in globular clusters?
Rota%on Measures for Globular Cluster Pulsars as a Unique
Probe of the Galac%c Magne%c Field 1. Measuring <B> using RotaHon Measures 2. Why pulsars in globular clusters? 3. CalculaHng pulsar rotaHon measures
Rota%on Measures for Globular Cluster Pulsars as a Unique
Probe of the Galac%c Magne%c Field 1. Measuring <B> using RotaHon Measures 2. Why pulsars in globular clusters? 3. CalculaHng pulsar rotaHon measures 4. Results: mapping <B>
Probing <B> with Rota%on Measures Faraday rota%on:
• λ-‐dependent rotaHon
Faraday rota%on: • λ-‐dependent rotaHon
Dispersion: • λ-‐dependent Hme delay Probing <B> with Rota%on Measures
Probing <B> with Rota%on Measures
Why Pulsars in Globular Clusters? Why Pulsars?
• Strong linear polarizaHon • No intrinsic Faraday rotaHon (Noutsos 2012) Why GC Pulsars? • Dense populaHons -‐> probe small-‐scale structure Terzan 5: 35 MSPs • D=5.9 kpc, l = 3.8º, b = 1.7º • 0.01-‐4 pc separaHon • Precise DMs (Ransom 2007)
Calcula%ng RM • 3 years of Green Bank
Telescope observaHons at L-‐band (1.5 GHz) and S-‐band (2 GHz) totaling > 5 days per pulsar • Least squares fit for RM: Ter5C, single phase bin RM0: 175, dRM: 1.51 +/-‐ 0.06 New RM: 176.51 +/-‐ 0.06 X2 = 1.48
Mapping <B>
None
Extra Slide: GC MSP PopulaHons
Extra Slide: GC ContribuHons
Extra Slide: Structure FuncHon