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
93
0
Share
Embed
Copy iframe code
Copy JS code
Copy link
Start on current slide
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
More Decks by Anna Ho
See All by Anna Ho
SN2018gep: The Death Throes of a Stripped Massive Star
annayqho
0
180
Diverse phenomena arise from a single engine: a history lesson from AGN unification
annayqho
0
360
AT2018cow: the poster-child explosion for high-frequency time-domain astronomy
annayqho
0
240
Cosmic Detectives: Investigating the Catastrophic Deaths of Stars
annayqho
0
100
The rotation rates of massive stars: the role of binary interaction
annayqho
0
83
Towards a complete redshift catalog for galaxies in the Local Universe
annayqho
0
99
Dirty Fireballs and Orphan Afterglows: A Broader Landscape of Stellar Death
annayqho
1
310
Towards a framework for space traffic control
annayqho
0
120
A tale of 115 photons: a new, faint population of X-ray transients
annayqho
0
140
Other Decks in Science
See All in Science
(メタ)科学コミュニケーターからみたAI for Scienceの同床異夢
rmaruy
0
240
不動産業界における業界特化のデータ整備とAI活用 ─Vertical DataとVertical AI─
estie
1
550
KISHIMOTO Atsuo
genomethica
0
150
CVPR2026_VGGTとその仲間たち
mickey_0226
0
800
HDC tutorial
michielstock
2
700
AkarengaLT vol.41
hashimoto_kei
1
140
力学系から見た現代的な機械学習
hanbao
4
4.2k
Van Dare naar Durf
voginip
0
220
Distributional Regression
tackyas
0
540
[NLP2026 参加報告会] AI for Science まとめ / NLP2026
lychee1223
0
1.9k
Kaggle: NeurIPS - Open Polymer Prediction 2025 コンペ 反省会
calpis10000
0
590
20251212_LT忘年会_データサイエンス枠_新川.pdf
shinpsan
0
290
Featured
See All Featured
Practical Orchestrator
shlominoach
191
11k
For a Future-Friendly Web
brad_frost
183
10k
Darren the Foodie - Storyboard
khoart
PRO
3
3.4k
Into the Great Unknown - MozCon
thekraken
41
2.6k
How to build a perfect <img>
jonoalderson
1
5.6k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
49
10k
Site-Speed That Sticks
csswizardry
13
1.2k
Accessibility Awareness
sabderemane
1
140
Stewardship and Sustainability of Urban and Community Forests
pwiseman
0
230
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
35
3.5k
The Director’s Chair: Orchestrating AI for Truly Effective Learning
tmiket
1
190
A brief & incomplete history of UX Design for the World Wide Web: 1989–2019
jct
2
390
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