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
Jets From Young Stars
Search
transientskp
June 18, 2012
Science
1
140
Jets From Young Stars
Jochen Eislöffel
LOFAR and the Transient Radio Sky, Amsterdam, December 2008
transientskp
June 18, 2012
Tweet
Share
More Decks by transientskp
See All by transientskp
Sourcefinding Strategy in MSSS, the first LOFAR survey
transientskp
0
120
A Modified Flagger for Transient Radio Signals
transientskp
0
150
Transient Detection and SQL
transientskp
0
210
The Trap: Now & Next
transientskp
0
110
Transients Database Performance
transientskp
0
170
Training the Trap
transientskp
1
140
AARTFAAC Status Update
transientskp
0
140
LOFAR + Gaia (+ X-ray) Transients
transientskp
0
210
Heterogeneous Telescope Networks
transientskp
0
140
Other Decks in Science
See All in Science
データマイニング - ノードの中心性
trycycle
PRO
0
270
Quelles valorisations des logiciels vers le monde socio-économique dans un contexte de Science Ouverte ?
bluehats
1
490
機械学習 - SVM
trycycle
PRO
1
880
オンプレミス環境にKubernetesを構築する
koukimiura
0
340
Cross-Media Technologies, Information Science and Human-Information Interaction
signer
PRO
3
31k
生成検索エンジン最適化に関する研究の紹介
ynakano
2
1.3k
深層学習を用いた根菜類の個数カウントによる収量推定法の開発
kentaitakura
0
180
ランサムウェア対策にも考慮したVMware、Hyper-V、Azure、AWS間のリアルタイムレプリケーション「Zerto」を徹底解説
climbteam
0
110
AI(人工知能)の過去・現在・未来 —AIは人間を超えるのか—
tagtag
1
120
サイゼミ用因果推論
lw
1
7.5k
傾向スコアによる効果検証 / Propensity Score Analysis and Causal Effect Estimation
ikuma_w
0
130
テンソル分解による糖尿病の組織特異的遺伝子発現の統合解析を用いた関連疾患の予測
tagtag
2
240
Featured
See All Featured
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
32
1.5k
Agile that works and the tools we love
rasmusluckow
330
21k
GitHub's CSS Performance
jonrohan
1032
460k
A better future with KSS
kneath
239
17k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.9k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.4k
Why Our Code Smells
bkeepers
PRO
339
57k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
Optimising Largest Contentful Paint
csswizardry
37
3.4k
Documentation Writing (for coders)
carmenintech
74
5k
Balancing Empowerment & Direction
lara
3
620
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
18
1.1k
Transcript
TLS Tautenburg – 12. Dec 2008
TLS Tautenburg – 12. Dec 2008
Jets From Young Stars Jochen Eislöffel Thüringer Landessternwarte Tautenburg
Accretion/ejection: from AGN central engines to brown dwarfs operates over
ten orders of magnitude of mass of central object!
Formation and collimation of a jet by rotating magnetosphere
Disks and Jets of Young Stars
Understanding the central engine Blandford & Payne 1982 Camenzind 1990
Wardle & Königl 1993 Ferreira & Pelletier 1993, 1995 Casse & Ferreira 2000a,b Disk winds X-winds Stellar winds Parker 1958 Weber & Davis 1967 Hartmann & McGregor 1982 Lago 1984 Sauty & Tsinganos 1994, 2000 Shu et al. 1994 Shang et al. 2002 Lovelace et al. 1995,1999 Fendt & Elstner 2000
Evolutionary scheme of star formation Jet adapted from Feigelson &
Montmerle, ARA&A, 1999
Formation and collimation of a jet by rotating magnetosphere
Jet rotation: DG Tau S2 S6 0."4 ~ 90 AU
~30 AU
An HST survey for jet rotation radial velocity asymmetries: 10-30
km/s Coffey et al. 2004, 2007
Properties of the accretion/ejection structure foot point radius ~ 0.1
– 3 AU BN/Bp ~ 4 – 8 Angular momentum extracted from disk: 60 - 100% Bacciotti et al. 2002, Anderson et al. 2003, Coffey et al. 2004, Pesenti et al. 2004, Woitas et al. 2005
Non-thermal radio jets Curiel et al. 1993 Ray et al.
1997
DG Tau X-ray jet 0.6-1.7 keV ACIS-S: DG Tau +
jets Smoothed Colour-coded Guedel et al. 2008
L1551 IRS5 X-ray jet L1551 IRS5 PSF source 2005 Chandra
2001 Favata et al. 2006
L1551 IRS5 X-ray and optical jet Bonito et al. 2008
L1551 IRS5 jet - motion Bonito et al. 2008
Correlation between accretion and mass outflow accretion rate from veiling
mass outflow rate from HVC ejection efficiency: Mwind/Macc ~ 1% Hartigan, Edwards, Ghandour 1995
Optical variability of S CrA Forbrich et al. 2008
cm- variability in the LkHa101 cluster Osten and Wolk 2008