Relativistic jets in Active galactic nuclei

Cross-wavelength synergy:
VSOP-2 & CTA projects
M. Kino (NAOJ)
On behalf of VSOP-2 Science Working Group
「高エネルギー宇宙物理学の将来とCTA」2010 Jan 9th,@宇宙線研
Why VSOP-2 & CTA?
M87 (VERITAS, VLBA 43GHz, HESS, MAGIC collaboration 2009)
R~δct
VSOP-2
人類史上最高の空間分解能
提案：
「VSOP-2&CTA 同時観測」を是非やりませんか？
日本主導の「ユニークな科学成果」が期待できる（後述）。
Outline
Looking back the AGN-science history in
terms of “Radio” & “VHE” collaboration.
• 2000 ~ VLA - Chandra Era ~ arcsec world
• 2008 ~ VLBI - Fermi Era ~
mas world
• 201? ~ VSOP-2- CTA
~ 0.1 mas world
Angular Resolution
∝ λ(wavelength)/ D(baseline)
D
VLA & Chandra era: (2000~)
VLA (Radio)
Chandra (X-ray)
Comparable angular Resolution ≲ 1 arcsec
External Shock World
Centaurus A
Cygnus A
Kraft+
Forward-Shocks & Reverse-Shocks
Yaji+
What we have learned
Isobe+08
UNTe/UB~1-100
“invisible” power
(thermal e, proton)
(e.g., MK+, Birzan+, Ito+
UB
(e.g., Tashiro+, Croston+, Hardcastle+,
Kataoka+ Isobe+,Yaji+)
)
UNTe
Particle dominance for large (≳10kpc) jets.
VLBI-Fermi Era: (2008~)
VLBA (Radio)
MOJAVE survey
MOJAVE (Monitoring Of Jets in AGN with VLBA Experiments)
http://www.physics.purdue.edu/~mlister/MOJAVE/index.html
Long term monitor of blazar motions by VLBA 15 GHz.
空間分解した多数イメージに
よって初めて分かる
AGN sky: MOJAVE/Fermi view
MOJAVE/Fermi blazar studies (Lister+, Kovalev+, …).
MOJAVE/Fermi/CTA will lead to statistical studies of blazars.
CTA together with VSOP-2 KSPs?
ひとこと補足: KSP = Key Science Program
公募制です。
VLBI分野以外の多波長、理論の方々
のご参加も大歓迎いたします。
Extremely Young Jet: 3C 84
•Core of perseus cluster
(z=0.0176, i.e., D =77 Mpc)
•Mini radio-lobe 3C 84
t_age = size/ velocity~50 yrs,
size ~5pc (Asada+06)
3C84
(HALCA)
Radio
core
jet
5 pc
Perseus Cluster
(Chandra X-ray)
Radio
lobe
GeV/Radio-Core Outburst
Abdo+09
COS-B
Fermi
EGRET
Moment of Birth!
コアを空間分解し、誕生の瞬間を初検出！
C3 is the new-born baby!
C3 flux’s rising!
Time (year)
Specifications of VSOP-2
VSOP-2/CTA will see…
VERA
22 GHz
Nagai+
1 pc
Resolution of VSOP-2
(22 GHz) reaches ~0.1 pc!
VSOP-2/CTA will
offer a key to solving
the origin of γ-ray.
CTA may detect TeV γ.
Variability is a key.
Abdo+09
Towards the central engine: M 87
2008 flare: VHE/VLBI correlation!
M87 (VERITAS, VLBA 43GHz, HESS, MAGIC collaboration 2009)
76 Rg
本質は空間分解
Time
VSOP-2/CTA will see…
Walker (NRAO)
VSOP-2 (43 GHz) will
see this ~ 0.0032pc eye!
0.08pc
VSOP-2/CTA will show
us a hint for the centralengine mechanism.
CTA easily detect TeV γ.
Variability is a key.
Wagner+10
Summary
VLBIは、1ミリ秒角以下の空間分解能を持つ唯
一無二の装置です。是非CTA & VSOP-2 KSPs
をやりましょう！
• 3C 84
• M 87
γ線放射の起源に迫る！
中心エンジン機構に迫る！
補足資料
VSOP-2/Astro-G
project members
5 GHz vs. 22 GHz
5 GHz
(VSOP)
Ang. Resolution
∝ λ(wavelength)/D(baseline)
22 GHz
(VERA)
D
Science Goals
Gamma-dim jet
Origin of
cosmic-ray
Gamma-bright jet
Accretion flow
Origin of
gamma-ray
Central engine
mechanism

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