Cross-wavelength synergy: VSOP-2 & CTA projects
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Transcript of Cross-wavelength synergy: VSOP-2 & CTA projects
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)
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)。
R~δct
VSOP-2人類史上最高の空間分解能
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
D
Angular Resolution
∝ λ(wavelength)/ D(baseline)
VLA & Chandra era: (2000~)
Comparable angular Resolution ≲ 1 arcsec
VLA (Radio) Chandra (X-ray)
External Shock World
Forward-Shocks & Reverse-Shocks
Centaurus A Cygnus A
Yaji+Kraft+
What we have learned
UNTe/UB~1-100
(e.g., Tashiro+, Croston+, Hardcastle+, Kataoka+ Isobe+,Yaji+)
“invisible” power (thermal e, proton)(e.g., MK+, Birzan+, Ito+ )
Particle dominance for large (≳ 10kpc) jets.
Isobe+08
UNT e
/U B~1
UNT e
/U B~100
UNTe
UB
Long term monitor of blazar motions by VLBA 15 GHz.
MOJAVE (Monitoring Of Jets in AGN with VLBA Experiments) http://www.physics.purdue.edu/~mlister/MOJAVE/index.html
VLBI-Fermi Era: (2008~)VLBA (Radio)MOJAVE survey
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
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。
公募制です。
•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)
Extremely Young Jet: 3C 84
Radio lobe
5 pc
3C84(HALCA)
Perseus Cluster (Chandra X-ray)
Radiocore
jet
GeV/Radio-Core Outburst Abdo+09
EGRET
Fermi
UMRAO
COS-B
Moment of Birth!
C3 is the new-born baby!
C3 flux’s rising!コアを空間分解し、誕生の瞬間を初検
出!
Time (year)
Specifications of VSOP-2
VSOP-2/CTA will see…
Resolution of VSOP-2(22 GHz) reaches ~0.1 pc!
Abdo+09
CTA may detect TeV γ. Variability is a key.
VSOP-2/CTA willoffer a key to solving the origin of γ-ray.
Nagai+ 1 pc
VERA 22 GHz
Towards the central engine: M 87
ここを空間分解
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…
VSOP-2 (43 GHz) willsee this ~ 0.0032pc eye!
Wagner+10
CTA easily detect TeV γ. Variability is a key.
VSOP-2/CTA will show us a hint for the central-engine mechanism.
Walker (NRAO)
0.08pc
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 γ 線放射の起源 に迫る! • M 87 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)
22 GHz(VERA)
Ang. Resolution
∝ λ(wavelength)/D(baseline) D
Science Goals
Central enginemechanism
Origin of gamma-ray
Origin of cosmic-ray
Gamma-bright jet
Gamma-dim jet
Accretion flow