A Study of Magnetic Field by Using Core Shift for Radio Galaxy 3C - PowerPoint PPT Presentation

Jul 05, 2023 •135 likes •412 views

A Study of Magnetic Field by Using Core Shift for Radio Galaxy 3C 111 K.Shiotani , K.Fujisawa, K.Niinuma (Yamaguchi univ.) Introduction AGN Jets SMBH Lobe Relativistic jet (~10) Cygnus A radio image for VLA(Image courtesy of NRAO) A

A Study of Magnetic Field by Using Core Shift for Radio Galaxy 3C 111 K.Shiotani , K.Fujisawa, K.Niinuma (Yamaguchi univ.)
Introduction
AGN Jets SMBH Lobe Relativistic jet (Γ~10) Cygnus A radio image for VLA(Image courtesy of NRAO) A lot of issues has not been clarified a few kpc ~ Mpc How collimate? How accelerate? ∼ 10 40 • Powerful energy emission ( erg/s) from very compact region • Radio to γ-ray emission ; Synchrotron + Inverse Compton • Collimated plasma flow with relativistic velocity
Magnetically Driven Model ⇨magnetically driven model is a most likely model J.McKinney 2006 Important to estimate the magnetic field strength of the jet of pc or less scale for more realistic simulation 宇宙ジェットの磁気駆動モデルのコンピュータシミュレーション • Helical magnetic field・Synchrotron radiation・high speed jet (http://home.hiroshima-u.ac.jp/hasc/news/3c279/index.html , Shibata and Uchida 1986)
Motivation Estimating physical parameters (especially the magnetic field) at the pc scale from the observation, constraining the theoretical model Magnetic field can not be measured directly . . . “ Core shift ” gives us indirect measurement of magnetic field
Method & Target

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