1. Primordial Origin of Magnetic Fields in the Galaxy & Galaxies - Tight Link between GC and Cosmic B -　 Y. Sofue1, M. Machida2, T. Kudoh3 (1. Kagoshima U. &. U .Tokyo, 2.Nagoya Univ. 3. NAOJ)
Abstract Observations indicate S (BSS, bisymmetric Spiral), A (ASS, axiｓymmetric) , R (Ring) fields in galaxy disks, and V (Vertical) field in the center, which accelerates cosmic jets. The magnetic topology is explained as the fossil of large scale primordial field wound up during the galaxy formation. MHD simulations successfully reproduce the composite field configurations. The vertical fields in the Galactic Center are deeply linked to intergalactic cosmic magnetic fields.
1. Vertical B in GC and Spiral/Ring/Loop Fields in the Disks
NGC 253
Helical B, Loops, Jets, Spicules
NGC 2903,
Helical jets
Galactic Center Vertical B: Helical B, Jets, Loops
M51, M81, M33,
Spiral/Ring + GC V field
2. Primordial origin for S, A, R, & V fields (a,b)
3. MHD Simulation (b) i=0, 45, 89, 90 deg, 10 kpc disk
S (BSS) V
A (ASS)
R (Ring)
R amplification SV
SRV
　ρ＆B2
GC-V field linked to Cosmic B
References: (a) Sofue et al ARAA 24, 459; (b) 2009 PASJ submitted