Configuration of Magnetic Field in Solar Active Regions

1
The horizontal motion of magnetic field and
helicity in a farst emerging flux region 10488

• Jihong Liu and Hongqi Zhang
• National Astronomical Observatories, Chinese
  Academy of Sciences

2
Magnetic helicity injections in corona
Berger (2003) and Demoulin and Berger (2004)
(UtAp)Bz UtVt-VzBt/Bz
Chae (2001) Kosano et al. (2002) Nindos et al.
(2002, 2003)
3
Helicity flows through the photosphere and the
relationship with photospheric magnetic helicity
density
4
Fast emergence of AR 10488 (MDI)
Velocity vector can be inferred by local
correlative tracker technique (November, 1984)
5
Development of magnetic shear and twist in
AR10488 in the photosphere
Horizontal velocity field in the photosphere
6
Development of current helicity density in
AR10488 in the photosphere
Injective rate of magnetic helicity in the
photosphere
7
Injective rate of magnetic helicity into the
corona and mean photospheric current helicity
density in AR10488
8
Accumulation of magnetic helicity from the
subatmosphere in AR10488
Shear emergence
Twist emergence
9
Accumulation of magnetic helicity from the
subatmosphere in AR10488
Shear emergence
Twist emergence
10
Injection rate of magnetic helicity and flares
before the eruption of flare-CME on 2003 Nov 3
11
Emerging magnetic flux in AR10488 provides about
4?1043Mx2 magnetic helicity before the eruption
of flare-CME on 2003 Nov 3
12
Thank you!