1. A Mach Number Behind a Slow Shock (Ahead a Fast
Shock) Surface in a Reconnection Region
Takehiro Miyagoshi & Takaaki Yokoyama
ApJ, 2004, in press.

2. １． ２． Choromosphere Reconnection Outflow Reconnection Region
Emerging
Flux
Reconnection,
Conduction
Choromosphere
Reconnection Outflow
Reconnection Region
Heat Conduction ３．
Choromospheric
Evaporation,
Jet
Evaporation Flow

3. How is a mach number expressed?

4. The slow shocks are regarded as switch-off shocks.
We approximate here the fast shock is a perpendicular
hydrodynamic shock.

5. The Loop Top Temperature and The Sound Speed in the Region 2
The balance between the heating rate
and the conduction cooling rate

6. Magnetic Energy Conversion through Slow Shock Surface
(switch-off limit)
The 60% of released magnetic energy becomes kinetic energy.
(Magnetic Reconnection, pp.133, Priest & Forbes, 2000)

7. Slow Shock --- Large Angle Switch-Off Shock
Jump Condition 2 1
また無視できる項を省略する）

8. The Mach Number
X: density ratio
(slow shock surfce)
For a low-β switch-off
shock

9. A mach number is expressed with only region 1 values.
This equation predicts… Mf~2.1
Numerical simulation results show that…
Shock surface
The location along the red line
versus Mach number Mf
X point

10. Parameter Dependence Numerical simulation results show that… 0.2 0.5
This gives the intensity of the fast shocks. This estimation can also apply to the situation of a loop
top source region of a flare. We expect that our result will be confirmed by the detail observation
of coronal jets and flares by Solar-B.

11. おまけ
t=108
t=126