Line Profile Characteristics of Solar Explosive Event Bursts Z. Ning et al 2004 A&A 419,1141...
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Transcript of Line Profile Characteristics of Solar Explosive Event Bursts Z. Ning et al 2004 A&A 419,1141...
Line Profile Characteristics of Line Profile Characteristics of Solar Explosive Event BurstsSolar Explosive Event Bursts
Z. Ning et al 2004 A&A 419,1141
Speaker: Jinping Dun
1. Introduction1. Introduction
Explosive Event is a small-scale, short-lifetime phenomenon in the transition region of quiet Sun.
Main Characteristics
Broaden Line Profile
T ~ 105K ( i.e. SiIV 1393 Å) V~100km/s
Size ~ 2” Lifetime ~ 1min
Physical Model
Plasma Jets Produced by Magnetic Reconnection
2. Observations and Data Reduction (i)2. Observations and Data Reduction (i)
MD
I Magnetogram
The area rastered by SUMER and locations of explosive events
2. Observations and Data Reduction (ii)2. Observations and Data Reduction (ii)
SiIV 1393 Å Spectrum Slit ~ 1” x120”
Step ~ 6
Interval~ 1.13”
Exposure Time ~5s
3.3. Examples and Results (i)Examples and Results (i)
Time Variation of Integrated Intensity
3.3. Examples and Results (ii)Examples and Results (ii) Repetition of Explosive Events
3.3. Examples and Results (iii)Examples and Results (iii)
2D Time Evolution of 5 Groups of Events
The black dashed line boxes surround events with obvious red-blue wing spatial offset.
(Evidence of reconnection jets, Innes et al.,1997, Nature,386,811)
3.3. Examples and Results (iv)Examples and Results (iv) The Magnetic Field
Emergence (white) and Cancellation (black)
4.4. DiscussionDiscussion
2D Structure Evolution of Explosive Events
Repetition of Explosive Events Magnetic reconnection could be triggered by
3~5 min oscillation waves in the chromospheric and transition region.
Thank YouThank You !!
Profile of Explosive Event (i)Profile of Explosive Event (i)
Wavelength
Velocity Along Line-of-sight V=0
V>0(red-shift)V<0(blue-Shift)
Explosive Event
Profile of Explosive Event Profile of Explosive Event (ii)(ii)
Ni 1393.33Ni 1393.33
SiIV 1393.78SiIV 1393.78
three components: stationary and two high-speed (along line-of-sight) sources. (Chae et al.1998,ApJ,497,L109)
stationary component
blue-shift component red-shift components
Profile of Explosive Event (iii)Profile of Explosive Event (iii)