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...
![Page 1: Line Profile Characteristics of Solar Explosive Event Bursts Z. Ning et al 2004 A&A 419,1141 Speaker: Jinping Dun.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf831a28abf838c867d0/html5/thumbnails/1.jpg)
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
![Page 2: Line Profile Characteristics of Solar Explosive Event Bursts Z. Ning et al 2004 A&A 419,1141 Speaker: Jinping Dun.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf831a28abf838c867d0/html5/thumbnails/2.jpg)
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
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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
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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
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3.3. Examples and Results (i)Examples and Results (i)
Time Variation of Integrated Intensity
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3.3. Examples and Results (ii)Examples and Results (ii) Repetition of Explosive Events
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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)
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3.3. Examples and Results (iv)Examples and Results (iv) The Magnetic Field
Emergence (white) and Cancellation (black)
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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.
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Thank YouThank You !!
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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
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Profile of Explosive Event Profile of Explosive Event (ii)(ii)
Ni 1393.33Ni 1393.33
SiIV 1393.78SiIV 1393.78
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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)