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On coronal streamer changes. N. Goplasmwamy, M. Shimojo, W. Lu, S. Yashiro, K. Shibasaki, R.A. Howard Advances In Space Research 2004, 33 , 676-680. 2004 年 6 月 14 日 太陽雑誌会 速報 (森本) プロミネンス爆発ゼミ. How ?. NoRH & SOHO observations on streamer changes with prominence eruptions. - PowerPoint PPT Presentation
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On coronal streamer changes
N. Goplasmwamy, M. Shimojo, W. Lu, S. Yashiro, K. Shibasaki, R.A. Howard
Advances In Space Research2004, 33, 676-680
2004年 6月 14日 太陽雑誌会 速報 (森本) プロミネンス爆発ゼミ
Abstract
Coronal streamer represents one of the pre-eruption configuration of CMEs. … Characteristics of the streamer-related events.
Motivation :
Streamer-related events are closer to those of prominence eruptions with transverse trajectories.
Main result :
NoRH & SOHO observations on streamer changes with prominence eruptions.
Illustrative examplesstreamer-related VS. general prominence events.
How ?
Introduction
Streamer events : Streamer activities (which show rise motions) with microwave prominence activations or eruptions.
These events do not include CMEs.
Illustrative examples11 events.
Date P-angle Speed Max. Height
SubsequentCME (Time)
34.3 km/s
-12.8 km/s
1.32 Rs
1.09 Rs
NoRH daily mpeg : 1996-2001Overlapped with SOHO LASCO Lacked white-light CMEsStreamer changes were found
226 prominence eruptions186 5211
2000 Jan 18
NoRH (17/23:11 – 18/06:11 UT)
SOHO LASCO18th all day
2000 Jan 18 NoRH
1. Mainly transversal motion (radial speed = 5.2 km/s)
2000 Jan 18 Pic du Midi
2. H prominence eruption
2000 Jan 18 LASCO
1. Slow Swelling during NoRH Observation (11 hours)
2. Eruption as a CME(CME speed = 143 km/s within C2 FOV)
The streamer changes (corresponding to prominence activation or small scale eruption) is slow swelling.
1998 Jun 01
NoRH (31/22:46 – 01/06:36 UT)
SOHO LASCO(01th all day)
1998 Jun 01 NoRH & LASCO
Slow rise (~ 8km/s) Continuous slow swelling from 01th 01:30 UTCME (onset = 02th 08:08 UT)
1998 Jan 01 EIT
Northern part showed a “failed eruption” (05:00 – 06:56 UT).In emission = heated?
The whole NoRH prominence is seen in absorption
199 Jan 01 EIT & NoRH
Overlay of the 17GHz contours on an EIT difference image.
EIT ejecta (denoted by the arrow) reached as high as the leading edge of the microwave prominence.
Summary
Transverse events : transversal motion is dominant.Radial event : radial motion is dominant
Transversal motion (prominence activation) is the dominant for the majority of streamer-related events.