* Astronomy

Members Login
Post Info TOPIC: Sun 15.03.15


L

Posts: 131274
Date:
RE: Sun 15.03.15
Permalink  
 


Title: Two Step Filament Eruption During 14-15 March 2015
Author: R. Chandra, B. Filippov, R. Joshi, B. Schmieder

We present here an interesting two-step filament eruption during 14-15 March 2015. The filament was located in NOAA AR 12297 and associated with a halo Coronal Mass Ejection (CME). We use observations from the Atmospheric Imaging Assembly (AIA) and Heliospheric Magnetic Imager (HMI) instruments onboard the Solar Dynamics Observatory (SDO), and from the Solar and Heliospheric Observatory (SOHO) Large Angle and Spectrometric Coronagraph (LASCO). We also use H-alpha data from the Global Oscillation Network Group (GONG) telescope and the Kanzelhoehe Solar Observatory. The filament shows a first step eruption on 14 March 2015 and it stops its rise at a projected altitude ~ 125 Mm on the solar disk. It remains at this height for ~ 12 hrs. Finally it eruptes on 15 March 2015 and produced a halo CME. We also find jet activity in the active region during both days, which could help the filament de-stabilization and eruption. The decay index is calculated to understand this two-step eruption. The eruption could be due to the presence of successive instability-stability-instability zones as the filament is rising.

Read more (1538kb, PDF)



__________________


L

Posts: 131274
Date:
Permalink  
 

Photo-mosaic captured with a 100mm f5 Helios refractor and vesta pro webcam. 

Capture 2015-03-15T12_43_23_mosaic4Capture 2015-03-15T12_18_23_mosaic

 

 



__________________


L

Posts: 131274
Date:
Permalink  
 

Capture 2015-03-15T12_21_51Capture 2015-03-15T12_18_23
The eastern limb The western limb with sunspot 12297 

Images captured with a 100mm f5 Helios refractor and vesta pro webcam. Motorised EQ1 Mount and Baader solar filter.

Prime focus.

Hazy sky between broken cloud



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard