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작성일 : 17-09-20 14:00
09월 26일(화요일) 우주과학과 세미나 안내(Dr.Ramesh Chandra)
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안녕하세요우주과학과, 우주탐사학과 여러분.
 
이번 세미나 9 26일 오후 4 30천문대 영상실에서 있습니다.
Department of Physics, Kumaun University의 Dr. Ramesh Chandra께서 "Two-Step Filament Eruptions에 관한 강연을 해 주실 예정입니다.

강연은 영어로 진행되며, 초록은 아래에 나타나있습니다. 세미나 참석을 원하시는 분은 세미나 시작 10분 전까지 입실해 주시기 바랍니다.
많은 참석 부탁드립니다. 감사합니다.
 
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Dear Colleagues,
 
There will be an Astronomy and Space Science seminar on 09/26, 4:30 PM, in the Auditorium, Kyung Hee University Astronomical Observatory.

Dr. Ramesh Chandra of Department of Physics, Kumaun University will give a presentation about "Two-Step Filament eruptions".
 
The language of the seminar will be English and abstract is shown below.
 
You are asked to join the seminar five to ten minutes before it starts. Your attendance will greatly be appreciated.
  
Thank you.



* Abstract:

We present here a filament eruption during 2014 March 14—15. The filament was located in NOAA
AR 12297 and erupted in two steps. 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 Hα data from the Global Oscillation Network
Group (GONG) telescope. 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 erupts on 15 March 2015 and produces a halo CME and the largest geomagnetic storm of
Solar Cycle 24. The decay index is calculated to understand this two-step eruption. The two step
filament eruption was due to the presence of successive instability–stability–instability zones.