Location: ISS >> Research Teams

Group of Solar Eruptions


General Introduction 

(More information: http://space.wh.sdu.edu.cn)

Solar eruptions, including coronal mass ejections (CMEs) and solar flares, are spectacular eruptive phenomena occurring in the solar atmosphere. They represent the strongest energy release process in the solar system, with sometimes catastrophic impact on the geo-space environment. Despite intensive investigations over past decades, the exact physical process initiating and driving the eruption remains not resolved.

 

During solar eruptions, a significant amount of magnetic energy is transformed into kinetic energy of energetic particles. It remains elusive regarding how particles are accelerated during solar eruptions (through shock or reconnection related processes). The energetic particles, especially the electrons, can excite various types of electro-magnetic emission enhancement through a number of different emitting mechanisms. Of particular interests are the radio bursts at the metric and centimeter (microwave) wavelengths, as well as the hard-X-ray and soft-X-ray emissions. They are important since they carry important information about the background coronal media and the energetic particles.

 

The group explores various aspects of solar eruptions, including the initiation and eruptive mechanisms of CMEs/flares, particle acceleration via shocks and magnetic reconnections, as well as critical issues relevant to solar radio bursts and x-ray emissions. We are also developing state-of-the-art instruments observing the sun via radio wavelengths.


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The solar radio spectrograph built and operated by us at ChaShan, working at 150-500 MHz with a very high spectral and temporal resolution. The antenna array working from 30-180 MHz is still under construction.


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GROUP PHOTOS (with collaborators Gang Li, Qiang Hu, and Suli Ma, without the presence of Artem Koval & Vasanth V)

 

Principal Investigator

Prof. Dr. Yao Chen (http://space.wh.sdu.edu.cn/bencandy.php?fid=36&aid=555)

 

Team Members (1 full professor, 4 associate professors, 1 associate researcher, 2 technician, 4 postdocs, and 7 graduate students)

(visit http://space.wh.sdu.edu.cn/bencandy.php?fid=19&id=507 for more info.)

Full Professor: Dr. Hongqiang Song

Associate Professor:

   Dr. Chaoling Tang, Dr. Maoshui Lv, Dr. Guiping Ruan, Mr. Qingfu Du

Associate Researcher: Dr. Ruisheng Zheng

Lecturer: Miss Junrui Zhang

Technician: Dr. Shiwei Feng, Mr. Zhao Wu (also a phd student)

Postdoctoral Scientists:

   Vasanth V., Artem Koval, Chunlin Tian, Xiangliang Kong

Graduate students:

   Guohui Du, Zhao Wu, Bing Wang, Guang Lu, Chuanyang Li, Di Zhao, Hao Ning

 

Main Research Grants

1. Roles of streamers in coronal shock acceleration of energetic electrons in the corona, NSFC, general project, Yuan 800,000, 2013.1-2017.12.

2. Solar eruptions, shocks, electron acceleration and solar radio bursts, NSFC, key project, Yuan 2850,000, 2014.1-2018.12.

3. Effects of coronal magnetic structures on shock-electron acceleration and type II solar radio bursts, NSFC grant for youths, Yuan 220,000, 2016.1-2018.12.

4. Imaging study of type II solar radio bursts, NSFC, general joint project in astronomy, 480,000, 2015.1-2017.12.

5. Evolution of magnetic field and relevant eruptive events in solar active regions, NSFC, general joint project in astronomy, Yuan 540,000, 2014.1-2016.12.

6. Streamer classification and observations of corresponding plasma sheet-solar wind plasmas, Yuan 800,000, 2014.1-2016.12.

 

Selected Publications in 2015-2016

1. Dynamics of a prominence-horn structure during its evaporation in the solar corona, Bing Wang, Yao Chen, Jie Fu, Bo Li, Xing Li, and Wei Liu, ApJL, 2016, in press.

2. Xiangliang Kong, Yao Chen, Shiwei Feng, Guohui Du, Chuanyang Li, Artem Koval, V. Vasanth, Bing Wang, Fan Guo, and Gang Li, Observation of a metric type N solar radio burst, ApJ, 2016, in press.

3. Shiwei Feng, Yao Chen, Hongqiang Song, Bing Wang, and Xiangliang Kong, An imaging study of a complex solar coronal radio eruption, ApJ, 827, L9, 2016

4. A.A. Koval, A.A. Stanislavsky, Y. Chen, S. W. Feng, A.A. Konovalenko, and Ya.S. Volvach, DECAMETER STATIONARY TYPE IV BURST IN IMAGING OBSERVATIONS ON THE 6TH OF SEPTEMBER 2014, ApJ, 826:125, 2016.

5. Chunlin Tian, Yao Chen, Numerical simulations of Kelvin-Helmholtz instability: a two-dimensional parametric study, The Astrophysical Journal, 824:60 (10pp), 2016.

6. Ruisheng Zheng, Yao Chen, and Bing Wang, Slipping Magnetic Reconnections with Multiple Flare Ribbons during an X-class Solar Flare, 823, 136, ApJ, 2016.

7. H.Q. Song, Z. Zhong, Y. Chen, J. Zhang, X. Cheng, L. Zhao, Q. Hu, and G. Li., A Statistical Study of the Average Iron Charge State Distributions inside Magnetic Clouds for Solar Cycle 23, The Astrophysical Journal Supplement Series, 224 (2), article id. 27, 2016.

8. Yao Chen, Guohui Du, Di Zhao, Zhao Wu, Wei Liu, Bing Wang, Shiwei Feng, and Hongqiang Song, IMAGING A MAGNETIC-BREAKOUT SOLAR ERUPTION, The Astrophysical Journal Letters, 820:L37 (8pp), 2016.

9. Zhao Wu, Yao Chen, Guangli Huang, Hiroshi Nakajima, Hongqiang Song, Victor Melnikov, Wei Liu, Gang Li, Kalugodu Chandrashekhar, and Fangran Jiao, MICROWAVE IMAGING OF A HOT FLUX ROPE STRUCTURE DURING THE PRE-IMPULSIVE STAGE OF AN ERUPTIVE M7.7 SOLAR FLARE, The Astrophysical Journal Letters, 820:L29 (7pp), 2016

10. Xiangliang Kong, Yao Chen, Fan Guo, Shiwei Feng, Guohui Du, and Gang Li, Electron Acceleration at a Coronal Shock Propagating Through a Large-scale Streamer-like Magnetic Field, The Astrophysical Journal, 821:32 (12pp), 2016.

11. Xiangliang Kong, Yao Chen, and Fan Guo, The acceleration of electrons at a spherical coronal shock in a streamer-like coronal field, AIP Conference Proceedings 1720, 070003 (2016); doi: 10.1063/1.4943840.

12. Ruisheng Zheng, Yao Chen, Guohui Du, and Chuanyang Li, Solar jet-coronal hole collision and a closely related coronal mass ejection, 819:L18 (7pp), 2016.

13. Jia Huang, Yong C.-M. Liu, Berndt Klecker, Yao Chen, Coincidence of Heliospheric Current Sheet and Stream Interface: Implications for the Origin and Evolution of the Solar Wind, Journal of Geophysical Research: Space Physics, Volume 121, Issue 1, pp. 19-29, 2016.

14. Lulu Zhao, Gang Li, R. W. Ebert, M. A. Dayeh, M. I. Desai, G. M. Mason, Z. Wu, Y. Chen, Modeling transport of energetic particles in corotating interaction regions: A case study, Journal of Geophysical Research: Space Physics, Volume 121, Issue 1, pp.77-92, 2016.

15. Ruan Guiping, Yao Chen, Haiming Wang, Long-term preflare penumbral decay and photospheric transverse field decline and their relation with filament-corona dynamics, ApJ, 2015.

16. Guohui Du, Xiangliang Kong, Yao Chen, Shiwei Feng, Bing Wang, and Gang Li, An observational revisit of band-split solar type-II radio bursts, ApJ, 2015.

17. Wang Hao, Du Qingfu*, Song Yong, and Chen Yao, The Modeling and Simulations of Low Noise Floor Solar Radio Receiver, The Open Automation and Control Systems Journal, 2015, 7, 1030-1033.

18. Hongqiang SONG, Yao CHEN, Jie ZHANG, Xin CHENG, Bing Wang, Qiang HU, Gang LI, and Yuming WANG, Evidence of the solar EUV hot channel as a magnetic flux rope from remote-sensing and in situ observations, ApJL, 2015.

19. Hongqiang Song, Yao Chen, Jie Zhang, Xin Cheng, H. Fu, and Gang Li, ACCELERATION PHASES OF A SOLAR FILAMENT DURING ITS ERUPTION, ApJ, 804:L38 (5pp), 2015 May 10.

20. H. Q. Song, J. Zhang, Y. Chen, X. Cheng, G. Li, and Y. M. Wang, First taste of a hot channel in interplanetary space, ApJL, 2015, 803:96, doi:10.1088/0004-637X/803/2/96.

21. V. Vasanth, Yao Chen, Xiangliang Kong, and Bing Wang, Investigation on Geoeffectiveness of CMEs associated with IP type-II Radio Bursts, Solar Physics, 2015, DOI 10.1007/s11207-015-0713-0.

22. Shiwei Feng, Guohui Du, Yao Chen, Xiangliang Kong, Gang Li, Fan Guo, Simultaneous Radio and EUV Imaging of a Multi-lane Coronal Type II Radio Burst, Solar Physics, 2015, 290:1195-1205, DOI 10.1007/s11207-015-0673-4.

23. Xiangliang Kong, Yao Chen, et al., The Possible Role of Coronal Streamer as Magnetically-closed Structures in Shock-induced Energetic Electrons and Metric Type II Radio Bursts, ApJ, 798:81, 2015, doi:10.1088/0004-637X/798/2/81/.


               


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