Presentation is loading. Please wait.

Presentation is loading. Please wait.

Radio Signatures of Coronal Magnetic Fields and Reconnections

Similar presentations


Presentation on theme: "Radio Signatures of Coronal Magnetic Fields and Reconnections"— Presentation transcript:

1 Radio Signatures of Coronal Magnetic Fields and Reconnections
Guang-Li Huang Purple Mountain Observatory Nanjing, P. R. China Nobeyama Symposium, 2004

2 Key problems of solar observations in comparison with models (Forbs, 2004)
Measurement of coronal magnetic fields - Radio diagnosis as one possibility Measurement of exact time and location of magnetic reconnections – Radio Fine Structures as the signatures of magnetic reconnections Scientific objectives of radio telescopes in near future (FASR and etc.) Nobeyama Symposium, 2004

3 Diagnosis of magnetic fields under Dulk & Marsh’s approximations (Huang, 2000)
Nobeyama Symposium, 2004

4 Calculation of propagation angles with polarization degree (Huang et al., 2002)
Nobeyama Symposium, 2004

5 2-D magnetic field with Nobeyama data (Huang et al., 2002)
Nobeyama Symposium, 2004

6 Calculation of propagation angles with turnover frequency (Huang et al
Nobeyama Symposium, 2004

7 General calculations (Huang, 2004)
Nobeyama Symposium, 2004

8 Calculation with Ramaty and Takakura’s model (Huang et al., 2004)
Nobeyama Symposium, 2004

9 Effects of low energy cutoffs (Huang et al., 2004)
Nobeyama Symposium, 2004

10 Effects of magnetic fields (Huang et al., 2004)
Nobeyama Symposium, 2004

11 Effects of other parameters (Huang et al., 2004)
Nobeyama Symposium, 2004

12 Calculations of nonthermal density (Zhou et al., 2004)
Nobeyama Symposium, 2004

13 Millisecond radio spikes on Nov 2, 1997 (Huang, 2004)
Nobeyama Symposium, 2004

14 17 GHz contours overlaid on SXT and MDI (Huang, 2004)
Nobeyama Symposium, 2004

15 Location of the spike source (Huang, 2004)
Nobeyama Symposium, 2004

16 Radio fine structures - precursors - on Aug 25, 1999 (Huang et al
Nobeyama Symposium, 2004

17 17/34 GHz contours overlaid on SXT (Huang et al., 2003)
Nobeyama Symposium, 2004

18 Location of reconnections – ropes (Huang et al., 2003)
Nobeyama Symposium, 2004

19 New-classical effects in this event (Tan & Huang, 2004)
Nobeyama Symposium, 2004

20 Radio ejection accompanied with CME on April 21, 2002 (Huang, 2004)
Nobeyama Symposium, 2004

21 Together with moving type IV (Huang, 2004)
Nobeyama Symposium, 2004

22 Three drift rates – current sheet, shock, and acceleration (Huang, 2004)
Nobeyama Symposium, 2004

23 Evidence of Nobeyama data with CME on Oct 26, 2003 (Ning et al., 2004)
Nobeyama Symposium, 2004

24 Some other works of Chinese solar radio people using Nobeyama data
Polarization analysis with NoRH images (Su & Huang, 2004) Spectral index with NoRH and RHESSI (Su & Huang, 2004) Complexity of NoRH sources with CMEs (Shao et al., 2004, in process) Statistics of flare list of NoRH (Tan et al., 2004, in process) Nobeyama Symposium, 2004

25 Summary Nobeyama data are necessary for radio diagnosis of magnetic fields and reconnections in low corona Chinese solar radio people pay much attention to Nobeyama data due to the same time schedule of observations in China and Japan Acknowledgement Nobeyama Symposium, 2004


Download ppt "Radio Signatures of Coronal Magnetic Fields and Reconnections"

Similar presentations


Ads by Google