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AR NOAA 10798 & 10808 (August-September, 2005)

AR NOAA 10798 & 10808 (August-September, 2005). Ayumi Asai Nobeyama Solar Radio Observatory, NAOJ December 11, 2005 CAWSES WS @Stanford. Nobeyama Solar Radio Observatory. Nobeyama Radioheliograph. Nobeyama Radio Polarimeter. Evolution NOAA 10798. emergence!. SOHO/MDI Face-on movie.

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AR NOAA 10798 & 10808 (August-September, 2005)

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  1. AR NOAA 10798 & 10808(August-September, 2005) Ayumi Asai Nobeyama Solar Radio Observatory, NAOJ December 11, 2005 CAWSES WS @Stanford

  2. Nobeyama Solar Radio Observatory Nobeyama Radioheliograph Nobeyama Radio Polarimeter

  3. Evolution NOAA 10798 emergence! SOHO/MDI Face-on movie

  4. GOES light curve (NOAA10798) • 3 M-class flares occurred

  5. Coronal Features of NOAA 10798 • SOHO/EIT (195A) NOAA 10798 10797 CH New AR appears in a small coronal hole

  6. SOHO/EIT (195A) Coronal Features of NOAA 10798 NOAA 10798 CH Anemone structure!

  7. Anemone Structure • Anemone structure – ARs which appear in CHs (not so active) • Source of gigantic jets

  8. near the west limb (S11 W62) M-class flares LDE ejection  Halo-CME Flare1: 2005/08/22 00:44UT SOHO/EIT (195) movie

  9. Halo-CMEs NOAA 10798 is located near the southwest limb 08/22 (M2.6) 01h 08/22 (M5.6) 17h wide CME magnetic configuration (CH)? CMEs of NOAA 10798 SOHO/LASCO C3

  10. Summary of NOAA 10798 • Characteristics of the AR NOAA10798 which is the AR of NOAA 10808 in the previous rotation • rapidly evolved (especially in the second half of the path) • showed anemone-type structure (appeared in a small CH) • M-class flare occurred near the southwest limb • Nevertheless, generated a halo-type CME wide angle CME magnetic configuration? (CH?)

  11. Backside CME! Short Break • Backside Halo-CME (AR is evolving!) 2005-Aug-31 LASCO/C2 SOHO/EIT (195)

  12. Evolution NOAA 10808 SOHO/MDI Face-on movie

  13. Evolution of AR GOES/SXI

  14. GOES light curve (NOAA10808) • 10 X-class, 20 M-class flares occurred

  15. 2005/09/07 17:17UT (X17.0) 2005/09/08 20:52UT (X5.4) Huge flares (X17, X5.4) No EIT, No MDI, No LASCO TRACE movie shows ejection Phase 1: poor observation

  16. Phase 2: geo-effective flare • 2005/09/09 09:42UT (X3.6) • 2005/09/09 19:13UT (X6.2)

  17. AR was located near the limb Halo-CMEs CMEs of 2005-Sep-09 Flare SOHO/LASCO C2 SOHO/LASCO C3

  18. Phase 3: LDE flares • 2005/09/10 21:30UT (X2.1) • 2005/09/11 12:44UT (M3.0)

  19. Site of Flares (LDEs) 100 arcsec TRACE (171) SOHO/MDI

  20. Site of Flares (LDEs) 100 arcsec TRACE (171) SOHO/MDI

  21. Phase 4: more LDE flares • 2005/09/13 19:19UT (X1.5) • 2005/09/13 23:30UT (X1.7) near disc center

  22. Site of Flares 100 arcsec

  23. Phase 4: Impulsive flares • 2005/09/13 19:19UT (X1.5) • 2005/09/13 23:30UT (X1.7) on the d-umbra compact region No-CMEs!

  24. Summary of NOAA 10808 • showed complex structure (d-type sunspots) • rapidly decay (in the second half of the path) • flare-productive AR (10 X-class, 20 M-class flares) • both of LDE flares and impulsive flares occurred • sites are different • Halo-CMEs were associated with LDEs (even X-class flares were not necessarily associated with CMEs) • wide angle ejections/CMEs even limb flares generated Halo-CMEs

  25. Questions • Why are Halo-type CMEs generated even from near-limb flares? Ejections are easily expanded? • Homologous flares, but some of them are geo-effective (and others are no geo-effective)? • Are big flares associated with big magnetic storms?

  26. Flares ofNOAA 10798 Characteristics • AR is located near the southwest limb • But, generated Halo-CMEs ejection が広がりやすい磁場構造!?

  27. Confined Flares

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