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THE FORMATION OF FILAMENT CHANNELS K. Muglach, Y.-M. Wang Naval Research Laboratory.

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Presentation on theme: "THE FORMATION OF FILAMENT CHANNELS K. Muglach, Y.-M. Wang Naval Research Laboratory."— Presentation transcript:

1 THE FORMATION OF FILAMENT CHANNELS K. Muglach, Y.-M. Wang Naval Research Laboratory

2 More information on: http ://wwwsolar.nrl.navy.mil/~muglach/ filaments.html

3 Question What mechanism changes magnetic field lines from perpendicular to the polarity inversion line (PIL) to parallel to the PIL? -Large-scale shearing motions parallel to the PIL -Emergence of a flux rope with its axis parallel to the PIL -Flux cancellation at the PIL

4 Database BBSO H alpha images MDI: synoptic magnetograms (96 min) MDI 1 min cadence magnetograms three cases: - 20-23 Jun 2002 - 12-15 Jan 2002 - 04-08 Oct 2002

5 one example: date: 20-23 June 02 region: AR 10003, small decaying bipolar AR location: equator

6 19.Jun.02, AR 10003 MDI full disk magnetogram

7 20-23.Jun.02, AR 10003 AR 10003 20-23.Jun.02 flux= +- 50G +- 7G

8 19.Jun.02, AR 10003 20:00 UT

9 20.Jun.02, AR 10003 19:34 UT

10 21.Jun.02, AR 10003 20:30 UT

11 Cartoon Formation of an arcade of loops by flux cancellation

12 Result What mechanism changes magnetic field lines from perpenticular to the polarity inversion line (PIL) to parallel to the PIL? -Flux cancellation at the PIL

13 13.Jan.02, AR 09778 MDI full disk magnetogram

14 12-14.Jan.02, AR 09778 AR 09778 12-14.Jan.02 flux= +- 50 G

15 12-13.Jan 02 AR 09778 12-13.Jan.02 flux= +- 15 G

16 13.Jan.02, AR 09778 18:54 UT

17 Formation of Jan 02 event

18 4-8.Oct.02 AR 10141 4-8.Oct.02 flux= +- 60/40G +- 6/4G

19 Phot AR 10141 7-9.Oct.02 flux= +- 10 G

20 AR 10141 5/6.Oct.02 flux= +- 9 G

21 formation for Oct.02 event

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