THE FORMATION OF FILAMENT CHANNELS K. Muglach, Y.-M. Wang Naval Research Laboratory.
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THE FORMATION OF FILAMENT CHANNELS K. Muglach, Y.-M. Wang Naval Research Laboratory
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Transcript of THE FORMATION OF FILAMENT CHANNELS K. Muglach, Y.-M. Wang Naval Research Laboratory.
THE FORMATION OF FILAMENT CHANNELS
K. Muglach, Y.-M. Wang
Naval Research Laboratory
More information on:
http://wwwsolar.nrl.navy.mil/~muglach/filaments.html
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
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
one example:
date: 20-23 June 02
region: AR 10003,
small decaying bipolar AR
location: equator
19.Jun.02, AR 10003
MDI full disk magnetogram
20-23.Jun.02, AR 10003
AR 10003
20-23.Jun.02
flux= +- 50G
+- 7G
19.Jun.02, AR 10003
20:00 UT
20.Jun.02, AR 10003
19:34 UT
21.Jun.02, AR 10003
20:30 UT
Cartoon
Formation of an arcade of loops by flux cancellation
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
