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Дата изменения: Mon Jun 25 14:46:05 2012 Дата индексирования: Sun Apr 10 01:12:31 2016 Кодировка: Поисковые слова: virgo cluster |
I.M. Chertok(1), H.S. Hudson(2), E.I. Mogilevsky(1), V.N. Obridko(1), and N.S. Shilova(1)
(1) IZMIRAN, Troitsk, Moscow Region, Russia
(2) Solar Physics Research Corporation, ISAS, Sagamihara, Japan
Introduction
Usually:
CHs are large-scale areas of relatively cool, low density and emission plasma with open, predominantly unipolar magnetic fields and without significant inside activity (e.g., Zirker, 1977; K. Harvey, 1995; Mogilevsky et al., 1997; Obridko and Shelting, 1999; Zhao et al., 1999).
Small-scale bright points (see Davis, 1985; Kahler and Moses, 1990;
K.Harvey, 1995).
Sometimes -- medium-scale features in CHs:
Yohkoh/SXT
- a sufficiently large filament located inside a big CH;
- disappearance/eruption of the filament accompanied by a number of large-scale dynamic phenomena (a coronal wave, chain, CME, arcade)
Data:
SOHO/EIT, Yohkoh/SXT -- negative (inverted) images;
He 10830 е, H-alpha, SOHO/LASCO -- positive (normal)
images
On location of the filament
H-alpha and Yohkoh/SXTHe I, 10830 A
Comparison of the CH at He I, 10830 A with SOHO/EIT 284 A and Yohkoh/SXT images
Open magnetic field lines on the synoptic map
Open magnetic field lines and filament on the sphere
Quasi-separatrix layers on the synoptic map
Calculated magnetic data (combined; Figure 2)
Preceding activity
SOHO/EIT, 195 A (10-22 UT) (Figure 3)MLSO/HAO H-alpha and He I 10830 A (Figure 5)
MLSO/HAO, He I 10830 AYohkoh/SXT
Eruption
SOHO/EIT, 195 A (28d,22:36-29d, 01:48 UT (Figure 7)SOHO/EIT, 195 A (difference to 22:24 UT) (Figure 8)
Accompanying activity
SOHO/LASCO/C2SOHO/EIT (171, 195, 284, 304 A)
Dec 29, 1999 (Figure 10)
SOHO/EIT, 195 A (09:12-18:24 UT) (Figure 3)
MLSO/HAO H-alpha and He I 10830 A (Figure 5)
SOHO/EIT,
195 A (difference to 22:24 UT) (Figure 8)
Conclusion
Compressed POSTSCRIPT file of the paper accepted at "Astrophys. J."
paper_ps.zip (3.3 MB)