1988 Fiscal Year Final Research Report Summary
The Study of Solar Active Phenomena following the emergence of bipolar magnetic regions
| Project/Area Number |
61540182
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | Kyoto University |
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Principal Investigator |
KUROKAWA HIROKI Faculty of Science, Kyoto University Associate Professor, 理学部, 助教授 (80135508)
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| Co-Investigator(Kenkyū-buntansha) |
FUNAKOSHI Yasuhiro Faculty of Science, Kyoto University, Research Associate, 理学部, 教務職員 (80127133)
KITAI Reizaburo Faculty of Science, Kyoto University, Research Associate, 理学部, 助手 (40169850)
NAKAI Yoshihiro Faculty of Science, Kyoto University, Associate Professor, 理学部, 助教授 (80025337)
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| Project Period (FY) |
1986 – 1987
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| Keywords | EMERGING FLUX REGION / SOLAR ACTIVE REGION / SOLAR FLARE / サージ / 磁気再結合 |
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| Research Abstract |
Sun is a unique star whose surface activities can be actually observed. Most of solar active phenomena are related to redistribution or reconnection processes of emerging magnetic fields. Therefore the study of birth and growth of active regions is important to know not only inherent features but also physical mechanism of flares, surges and other active phenomena.
Observations were made with the 60 cm Domeless Solar Telescope at Hida Observatory, Kyoto University. The principal results are summarized as Followed.
(1) Two types of processes for the development of magnetic shear configurations between sunspots: (A) collision of two sunspots of opposite magnetic polarities, and (B) successive emergence of twisted magnetic flux ropes.
(2) The process (B) is essential for the production of major flares.
(3) The first manifestation of the emerging flux region in the solr surface is a surge activity.
(4) The surges in emerging flux regions are produced by reconnection between newly-emerging fields and older surrounding magnetic fields.
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Research Products
(11 results)
