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Titolo:
Zero points of the magnetic field in the solar atmosphere
Autore:
Filippov, BP;
Indirizzi:
Russian Acad Sci, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk 142092, Moscow Oblast, Russia Russian Acad Sci Troitsk Moscow Oblast Russia 142092 oscow Oblast, Russia
Titolo Testata:
ASTRONOMY REPORTS
fascicolo: 8, volume: 43, anno: 1999,
pagine: 549 - 555
SICI:
1063-7729(199908)43:8<549:ZPOTMF>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
TOPOLOGICAL SINGULARITIES; CHROMOSPHERIC STRUCTURE; ACTIVE REGIONS; RECONNECTION; FLARES; MODELS; NULLS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Filippov, BP Russian Acad Sci, Inst Terr Magnetism Ionosphere & Radiowave Propag, Troitsk 142092, Moscow Oblast, Russia Russian Acad Sci Troitsk Moscow Oblast Russia 142092 Russia
Citazione:
B.P. Filippov, "Zero points of the magnetic field in the solar atmosphere", ASTRON REP, 43(8), 1999, pp. 549-555

Abstract

Examples of saddle structures observed in images of the Sun in H alpha, soft X-ray (YOHKOH SXT), and ultraviolet (SOHO EIT) emission are presented. Since the plasma distribution is controlled by the magnetic field, the saddles testify to the presence of hyperbolic singularities in the magnetic field. Such singularities play an important role in the theory of dare energy release. It is usually supposed that conditions for the development of current sheets arise in them, leading to magnetic reconnection, which transformsmagnetic energy into thermal and kinetic energy. The observed saddle structures can correspond either to two-dimensional or three dimensional magnetic-field singularities, depending on the geometry, projection, symmetry, andso on. In nearly all cases, the central parts of the saddles remain dark, and do not exhibit additional energy release.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 18:01:06