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Titolo:
FINE-STRUCTURE AND THE EMISSION FILLING FACTOR
Autore:
KJELDSETHMOE O; BRYNILDSEN N; BREKKE P; MALTBY P;
Indirizzi:
UNIV OSLO,INST THEORET ASTROPHYS OSLO 3 NORWAY
Titolo Testata:
Space science reviews
fascicolo: 1-2, volume: 70, anno: 1994,
pagine: 89 - 92
SICI:
0038-6308(1994)70:1-2<89:FATEFF>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUNSPOTS; REGION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
O. Kjeldsethmoe et al., "FINE-STRUCTURE AND THE EMISSION FILLING FACTOR", Space science reviews, 70(1-2), 1994, pp. 89-92

Abstract

There is observational evidence for an extreme fine structure in the solar transition region, much smaller than 1'' in size (Dere et al., 1987, 1988) Corresponding to this extreme fine structure there appear to be an equally complex dynamical structure. We review the evidence for such dynamical extreme fine structure as demonstrated by the frequent appearance of multiple velocities, i.e. distinctly different velocities in the transition region occurring within the angular resolution element. Multiple velocities are prominent in active regions and particularly near sunspots, where velocity components may be supersonic. However, multiple velocities are frequent also in quiet regions. The consequences of such fine structure for modeling the transition region will be outlined. Finally the appropriate. CDS and SUMER observations needed to extend our knowledge of a finely structured transition region and corona, spatially or in time, are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 16:44:06