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Titolo:
The granular magnetic fields of the quiet Sun
Autore:
Lin, HS; Rimmele, T;
Indirizzi:
Natl Solar Observ, Sunspot, NM 88349 USA Natl Solar Observ Sunspot NM USA88349 olar Observ, Sunspot, NM 88349 USA
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 1, volume: 514, anno: 1999,
parte:, 1
pagine: 448 - 455
SICI:
0004-637X(19990320)514:1<448:TGMFOT>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCALE; STARS;
Keywords:
polarization; Sun : granulation; Sun : infrared; Sun : magnetic fields;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Lin, HS Natl Solar Observ, Sacramento Peak,POB 62, Sunspot, NM 88349 USA Natl Solar Observ Sacramento Peak,POB 62 Sunspot NM USA 88349 USA
Citazione:
H.S. Lin e T. Rimmele, "The granular magnetic fields of the quiet Sun", ASTROPHYS J, 514(1), 1999, pp. 448-455

Abstract

We report new observations that combine high-precision infrared polarimetry and high-resolution imagery in the visible to demonstrate that most of the quiet solar surface contains a measurable magnetic field. We found that when observed at 1 arcsec(2) resolution, 68% of the observed area contains magnetic flux higher than 5 x 10(15) Mr (corresponding to an apparent average held of 1 G). The majority of these magnetic features have magnetic flux below 5 x 10(16) Mr. Their magnetic field strengths range from below 200 to1000 G, which means that their filling factors are on the order of 1%. Thespatial distribution and time evolution of these magnetic features are closely associated with the solar granulation. The properties of these weak granular magnetic features we observed differ from those of the intranetwork fields described in earlier observations. We also observed the formation and disappearance of a kilogauss magnetic feature associated with the development of intergranular lanes, which may be evidence of convective collapse.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/12/20 alle ore 00:05:04