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Título

THE SOLAR INTERNETWORK. II. FLUX APPEARANCE and DISAPPEARANCE RATES

AutorGosic, Milan CSIC ORCID; Bellot Rubio, Luis R. CSIC ORCID; Toro, José Carlos del CSIC ORCID ; Orozco Suárez, David CSIC ORCID CVN; Katsukawa, Y.
Palabras claveSun: magnetic fields
Sun: photosphere
Fecha de publicación2016
EditorInstitute of Physics Publishing
CitaciónAstrophysical Journal 820(1) (2016)
ResumenSmall-scale internetwork magnetic fields are important ingredients of the quiet Sun. In this paper we analyze how they appear and disappear on the solar surface. Using high resolution Hinode magnetograms, we follow the evolution of individual magnetic elements in the interior of two supergranular cells at the disk center. From up to 38 hr of continuous measurements, we show that magnetic flux appears in internetwork regions at a rate of 120 ±3 Mx cm day (3.7 ±0.4 ×10 Mx day over the entire solar surface). Flux disappears from the internetwork at a rate of 125 ±6 Mx cm day (3.9 ±0.5 ×10 Mx day) through fading of magnetic elements, cancelation between opposite-polarity features, and interactions with network patches, which converts internetwork elements into network features. Most of the flux is lost through fading and interactions with the network, at nearly the same rate of about 50 Mx cm day. Our results demonstrate that the sources and sinks of internetwork magnetic flux are well balanced. Using the instantaneous flux appearance and disappearance rates, we successfully reproduce the time evolution of the total unsigned flux in the two supergranular cells.
URIhttp://hdl.handle.net/10261/135247
DOI10.3847/0004-637X/820/1/35
Identificadoresdoi: 10.3847/0004-637X/820/1/35
issn: 1538-4357
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