2010
DOI: 10.1051/0004-6361/200912807 View full text |Buy / Rent full text
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Abstract: Aims. We investigate the temporal evolution of magnetic flux emerging within a granule in the quiet-Sun internetwork at disk center.Methods. We combined IR spectropolarimetry of high angular resolution performed in two Fe i lines at 1565 nm with specklereconstructed G-band imaging. We determined the magnetic field parameters by a LTE inversion of the full Stokes vector using the SIR code, and followed their evolution in time. To interpret the observations, we created a geometrical model of a rising loop in 3D.… Show more

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“…The AR flux emergence site close to the leading spot is characterized by elongated granules and extended dark lanes, together with micropores (circular patches of reduced intensity) as seen in intensity (see Paper 1 and e.g., Gömöry et al 2010). The properties of the elongated granules found in our data are similar to those observed by Brants & Steenbeek (1985) in a forming AR, by Strous & Zwaan (1999) in a developing AR, and by Otsuji et al (2007) in the moat of a fully fledged sunspot.…”
Section: Elongated Granulessupporting
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“…The AR flux emergence site close to the leading spot is characterized by elongated granules and extended dark lanes, together with micropores (circular patches of reduced intensity) as seen in intensity (see Paper 1 and e.g., Gömöry et al 2010). The properties of the elongated granules found in our data are similar to those observed by Brants & Steenbeek (1985) in a forming AR, by Strous & Zwaan (1999) in a developing AR, and by Otsuji et al (2007) in the moat of a fully fledged sunspot.…”
Section: Elongated Granulessupporting
“…These kind of linear polarization signals are intrinsically different from the transient linear and circular polarization signals attributed to small-scale magnetic flux emergence events (e.g., Lites et al 1996;Martínez González et al 2007;Ishikawa & Tsuneta 2009;Martínez González & Bellot Rubio 2009;Danilovic et al 2010a;Gömöry et al 2010;Martínez González et al 2010;Palacios et al 2012). From the visual impression of the simulations at full resolution or after degradation, the simulations employed by us seem to lack such transient events, but still provide a reasonable reproduction of the spatial patterns of the observed linear polarization amplitudes.…”
Section: Summary and Discussionmentioning
“…Even if such high-energy events are uncommon in QS, granular-scale flux cancellation occurs more frequently (Rezaei et al 2007b;Kubo et al 2010). The necessary amount of "new" magnetic flux for a repeated occurrence of these events can be provided by small-scale flux emergence in the QS (e.g., Gömöry et al 2010, and references therein) that can lead to an energy transport from below the photosphere to the chromosphere. Part of the newly emerged emergent flux can reach the lower or upper chromosphere (Martínez González & Bellot Rubio 2009).…”
Section: Energy Sources For the Chromospheric Radiative Lossesmentioning