Letter to the Editor
Small-scale magnetic field dynamics on the Sun at high spatial and temporal resolution
Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany e-mail: [nazaret;olok;kneer]@astro.physik.uni-goettingen.de
2 Central Astronomical Observatory of the Russian Academy of Sciences, Pulkovskoye chaussee 65/1, 196140 St. Petersburg, Russia
Accepted: 18 September 2008
Aims. We present examples of the time evolution of phenomena occurring in the quiet Sun photosphere as seen from observations of high spatial and spectral resolution and with a time cadence of 23 s.
Methods. A time sequence of about 5 min has been taken with the Göttingen Fabry-Perot spectropolarimeter at the VTT in the 6173 Å line. The data were reconstructed with speckle methods.
Results. With a polarimetric sensitivity of 2 10 ( G), the formation of a bright point as seen from broadband and line-minimum intensities, as well as in magnetograms and Dopplergrams can be traced in detail. Other events, like a stable mixed-polarity configuration in the intergranules and the appearance of magnetic signature above granules in both dark and bright areas are presented.
Key words: Sun: magnetic fields / techniques: high angular resolution / techniques: polarimetric
© ESO, 2008