Issue |
A&A
Volume 490, Number 3, November II 2008
|
|
---|---|---|
Page(s) | L23 - L26 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:200810464 | |
Published online | 15 October 2008 |
Letter to the Editor
Small-scale magnetic field dynamics on the Sun at high spatial and temporal resolution
1
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
Received:
25
June
2008
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
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