Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...442.1079h&link_type=abstract
Astronomy and Astrophysics, Volume 442, Issue 3, November II 2005, pp.1079-1086
Astronomy and Astrophysics
Astrophysics
4
Sun: Photosphere, Sun: Magnetic Fields, Sun: Sunspots
Scientific paper
High resolution 2D-spectro-polarimetric observations have been used to analyse the magnetic field and flow topologies of a penumbral connection between two opposite polarity solar pores. A filamentary structured Evershed-like material flow from one pore to the other along the magnetic field lines has been detected. The flow channels are co-spatial with bright penumbral filaments close to the pore which feeds the flow and the clear brightness-velocity relation vanishes close to the pore which represents the sink of the flow. The boundary between umbra and penumbra of the two pores show significant differences: bright comet-like penumbral grains represent endings of penumbral filaments at the flow sources whereas no such grains were found at the sinks of the flow. Furthermore, a systematic variation of the asymmetries of measured Stokes V profiles across the penumbral connection have been found. The obtained results are in accordance with the widely-accepted uncombed penumbra hypothesis and the moving flux tube model.
Gersin K.
Hirzberger Johann
Jurcak Jan
Puschmann Klaus G.
Sobotka Michal
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