Where the granular flows bend

Details Where the granular flows bend Where the granular flows bend

2010-08-03

arxiv.org/abs/1008.0517v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for the Sunrise Special Issue of ApJL

Scientific paper

Based on IMaX/Sunrise data, we report on a previously undetected phenomenon in solar granulation. We show that in a very narrow region separating granules and intergranular lanes the spectral line width of the Fe I 5250.2 A line becomes extremely small. We offer an explanation of this observation with the help of magneto-convection simulations. These regions with extremely small line widths correspond to the places where the granular flows bend from mainly upflow in granules to downflow in intergranular lanes. We show that the resolution and image stability achieved by IMaX/Sunrise are important requisites to detect this interesting phenomenon.

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