J. M. Borrero, V. Martinez Pillet, R. Schlichenmaier, W. Schmidt, T. Berkefeld, S. K. Solanki, J. A. Bonet, J. C. del Toro Iniesta, V. Domingo, P. Barthol, A. Gandorfer
In this contribution we describe some recent observations of high-speed
magnetized flows in the quiet Sun granulation. These observations were carried
out with the Imaging Magnetograph eXperiment (IMaX) onboard the stratospheric
balloon {\sc Sunrise}, and possess an unprecedented spatial resolution and
temporal cadence. These flows were identified as highly shifted circular
polarization (Stokes $V$) signals. We estimate the LOS velocity responsible for
these shifts to be larger than 6 km s$^{-1}$, and therefore we refer to them as
{\it supersonic magnetic flows}. The average lifetime of the detected events is
81.3 s and they occupy an average area of about 23\,000 km$^2$. Most of the
events occur within granular cells and correspond therefore to upflows. However
some others occur in intergranular lanes or bear no clear relation to the
convective velocity pattern. We analyze a number of representative examples and
discuss them in terms of magnetic loops, reconnection events, and convective
collapse.
View original:
http://arxiv.org/abs/1202.4354
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