2012/02/20 by J. M. Borrero, V. Martinez Pillet, V. Martı́nez Pillet +21
Physics and Astronomy · #Astro and Planetary Science #FOS: Physical sciences #Ionosphere and magnetosphere dynamics #Solar and Space Plasma Dynamics #Solar and Stellar Astrophysics (astro-ph.SR) #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1202.4354
14 pages; 7 figures; to appear in the proceedings of the Hinode-4 meeting: "Unsolved Problems and Recent Insights". Editors: L.R. Bellot Rubio, F. Reale, and M. Carlsson; ASP Conference Series, 2012, vol 455. Astronomical Society of the Pacific
arxiv created 2012/02/20 · openalex publication_date 2012/02/20 · arxiv updated 2012/02/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 km2. 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.