منابع مشابه
Solar Mini-Dimming Kinematics and Their Positive Correlations with Coronal Mass Ejections and Prominence
Solar mini-dimmings can be detect in the Extreme Ultra-Violet coronal eruptions. Here, sequences of 171_A images taken by Solar Dynamic Observatory/Atmospheric Imaging Assembaly on 13 June 2010 are used. In this special day, both of coronal mass ejection and prominence were observed. The average velocities and accelerations of 500 mini-dimmings which were detected using on feature based classif...
متن کاملThe coronal structure of Speedy Mic - II : Prominence masses and off - disc emission
Observations of stellar prominences on young rapidly rotating stars provide unique probes of their magnetic fields out to many stellar radii. We compare two independently obtained datasets of the K3 dwarf Speedy Mic (BO Mic, HD 197890) using the Anglo-Australian Telescope (AAT) and the ESO Very Large Telescope (VLT). Taken more than a fortnight apart they provide the first insight into the evol...
متن کاملThe coronal structure of Speedy Mic - I: A densely packed prominence system beyond co-rotation
We present new observations of the prominence system on the K3 dwarf Speedy Mic (BO Mic, HD 197890). Using an improved technique to track the absorption features in Hα we find a very active prominence system with approximately ten prominences on the observable hemisphere per rotation. From a total of 25 prominences we find an average axial distance of (2.85 ± 0.54)R∗ which is twice the co-rotat...
متن کاملCoronal transverse magnetohydrodynamic waves in a solar prominence.
Solar prominences are cool 10(4) kelvin plasma clouds supported in the surrounding 10(6) kelvin coronal plasma by as-yet-undetermined mechanisms. Observations from Hinode show fine-scale threadlike structures oscillating in the plane of the sky with periods of several minutes. We suggest that these represent Alfvén waves propagating on coronal magnetic field lines and that these may play a role...
متن کاملsolar mini-dimming kinematics and their positive correlations with coronal mass ejections and prominence
solar mini-dimmings can be detect in the extreme ultra-violet coronal eruptions. here, sequences of 171_a images taken by solar dynamic observatory/atmospheric imaging assembaly on 13 june 2010 are used. in this special day, both of coronal mass ejection and prominence were observed. the average velocities and accelerations of 500 mini-dimmings which were detected using on feature based classif...
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ژورنال
عنوان ژورنال: Nature
سال: 1908
ISSN: 0028-0836,1476-4687
DOI: 10.1038/078318c0