Journal
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume 59, Issue -, Pages S757-S762Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pasj/59.sp3.S757
Keywords
sun : atmospheric motions; sun : corona; sun : UV radiation
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Funding
- Science and Technology Facilities Council [PP/D002907/1] Funding Source: researchfish
- STFC [PP/D002907/1] Funding Source: UKRI
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The velocity structures of jets in a coronal hole have been derived for the first time. Hinode observations revealed the existence of many bright points in coronal holes. They are loop-shaped and sometimes associated with coronal jets. Spectra obtained with the Extreme-ultraviolet Imaging Spectrometer aboard Hinode were analyzed to infer the Doppler velocity of bright loops and jets in a coronal hole of the north polar region. Elongated jets above bright loops are found to be blue-shifted by 30 km s(-1) at maximum, while foot points of bright loops are red-shifted. Blue-shifts detected in coronal jets are interpreted as being upflows produced by magnetic reconnection between emerging flux and the ambient field in the coronal hole.
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