shelyag-smallscale-2011.pdf (4.25 MB)
Small-scale Hα jets in the solar chromosphere
journal contribution
posted on 2011-09-01, 00:00 authored by D Kuridze, M Mathioudakis, D B Jess, Sergiy ShelyagSergiy Shelyag, D J Christian, F P Keenan, K S BalasubramaniamAims. High temporal and spatial resolution observations from the Rapid Oscillations in the Solar Atmosphere (ROSA) multiwavelength imager on the Dunn Solar Telescope are used to study the velocities of small-scale Hα jets in an emerging solar active region. Methods. The dataset comprises simultaneous imaging in the Hα core, Ca ii K, and G band, together with photospheric line-of-sight magnetograms. Time-distance techniques are employed to determine projected plane-of-sky velocities. Results. The Hα images are highly dynamic in nature, with estimated jet velocities as high as 45 km s-1. These jets are one-directional, with their origin seemingly linked to underlying Ca ii K brightenings and G-band magnetic bright points. Conclusions. It is suggested that the siphon flow model of cool coronal loops is suitable for interpreting our observations. The jets are associated with small-scale explosive events, and may provide a mass outflow from the photosphere to the corona. © 2011 ESO.
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Journal
Astronomy and astrophysicsVolume
533Article number
A76Pagination
1 - 5Publisher
EDP SciencesLocation
London, Eng.Publisher DOI
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ISSN
0004-6361eISSN
1432-0746Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2011, ESOUsage metrics
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