Small-scale Hα jets in the solar chromosphere

David Kuridze, M. Mathioudakis, D. B. Jess, D. J. Christian, F. P. Keenan, K. S. Balasubramaniam

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

8 Dyfyniadau(SciVal)


Aims. 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
Iaith wreiddiolSaesneg
Rhif yr erthyglA76
Nifer y tudalennau5
CyfnodolynAstronomy and Astrophysics
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Medi 2011

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