Small-Scale H-alpha Jets in the Solar Chromosphere (Postprint)
Abstract
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 H jets in an emerging solar active region. Methods: The dataset comprises simultaneous imaging in the H 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 H 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 15, 2011
- Accession Number
- ADA550408
Entities
People
- D. B. Jess
- D. J. Christian
- D. Kuridze
- F. P. Keenan
- K. S. Balasubranamiam
- M. Mathioudakis
- S. Shelyag
Organizations
- Air Force Research Laboratory