Small-scale Hαjets in the solar chromosphere

Kuridze, David, Mathioudakis, Mihalis, Jess, David, Shelyag, Sergiy, Christian, Damian, Keenan, Francis and Balasubramaniam, Karatholuvu (2011) Small-scale Hαjets in the solar chromosphere. Astronomy & Astrophysics, 533. A76. ISSN 0004-6361

Text (Article)
1108.1043v1.pdf - Accepted Version

Download (3MB) | Preview
Text (Article)
Shelyag S_solar chromosphere.pdf - Published Version

Download (4MB) | Preview
Official URL:


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.

The dataset comprises of 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.

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.

It is suggested that the siphon flow model of cool coronal loops is suitable for the interpretation of our observations. The jets are associated with small-scale explosive events, and may provide a mass outflow from the photosphere to the corona.

Item Type: Article
Uncontrolled Keywords: Sun: activity, Sun: chromosphere, Sun: faculae, plages, Sun: photosphere, Sun: surface magnetism
Subjects: F300 Physics
F500 Astronomy
G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Sergiy Shelyag
Date Deposited: 23 May 2016 10:37
Last Modified: 01 Aug 2021 09:17

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics