Magnetic flux cancellation associated with a recurring solar jet observed with Hinode, RHESSI, and STEREO/EUVI

Chifor, C., Isobe, H., Mason, H.E., Hannah, I.G. , Young, P.R., Del Zanna, G., Krucker, S., Ichimoto, K., Katsukawa, Y. and Yokoyama, T. (2008) Magnetic flux cancellation associated with a recurring solar jet observed with Hinode, RHESSI, and STEREO/EUVI. Astronomy and Astrophysics, 491(1), pp. 279-288. (doi:10.1051/0004-6361:200810265)

Full text not currently available from Enlighten.

Abstract

Aims: We study the physical properties of a recurring solar active region jet observed in X-rays and extreme-ultraviolet (EUV).

Methods: Multi-wavelength data from all three instruments on board Hinode were analysed. X-ray imaging and spectroscopy of the microflaring emission associated with the jets was performed with the Reuven Ramaty High Energy Spectroscopic Imager (RHESSI). Associated EUV jets were observed with the Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI)/Extreme Ultraviolet Imager (EUVI) on board STEREO.

Results: We found a correlation between recurring magnetic flux cancellation close to a pore, the X-ray jet emission, and associated Ca II H ribbon brightenings. We estimated the lower limit for the decrease in magnetic energy associated with the X-ray jet emission at 3 × 10²⁹ erg. The recurring plasma ejection was observed simultaneously at EUV and X-ray temperatures, associated with type III radio bursts and microflaring activity at the jet footpoint.

Conclusions: The recurring jet (EUV and X-ray) emissions can be attributed to chromospheric evaporation flows due to recurring coronal magnetic reconnection. In this process, the estimated minimum loss in the magnetic energy is sufficient to account for the total energy required to launch the jet.

Item Type:Articles
Keywords:Sun: activity, Sun: corona, Sun: flares, Sun: magnetic fields, Sun: UV radiation, Sun: X-rays, gamma rays
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hannah, Dr Iain
Authors: Chifor, C., Isobe, H., Mason, H.E., Hannah, I.G., Young, P.R., Del Zanna, G., Krucker, S., Ichimoto, K., Katsukawa, Y., and Yokoyama, T.
Subjects:Q Science > QB Astronomy
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Astronomy and Astrophysics
Publisher:EDP Sciences
ISSN:0004-6361
ISSN (Online):1432-0746
Published Online:11 September 2008

University Staff: Request a correction | Enlighten Editors: Update this record