A gigantic coronal jet ejected from a compact active region in a coronal hole

Details A gigantic coronal jet ejected from a compact active region in a coronal hole A gigantic coronal jet ejected from a compact active region in a coronal hole

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...431l..51s&link_type=abstract

The Astrophysical Journal, Part 2 - Letters, vol. 431, no. 1, p. L51-L53

Astronomy and Astrophysics

Astronomy

83

Coronal Holes, Gamma Rays, Magnetic Field Reconnection, Solar Flares, Solar Magnetic Field, Solar X-Rays, Gamma Ray Astronomy, Kinetic Energy, Thermal Energy, Translational Motion, X Ray Astronomy

Scientific paper

A gigantic coronal jet greater than 3 x 105 km long (nearly half the solar radius) has been found with the soft X-ray telescope (SXT) on board the solar X-ray satellite, Yohkoh. The jet was ejected on 1992 January 11 from an 'anemone-type' active region (AR) appearing in a coronal hole and is one of the largest coronal X-ray jets observed so far by SXT. This gigantic jet is the best observed example of many other smaller X-ray jets, because the spatial structures of both the jet and the AR located at its base are more easily resolved. The range of apparent translational velocities of the bulk of the jet was between 90 and 240 km s-1, with the corresponding kinetic energy estimated to be of order of 1028 ergs. A detailed analysis reveals that the jet was associated with a loop brightening (a small flare) that occurred in the active region. Several features of this observation suggest and are consistent with a magnetic reconnection mechanism for the production of such a 'jet-loop-brightening' event.

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