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Author Moore, Ronald L. ♦ Cirtain, Jonathan W. ♦ Sterling, Alphonse C. ♦ Falconer, David A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ ERUPTION ♦ MAGNETISM ♦ PLASMA ♦ SOLAR CORONA ♦ SOLAR PROMINENCES ♦ SUN ♦ TELESCOPES ♦ ATMOSPHERES ♦ MAIN SEQUENCE STARS ♦ SOLAR ACTIVITY ♦ SOLAR ATMOSPHERE ♦ STARS ♦ STELLAR ACTIVITY ♦ STELLAR ATMOSPHERES ♦ STELLAR CORONAE
Abstract By examining many X-ray jets in Hinode/X-Ray Telescope coronal X-ray movies of the polar coronal holes, we found that there is a dichotomy of polar X-ray jets. About two thirds fit the standard reconnection picture for coronal jets, and about one third are another type. We present observations indicating that the non-standard jets are counterparts of erupting-loop H{alpha} macrospicules, jets in which the jet-base magnetic arch undergoes a miniature version of the blowout eruptions that produce major coronal mass ejections. From the coronal X-ray movies we present in detail two typical standard X-ray jets and two typical blowout X-ray jets that were also caught in He II 304 A snapshots from STEREO/EUVI. The distinguishing features of blowout X-ray jets are (1) X-ray brightening inside the base arch in addition to the outside bright point that standard jets have, (2) blowout eruption of the base arch's core field, often carrying a filament of cool (T {approx} 10{sup 4} - 10{sup 5} K) plasma, and (3) an extra jet-spire strand rooted close to the bright point. We present cartoons showing how reconnection during blowout eruption of the base arch could produce the observed features of blowout X-ray jets. We infer that (1) the standard-jet/blowout-jet dichotomy of coronal jets results from the dichotomy of base arches that do not have and base arches that do have enough shear and twist to erupt open, and (2) there is a large class of spicules that are standard jets and a comparably large class of spicules that are blowout jets.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-09-01
Publisher Place United States
Journal Astrophysical Journal
Volume Number 720
Issue Number 1


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