Physics
Scientific paper
May 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640620m&link_type=abstract
American Astronomical Society, AAS Meeting #216, #406.20; Bulletin of the American Astronomical Society, Vol. 41, p.883
Physics
Scientific paper
Nearly half of all H-alpha macrospicules in polar coronal holes appear to be miniature filament eruptions (Yamauchi et al 2004, ApJ, 605, 511). This suggests that there is a large class of X-ray jets in which the jet-base magnetic arcade undergoes a blowout eruption as in a CME, instead of remaining static as in most solar X-ray jets, the standard jets that fit the model advocated by Shibata (e.g., Shibata et al 1992, PASJ, 44, L173). Along with a cartoon depicting the standard model, we present a cartoon depicting the signatures expected of blowout jets in coronal X-ray images. From Hinode/XRT movies and STEREO/EUVI snapshots in polar coronal holes, we present examples of (1) X-ray jets that fit the standard model, and (2) X-ray jets that do not fit the standard model but do have features appropriate for blowout jets. These features are (1) a flare arcade inside the jet-base arcade in addition to the small flare arcade (bright point) outside that standard jets have, (2) a filament of cool (T 80,000 K) plasma that erupts from the core of the jet-base arcade, and (3) an extra jet strand that should not be made by the reconnection for standard jets but could be made by reconnection between the ambient unipolar open field and the opposite-polarity leg of the filament-carrying flux-rope core field of the erupting jet-base arcade. We therefore infer that these non-standard jets are blowout jets, jets made by miniature versions of the sheared-core-arcade eruptions that make CMEs.
This work was funded by NASA's Science Mission Directorate through the Heliophysics Guest Investigators Program, the Hinode Project, and the Living With a Star Targeted Research and Technology Program.
Cirtain Jonathan W.
Moore Ronald L.
Sterling Alphonse C.
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