PLASMOID RELEASES IN THE HELIOSPHERIC CURRENT SHEET AND ASSOCIATED CORONAL HOLE BOUNDARY LAYER EVOLUTION

摘要: As the heliospheric current sheet (HCS) is corotating past STEREO-B, near-Earth spacecraft ACE, Wind and Cluster, STEREO-A over more than three days between 2008 January 10 14, we observe various sections of (near-pressure-balanced) flux-rope- magnetic-island-type plasmoids in associated plasma (HPS). The can qualify as slow interplanetary coronal mass ejections are relatively low proton beta (<0.5) structures, with small length scales (an order magnitude lower typical magnetic cloud values) field strengths (2-8 nT). One them, particular, detected at corresponds to first reported evidence a detached plasmoid HPS. situ signatures near Earth long-decay X-ray flare small-scale streamer ejecta, observed remotely white-light coronagraphs aboard STEREO-B SOHO tracked by triangulation. Before arrival HPS, hole boundary layer (CHBL) situ. multi-spacecraft observations indicate CHBL stream HCS but decreasing speed distribution suggestive localized or transient nature. While may reasonably assume that an interaction ejecta provides source momentum for ejecta's acceleration, outstanding composition properties provide here circumstantial this possibly earlier one, taking place during swelling when rises slowly, results additional mixing processes.