Large-scale structures and multiple neutral lines associated with coronal mass ejections

Details Large-scale structures and multiple neutral lines associated with coronal mass ejections Large-scale structures and multiple neutral lines associated with coronal mass ejections

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...10224161w&link_type=abstract

Journal of Geophysical Research, Volume 102, Issue A11, p. 24161-24174

Astronomy and Astrophysics

Astrophysics

53

Interplanetary Physics: Sources Of The Solar Wind, Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections, And Astronomy: Magnetic Fields, And Astronomy: X Rays, Gamma Rays, And Neutrinos

Scientific paper

We use Yohkoh soft X-ray telescope (SXT) images of eruptive events visible against the solar disk to examine the coronal structures and the boundaries of the large-scale magnetic fields considered to be involved in coronal mass ejections (CMEs). From an initial list of about 100 large-scale events we selected five for detailed study. The transient X-ray structures in these events spanned distances across the solar surface ranging from 35 to >100 heliographic degrees, comparable to the spans of white light CMEs observed at the limb. The widths of the coronal loop arcades spanned two or three neutral lines, or a single, highly convoluted neutral line. Our interpretation of these results is that multipolar magnetic systems are a common configuration of the source fields of many CMEs, contrary to the first-order approximation that CMEs involve the eruption of simple, bipolar structures.

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