IPS Tomography Models Halo CME|
The Solar Physics group at UCSD's Center for Astrophysics and Space
Sciences has successfully modeled a massive halo CME in real-time.
The CME occurred on July 26, 2002 and was first observed by the
LASCO C2 Coronagraph on SOHO, the Solar and Heliospheric Observatory.
The structure was then seen in UCSD's tomographic reconstructions of
the solar wind which incorporate IPS (interplanetary scintillation)
data from Stelab in Japan. |
In the image on the left, taken by LASCO on July 26, a large mass ejection
can be seen near the Sun's south pole. The coronagraph image shows the solar
corona with a scale 3 degrees across. The image on the right is a
tomographic reconstruction (a CAT scan) of solar wind density.
There is a large density enhancement seen moving south of the Earth on July 29.
The reconstructions are 60 degrees
across and show the Sun, the Earth, and its orbit from an observer
located at three times the Sun-Earth distance, 30 degrees above the plane
of the Earth's orbit.
for .avi movie of July 26 event.
The IPS data also show high velocity wind flow
(darker blue) around the region of density enhancement, seen
The synoptic map below from July 29 shows the high density region south of