Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-spacecraft Observations of the Coronal and Interplanetary
  Evolution of a Solar Eruption Associated with Two Active Regions   We investigate the coronal and interplanetary evolution of a coronal mass
ejection (CME) launched on 2010 September 4 from a source region linking two
active regions (ARs) 11101 and 11103, using extreme ultraviolet imaging,
magnetogram, white-light and in situ observations from SDO, STEREO, SOHO, VEX
and Wind. A potential-field source-surface model is employed to examine the
configuration of the coronal magnetic field surrounding the source region. The
graduated cylindrical shell model and a triangulation method are applied to
determine the kinematics of the CME in the corona and interplanetary space.
From the remote sensing and in situ observations we obtain some key results:
(1) the CME was deflected in both the eastward and southward directions in the
low corona by the magnetic pressure from the two ARs and possibly interacted
with another ejection, which caused that the CME arrived at VEX that was
longitudinally distant from the source region; (2) although VEX was closer to
the Sun, the observed and derived CME arrival times at VEX are not earlier than
those at Wind, which suggests the importance of determining both the frontal
shape and propagation direction of the CME in interplanetary space; (3) the
ICME was compressed in the radial direction while the longitudinal transverse
size was extended.

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The categories of this paper are: patt-sol
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
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The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th