C. Möstl et al 2009 ApJ 705 L180 doi:10.1088/0004-637X/705/2/L180
C. Möstl1,2, C. J. Farrugia3, M. Temmer2, C. Miklenic1,2, A. M. Veronig2, A. B. Galvin3, M. Leitner4 and H. K. Biernat1,2
Show affiliationsIn a case study (2008 June 6-7) we report on how the internal structure of a coronal mass ejection (CME) at 1 AU can be anticipated from remote observations of white-light images of the heliosphere. Favorable circumstances are the absence of fast equatorial solar wind streams and a low CME velocity which allow us to relate the imaging and in situ data in a straightforward way. The STEREO-B spacecraft encountered typical signatures of a magnetic flux rope inside an interplanetary CME (ICME) whose axis was inclined at 45° to the solar equatorial plane. Various CME direction-finding techniques yield consistent results to within 15°. Further, remote images from STEREO-A show that (1) the CME is unambiguously connected to the ICME and can be tracked all the way to 1 AU, (2) the particular arc-like morphology of the CME points to an inclined axis, and (3) the three-part structure of the CME may be plausibly related to the in situ data. This is a first step in predicting both the direction of travel and the internal structure of CMEs from complete remote observations between the Sun and 1 AU, which is one of the main requirements for forecasting the geo-effectiveness of CMEs.
interplanetary medium; solar-terrestrial relations; Sun: coronal mass ejections (CMEs)
96.60.ph Coronal mass ejection
Issue 2 (2009 November 10)
Received 2009 June 25, accepted for publication 2009 October 8
Published 2009 October 22
C. Möstl et al 2009 ApJ 705 L180
Jamil Daboul et al 2003 J. Phys. A: Math. Gen. 36 2525
Peter R. M. Eisenhardt et al. 2008 ApJ 684 905
Pauline Barmby et al. 2009 The Astronomical Journal 137 207
Martin Haas et al. 2009 ApJ 695 724
T. Giannini et al. 2009 ApJ 704 606
J.-S. Huang et al. 2009 ApJ 700 183
J Z Hu et al 2006 J. Phys.: Condens. Matter 18 S1091
Lowell Miyagi et al 2006 J. Phys.: Condens. Matter 18 S995
S Speziale et al 2006 J. Phys.: Condens. Matter 18 S1007