Quick search Find article
Quick search
Find article

LINKING REMOTE IMAGERY OF A CORONAL MASS EJECTION TO ITS IN SITU SIGNATURES AT 1 AU

FREE ISSUE

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 affiliations


In 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.


Keywords

interplanetary medium; solar-terrestrial relations; Sun: coronal mass ejections (CMEs)


PACS

96.60.ph Coronal mass ejection

96.50.Xy Heliosphere/ interstellar medium interactions

96.60.Vg Particle emission, solar wind

Subjects

Astrophysics and astroparticles

Dates

Issue 2 (2009 November 10)

Received 2009 June 25, accepted for publication 2009 October 8

Published 2009 October 22



Related review articles

What's this?
View review articles related to this research to gain an insight into the key trends in this subject area. Related review articles are selected based on PACS/MSC codes, and are no more than three years old.

  1. Solar neutrinos, helioseismology and the solar internal dynamics
  2. The solar UV–x-ray spectrum from 1.5 to 2000 Å
  3. Spectroscopy: from atoms to cosmic objects

View by subject




Export








Please login to access our web services, or create an account if you don't yet have one.

You must have cookies enabled in your web browser to be able to login.

Username
Password

Forgotten your password? Get a new one here.