|
|
 |
|
|
Ann. Geophys., 16, 1265-1282, 1998
www.ann-geophys.net/16/1265/1998/
© European Geosciences Union 1998
Interplanetary scintillation observations of interaction regions in the solar wind
A. R. Breen1,*, P. J. Moran1, C. A. Varley1, W. P. Wilkinson1, P. J. S. Williams1, W. A. Coles2, A. Lecinski3, and J. Markkanen4
1University of Wales, Aberystwyth, Wales, EU
2University of California, San Diego, California, USA
3National Centre for Atmospheric Research, Boulder, Colorado, USA
4EISCAT Scientific Association, Sodankylä, Finland, EU
*Present address: Max-Planck Institut fär Aeronomie, Postfach 20, D-37189 Katlenburg-Lindau, Germany Tel: +49 5556 979 415; fax: +49 5556 979 410; e-mail: breen@helene.mpae.gwdg.de
Abstract. Co-rotating interaction regions (CIRs)
between fast and slow streams of plasma are a prominent feature of the solar
wind. Measurements of interplanetary scintillation (IPS) using the three widely
separated antennas of the EISCAT facility have been used to detect the
compression regions at the leading edges of interaction regions and to determine
the location and velocity of the structure. Observations show that interaction
regions have developed as close to the Sun as 25–30 solar radii, a result
supported by theoretical modelling which shows that the conditions needed for
CIRs to develop exist inside 30 solar radii.
Key words. EISCAT · Interplanetary
scintillation · Solar Wind
Full Article in PDF (2015 KB) |
|
|
