Physics
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..115s&link_type=abstract
The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 115-118 (1999).
Physics
10
Visible
Scientific paper
We present observations of slowly evolving, balloon-type solar mass ejections observed by the LASCO coronagraphs aboard SOHO. These mass ejections are typically observed to rise gradually in the solar corona for several hours (>20 hours) as large loops or balloons crossing the entire field of view of the coronagraphs. Usually, their angular extent does not change much. Analysis of several such cases of balloon-type mass ejections show that they rise with very slow speeds (less than 50 km s-1) up to a distance of 2 Rsolar and then are accelerated to higher speeds until 5 Rsolar. From a distance of about 20 Rsolar, the mass ejecta attain almost a constant speed ranging between 300 and 500 km s-1. The speed profiles obtained for individual mass ejections indicate that they trace out the slow solar wind and, thus, provide an insight into the initiation and the propagation of the CMEs into the solar wind.
Inhester Bernd
Podlipnik Borut
Schwenn Rainer
Srivastava Nandita
Stenborg Guillermo
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