Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.2205u&link_type=abstract
American Astronomical Society, SPD meeting #37, #22.05; Bulletin of the American Astronomical Society, Vol. 38, p.249
Astronomy and Astrophysics
Astronomy
Scientific paper
We present results from the study of the sources of 15 coronal mass ejections (CME) observed with TRACE. These events are a subset of the preliminary 48 catalogued CME events with sources that fall within ±400 arcsec of disk center and were observed with TRACE, in any of its UV or EUV bandpasses, during the period 1998--2003. The evolution of the eruptions is analyzed in the context of the magnetic topology given by a potential field extrapolation of a photospheric magnetogram. The extrapolations are used to determine the presence of nulls and quasi-separatrix layers. We discuss the results in the context of the current CME models and their observational predictions. The breakout model for CMEs, for example, requires the presence of a null encompassing the sheared neutral line. Pre-eruption reconnection is expected to take place at the null. We find magnetic nulls in many of the events. For most of them, however, we do not see compelling evidence for pre-eruption reconnection.This research was supported by the NASA Living With a Star Program.
Ugarte-Urra Ignacio
Warren Harry P.
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