Doing Science with the VSO: Signatures of CME Initiation

Details Doing Science with the VSO: Signatures of CME Initiation Doing Science with the VSO: Signatures of CME Initiation

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh21b0414d&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH21B-0414

Physics

7513 Coronal Mass Ejections, 7519 Flares, 7594 Instruments And Techniques

Scientific paper

The Virtual Solar Observatory (VSO) was designed to simplify and unify access to solar physics data. It provides a single interface to a broad range of data types and sources which previously would have required considerable effort to collect one by one. By combining access to online data sources with published scientific catalogs, the VSO can facilitate new science. This study seeks to investigate whether signatures of coronal mass ejection (CME) initiation can be used to constrain CME initiation models. We selected events from the SOHO/LASCO CME catalog, generated a time window between the calculated CME ``start time" and the first observation of the CME in LASCO C2, and examined EIT ``CME Watch" and H-alpha observations identified by a VSO query as falling in the specified time windows. We prioritized the EUV data by selecting those events for which GOES data indicated a flare, and identified flare sites and dimming regions in the EUV data, with the aim of more precisely determining CME initiation locations and times. In addition, we used H-alpha data to investigate CME's associated with by filament eruptions. The results allow us to calculate minimum acceleration rates, and determine correlations between coronal structures, ejection events, and acceleration rates. We use these correlations in turn to identify viable CME initiation mechanisms.

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