Solar Phenomena Associated with ``EIT Waves''

Details Solar Phenomena Associated with ``EIT Waves'' Solar Phenomena Associated with ``EIT Waves''

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...569.1009b&link_type=abstract

The Astrophysical Journal, Volume 569, Issue 2, pp. 1009-1015.

Astronomy and Astrophysics

Astronomy

116

Sun: Activity, Sun: Coronal Mass Ejections (Cmes), Sun: Flares, Sun: Radio Radiation, Sun: Uv Radiation, Waves

Scientific paper

In an effort to understand what an ``EIT wave'' is and what its causes are, we have looked for correlations between the initiation of EIT waves and the occurrence of other solar phenomena. An EIT wave is a coronal disturbance, typically appearing as a diffuse brightening propagating across the Sun. A catalog of EIT waves, covering the period from 1997 March through 1998 June, was used in this study. For each EIT wave, the catalog gives the heliographic location and a rating for each wave, where the rating is determined by the reliability of the observations. Since EIT waves are transient, coronal phenomena, we have looked for correlations with other transient, coronal phenomena: X-ray flares, coronal mass ejections (CMEs), and metric type II radio bursts. An unambiguous correlation between EIT waves and CMEs has been found. The correlation of EIT waves with flares is significantly weaker, and EIT waves frequently are not accompanied by radio bursts. To search for trends in the data, proxies for each of these transient phenomena are examined. We also use the accumulated data to show the robustness of the catalog and to reveal biases that must be accounted for in this study.

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