Real-time Analysis of Global Waves Accompanying Coronal Mass Ejections
Technical Report,01 Oct 2014,30 Jun 2016
University College London London United Kingdom
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Moreton-Ramsey waves are thin, bright wave-like features seen in H-alpha observations of the solar chromosphere. They are strongly associated with coronal mass ejections CMEs and can cover a significant portion of the Sun in under an hour. However, their origin and relationship to CMEs remains a mystery due to the manual techniques typically employed to identify and analyse them. Here we present the final report of a project developing an automated algorithm to identify, track and analyse Moreton-Ramsey waves. The Moreton Pulse Identification and TrackingAlgorithm MorePITA uses a similar approach to the Coronal Pulse Identification and Tracking Algorithm CorPITA, but is optimised to use H-alpha observations from the ISOON telescope. We describe the operation of MorePITA and its adaptation to work with other H-alpha instruments, potentiallyallowing full 24 hour coverage of the solar chromosphere. MorePITA was used to search for co-existing Moreton-Ramsey waves, EIT waves and CMEs although no Moreton-Ramsey waves were identified during events with observed EIT waves. We conclude that this is due to insufficient downward pressure from the propagating EIT wave on the solar atmosphere.
- Test Facilities, Equipment and Methods