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Real-time Analysis of Global Waves Accompanying Coronal Mass Ejections

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Technical Report,01 Oct 2014,30 Jun 2016

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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.

Subject Categories:

  • Astrophysics
  • Test Facilities, Equipment and Methods

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