Accession Number : AD1018647


Title :   Real-time Analysis of Global Waves Accompanying Coronal Mass Ejections


Descriptive Note : Technical Report,01 Oct 2014,30 Jun 2016


Corporate Author : University College London London United Kingdom


Personal Author(s) : Long,David M ; Rae,I J ; Perez-Suarez,David


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1018647.pdf


Report Date : 01 Sep 2016


Pagination or Media Count : 21


Abstract : 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.


Descriptors :   Coronal Mass Ejections , Chromosphere , algorithms , software development , wave propagation


Subject Categories : Astrophysics
      Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE