[Cymraeg]

Physics projects for Y3 and Y4 students


Project description

Space Weather forecasting: Predicting the occurrence of large eruptions from solar active regions

(supervisor: Huw Morgan)

Nature of project: data analysis, software

Available to students on full-time physics degree schemes or joint students.

Project description and methodology

Large active regions are the main cause of energetic CMEs that can cause adverse Space Weather conditions at the Earth. Currently, the early warning systems for large CMEs begin with the observation of an actual eruption. Unfortunately, by the time of this warning, the most energetic particles (protons) produced by the eruption are within a few minutes of reaching Earth. Ability to predict large eruptions, and to give additional time for warnings, is important.

This project involves searching for possible signatures in active region observations that are precursors to large eruptions. Active regions are observed frequently and regularly by the AIA instrument aboard SDO, in multiple wavelength channels. The underlying photospheric field is observed by the HMI instrument aboard SDO. Significant changes in time in EUV emission and/or magnetic field, or changes in the spatial distribution of emission/magnetic field within the active region, may aid in predicting large CMEs. The student must find historical data from active regions that erupt, and find possible signatures that are precursors to eruptions.

A successful project will develop beyond the above in one/some of the following directions:
The best projects will show creativity in processing the data and building a prediction algorithm, and a sensible statistical approach to determining the accuracy of the algorithm.

When considering where to take your project, please bear in mind the time available. It is preferable to do fewer things well than to try many and not get conclusive results on any of them. However, sometimes it is useful to have a couple of strands of investigation in parallel to work on in case delays occur.

Additional scope or challenge if taken as a Year-4 project: For a 4th year project, the student must build a database of active regions outside of eruption times, and thus find statistical confidence limits on possible precursor signatures. This will require applying the algorithm to a far larger set of data.

Please speak to Huw Morgan (hum2) if you consider doing this project.

Initial literature for students:

  1. Korsos & Erdelyi, Astrophysical Journal 823 (2016) 153, On the State of a Solar Active Region Before Flares and CMEs
  2. Bobra & Illionids, Astrophysical Journal 821 (2016) 127, Predicting Coronal Mass Ejections Using Machine Learning Methods
  3. Physics of the Solar Corona, Marcus Aschwanden (book, introductory chapters); Springer Science & Business Media, 2006
  4. Shinsuke et al, Publications of the Astronomical Society of Japan 66 (2014) S17, Coronal behavior before the large flare onset

Novelty, degree of difficulty and amount of assistance required

Project is software-intensive. Student must be able to use IDL.

Project milestones and deliverables (including timescale)

milestoneto be completed by
Understanding of problem and possible solutionsend of October
Download & open data in IDL. Identify and isolate regions of interestChristmas
Basic working set of softwareend of February
Full analysis of several test casesEaster