[English]

Prosiectau Ffiseg ar gyfer myfyrwyr bl.3 a bl.4


Disgrifiad prosiect

Wave detection in the solar atmosphere with Hinode/EIS

(supervisor: Youra Taroyan)

Nature of project: data analysis, software

Available to students on full-time physics degree schemes only.

Project description and methodology

Waves are of great diagnostic value to study the properties of the atmosphere of the Sun.

The EUV imaging spectrometer (EIS) contains numerous emission lines originating from ions existing at a range of temperatures between the chromospehre and the corona.

Data from Hinode/EIS observations will be processed and analysed using Solar Soft. Spectral line profiles will be constructed. Intensity and Doppler shift time series will be extracted from line profiles. Possible structures of interest include coronal loops in active regions above sunspots and in quiet sun regions.

The project may require some modification in case of no access to the required software. The plan is to switch to open source software based on python and possibly use data from other instruments.

A successful project will develop beyond the above in one/some of the following directions:
The aim of the project is the detection of waves in time series obtained from spectroscopic data. Waves will be looked for both in the velocity and intensity time series.

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: The detected waves will be classified and used for diagnostic purposes.

Please speak to Youra Taroyan if you consider doing this project.

Initial literature for students:

  1. Aschwanden, M. Physics of the Solar Corona, Springer 2005
  2. Stix, M. The Sun, Springer 2002
  3. Young, P. Hinode/EIS online analysis guide

Novelty, degree of difficulty and amount of assistance required

The students will be introduced to the IDL package Solar Soft. The project will help the students to gain firsthand experience of dealing with satellite data.

The project may require some modification in case of no access to the required software. The plan is to switch to open source software based on python and possibly use data from other instruments.

Project milestones and deliverables (including timescale)

milestoneto be completed by
Installing SSW and downloading the dataend of October
Analysing the data and performing the actual measurements Christmas
Time series analysis and wave detectionend of February
Discussion and physical interpretationEaster