TÄHT7022 Solar structure and activity (6 op/6 ECTS)

The course was lectured every second year during 2002-2013.


Contact information:
Silja Pohjolainen, Tuorla Observatory, email silpoh [at] utu.fi , homepage http://users.utu.fi/silpoh



Course description
Subject: Astronomy/Space Physics/Physics
Objectives: The student shall know the basic structure of the Sun and understand its complex and dynamic nature. The student shall be familiar with the physical mechanisms that create solar activity, and also know how the different types of activity can be observed and measured.
Content: The Sun as a star, interior and atmosphere. The "quiet" Sun and its features (bright points, filaments, coronal holes, solar wind, etc.). Eruptive features (flares, filament eruptions, coronal mass ejections, shock waves, etc.). Observations and data, with focus on radio emission and multi-wavelength analysis. The use of Solarsoft (a set of integrated software libraries, data bases, and system utilities which provide a common programming and data analysis environment for solar physics). Emission mechanisms (plasma emission, bremsstrahlung, synchrotron) and methods of identification. Theoretical models for flares and associated phenomena.
Teaching Methods: Lectures, demonstrations, exercises and/or practical work with a solar radio telescope at Tuorla Observatory
Recommended year of study: 4th or 5th or graduate studies, periods III and IV
Prerequisites: High-energy Astrophysics, Plasma Physics and Radio Astronomy - or equivalent - are recommended but not obligatory prerequisites
Study Materials: Lecture Notes + additional material
Modes of study: Written exam and sufficient amount of demonstration, report on practical work
Evaluation: 1-5

Lecture Notes

Contents
Chapter 1
Chapter 2
Chapter 3
Chapter 4 (updated in 2013!)
Chapter 5
See movie of Solar Orbiter and Solar Probe orbits
Chapter 6
Chapter 7 (updated in 2013!)
Chapter 8
Chapter 9
Chapter 10
Chapter 11

2013 Lecture Notes as one pdf file (60MB)

Lecture topics:
  • History of solar research
  • Sun as a star
  • Solar structure (especially atmospheric)
  • Emission mechanisms
  • Radio astronomy for solar research, radio instrumentation
  • Optical, EUV, X-ray, and gamma-ray instruments and observations
  • Solar software and the use of data archives
  • Propagation of shock waves (theory)
  • Observations of shock waves in the solar corona
  • Solar flares
  • Coronal mass ejections and solar energetic particles (SEPs)
  • The 'quiet Sun': small and large scale solar features
  • Interpretation of observations and analysis: the big issues
  • Solar physics and instrumentation in the future

    Further reading:

    Dulk, G. A.: Radio emission from the sun and stars, Annual review of astronomy and astrophysics, Volume 23, 1985, p. 169-224
    Gary, G. Allen: Plasma Beta above a Solar Active Region: Rethinking the Paradigm, Solar Physics, vol. 203, 2001, p. 71-86
    Klein, K.-L.: Microwave radiation from a dense magneto-active plasma, Astronomy and Astrophysics, vol. 183, 1987, p. 341-350
    Shibasaki, K.; Alissandrakis, C. E.; Pohjolainen, S.: Radio Emission of the Quiet Sun and Active Regions (Invited Review), Solar Physics, Volume 273, 2011, pp. 309-337
    Warmuth, A.: Large-scale Waves and Shocks in the Solar Corona, The High Energy Solar Corona: Waves, Eruptions, Particles, Lecture Notes in Physics, Volume 725, Springer-Verlag, 2007
    Murphy, R.: Exploring Solar Flares with Gamma Rays and Neutrons, 2008 NRL REVIEW
    RHESSI Science Nuggets


    Useful links

    ADS search engine
    The Query Form can be used to search publications by author(s), article title, and abstract keywords. Within utu, full articles of some journals are readable under the unversity library lisence.

    How is the Sun just now? Latest data from different observatories.

    Silja's linklist for solar physicists

    solarstructure.pro



    Rami Vainio: Guest lecture slides from 2009 (pdf)


    Kurssin kuvaus ja esitiedot:

    Kurssi on luennoitu 2002, 2005 ja 2007 suomen kielellä, kurssinimellä Auringon rakenne ja aktiivisuus (XFYS4280). Kurssi soveltuu osaksi syventäviä tai jatko-opintoja. Tästä löydät aikaisempaa kurssimateriaalia suomeksi.

    Sisältö: Auringon rakenne, magnetismi ja tärkeimmät ilmiöt aktiivisuusjakson eri vaiheissa. Erityisesti keskitytään flare-purkauksiin ja koronan massapurkauksiin sekä niihin liittyviin rakenteisiin ja ilmiöihin (esim. filamentit, plasmakaaret, shokkiaallot, aurinkotuuli). Purkausmallien ja uusimpien tutkimustulosten esittely. Käydään läpi tärkeimmät havaintolaitteet eri aallonpituuksilla. Säteilymekanismit ja havaintojen tulkinta. Tehdään harjoitustyö käyttäen Tuorlan aurinkoradioteleskooppia (vain keväisin) tai vaihtoehtoisesti laskuharjoituksia.

    Luentorunko

    Kurssimonisteen pdf-versio keväältä 2007: Koko moniste yhtenä tiedostona, 235 sivua (73MB)
    Sisällysluettelo (220KB); Luku 1 (540KB) ; Luku 2 (12MB) ; Luku 3 (15MB) ; Luku 4 (12MB) ; Luku 5 (2MB) ; Luku 6 (300KB) ; Luku 7 (500KB) ; Luku 8 (6MB) ; Luku 9 (11MB) ; Luku 10 (12MB) ; Luku 11 (320KB) ;



    Auringon rakenne-sivusto

    Aurinkosanastoa-sivusto