Dark matter
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ASTROID. <Dark Matter>. Lesson Plan Guided Research Model Dr. Christian Reimers [email protected] http://www.virtuelleschule.at/cosmos/. [1]. [2]. [1] Gravitational Lens, HST observation of Abell 2218 [2] Rotation curve (observed and theoretical), SuW 1/2005 S.32ff.

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Dark matter

ASTROID

<Dark Matter>

Lesson PlanGuided ResearchModel

Dr. Christian [email protected]://www.virtuelleschule.at/cosmos/

[1]

[2]

[1] Gravitational Lens, HST observation of Abell 2218

[2] Rotation curve (observed and theoretical), SuW 1/2005 S.32ff.


Dark matter

<Dark Matter>

  • General InformationThe scenario aims to illustrate one of the evidences for dark matter. This includes the study of the rotational curves of spiral galaxies.

    • Duration: 3 x 50 min.

    • Vocabulary: dark matter, galaxies, rotation curve

    • Tools and Materials: PC with Internet connection, Paper, work sheets (excel, diagram), Pencil

    • Aims and Objectives: Students should ...- ... be able to plot data- ... learn basics on the structure and detection of matter

    • Students‘ Misconception:

      - confusing types of matter

      - visible parts of galaxies are dominant


Dark matter

<Dark Matter>

  • Educational Phase 1: Stimulation

    • Presentation/Discussion:motivation by emotion (pictures of galaxies)

[1] HST observation of M51 „Whirlpool Galaxy“[2] HST observation of M104 „Sombrero Galaxy“


Dark matter

<Dark Matter>

  • Educational Phase 2: Scientific Prediction

    • Discuss list of possible dark matter candidates and their interactions with measurable quantities / indirect detection

    • Draw up a list on the blackboard with various proposed methods and missions to detect dark matter

    • Finding pictures of galaxies and their rotation curves(internet research)

[3] Doppler image of M33

[1] Illustration of the galaxies rotation (Sextans A)

[2] Interactive Applet on the Doppler effect


Dark matter

<Dark Matter>

  • Educational Phase 3: Experimental Activities

    • Kepler rotation in the Solar System (central point mass)

    • Applet with M(r) => v(r) [in development]

[1] Work sheet: Kepler rotation in the Solar System

[2] „rotcurve“-Applet of real galaxieshttp://burro.cwru.edu/JavaLab/RotcurveWeb/main.html


Dark matter

<Dark Matter>

  • Educational Phase 4: Abstraction of the finding

    • Prediction Compared to Results:v2(r) = G * (Mvisible(r) + Mdark(r)) / rIf existing matter is only the observed (visible) matter, the rotation curves of spiral galaxies could not be described.Mtot > Mvisible => Mdark thus Mtot = Mvisible + MdarkWith assistance of Tutorials and Links.

    • Discussion: Short discussion on detection methods and theoretical issues.


Dark matter

<Dark Matter>

  • Educational Phase 5: Consolidation

    • Quiz/Multiple-Choice-Test with Feedback

    • Exercises/Tasks:

      • Comparing simple calculations and self-composed diagrams with obtained data

      • Talk: Thoeretical background ist provided to find information on the internet to start a talk about types of dark matter

      • Discussion: Change of paradigm of matter over the centuries

[1] Multiple-Choice-Test (ASTROID)


Dark matter

<Dark Matter>

  • Ressources:

    • Worksheet (solar system; xls)

    • Worksheet (diagram; pdf)

    • Simulation (rotation curve; Applet)

    • Glossary (of related terms; pdf)

    • Examples with solutions and diagrams (for teachers; pdf)

    • Informationsheet (types of matter; pdf)

    • Informationsheet (posibilities of types of DM; pdf)

    • Informationsheet (internetlinks and further infos; pdf)


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