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ASTROID. &lt;Dark Matter&gt;. 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.

slide2

<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

slide3

<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“

slide4

<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

slide5

<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

slide6

<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.
slide7

<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)

slide8

<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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