1. Digital Demo RoomStellar Structure and Evolution By Jake Simon and Charles Hansen Supervised by Professor Charles Gammie and Graduate Student Eric Engelhard The DDR-SSE Website http://rainman.physics.uiuc.edu/ddr/stellar

2. Overview • Purpose • Hertzsprung-Russell diagrams • Movie format • Stellar evolution • Initial mass function

3. Purpose • Visualize stellar evolution • Animated Hertzsprung-Russell diagram • Accurate physics • Education • To use in classrooms • Customizable from web • Different complexity levels for different education levels

4. Hertzsprung-Russell Diagrams • Luminosity vs. surface temperature • Main sequence (blue) • Red giant and supergiant (red) • White dwarf (white) or neutron star (shaded) or black hole Log(L) Log(T) HR Diagram with star types indicated

5. Movie Format • Animated HR diagrams • Limits of graph • Surface temperature: 10^(2.9) – 10^(4.9) K • Luminosity: 10^(-5) – 10^(6.2) Lo • Star color • Single star • Radius • Rotation

6. Life of Stars • Main sequence • Hertzsprung gap or subgiant branch • Giant branch • Horizontal branch • Asymptotic giant branch

7. Death of Stars • Planetary Nebulae (mass < 8 Mo) • Helium white dwarfs • Carbon/Oxygen white dwarfs • Supernovae (mass > 8 Mo) • Neutron stars • Black holes

8. Initial Mass Function

9. Summary • Educational simulation • Animated HR diagram • Surface temperature, luminosity, radius, rotation • Visualizes stages of stellar evolution

10. Questions or Comments? Contact Information Charles Hansen – chansen@uiuc.edu Jake Simon – jbsimon@uiuc.edu Professor Gammie – 235 LLP