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Lab 9 – Ages and Distances to Clusters

Lab 9 – Ages and Distances to Clusters. Stars in a Cluster Common Properties Distance Age Chemical composition Different Properties Spectral Types (temperature) Luminosity Class (size) Mass. Interstellar Dust Reddens Light (makes stars appear cooler)

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Lab 9 – Ages and Distances to Clusters

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  1. Lab 9 – Ages and Distances to Clusters

  2. Stars in a Cluster • Common Properties • Distance • Age • Chemical composition • Different Properties • Spectral Types (temperature) • Luminosity Class (size) • Mass

  3. Interstellar Dust • Reddens Light (makes stars appear cooler) • Dims Light (makes stars appear further away)

  4. NGC 2264 - Young Cluster distance - 2,600 ly age - 2 million years

  5. Pleiades - Open Cluster

  6. M3 - Globular Cluster distance - 32,000 ly age - 10 billion years old

  7. 5.55 420 0.15 0.05 -0.1 M45 5.7 138 129 5x107

  8. The End.

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