Clusters

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Questions in this category have been asked by

  • How can you tell the mass and age of a cluster?
  • Draw an HR diagram for a globular cluster
  • What is pleides? What is its mass?
  • Tell me about globular clusters in a Galaxy. (SR)
    • Mass, Number of Stars, Spatial Distribution in a galaxy, Typical Ages, Number in the Milky Way and in M87...
  • What is the Spitzer instability? (SR)]

Galaxy clusters:

  • What are typical temperatures of the gas in a galaxy cluster?
    • How do we know this?/What is the emission mechanism?
    • What if the gas were instead approximately 10 to 100 K cooler. What would the main emission mechanism be then?


Astrophysics