Interstellar Medium

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Questions in this category have been asked by PJ

  • What is the ISM composed of? Make a list...
  • What are the densities and temperatures?
  • What are the heating and cooling mechanisms involved?
  • What is the geometry and composition of the Milky Way?
  • Given that you are looking through the galaxy at a distant source, what observational effects can you expect to see in the optical? Radio? IR? X-ray?
  • What is the Stromgren Radius? How does it scale with Luminosity and number density? (SR)