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Assignment 5


  1. Find out the orbital parameters of the planets around PSR B1257+12
  2. Why doesn't PSR B0655+64 follow the core mass radius relation
  3. Estimate the change in the dispersion measure between orbital phases 0.30 and 0.40 for PSR B1957+20 (see the delay curve in the notes). Use your answer to estimate the change in the column density of electrons.
  4. Estimate the orbital velocity of 2 neutron stars in a 2 hour orbit with a radius of 0.5 light seconds.
  5. Evaluate the difference between the semi-major and semi-minor axis for a pulsar orbit that has an ececntricity of .
  6. Describe what would happen, if you were riding a bicycle and tex2html_wrap_inline3920 was large.

Jon Bell
Thu Dec 19 15:15:11 GMT 1996