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Dopple shifts of binary stars

  1. Jan 24, 2008 #1
    hey guys,

    im doing a report on binary stars, using doppler shifts to get some results for periods etc but bit unsure about how to do the errors?

    i realise that the errors arise in the speed of the stars and the dispersion of the photons but how could i calculate this?

    cheers for any help
    x
     
  2. jcsd
  3. Jan 24, 2008 #2

    malawi_glenn

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    Are you familar with the ordninary error-propagation forumula?
     
  4. Jan 24, 2008 #3
    yeh i know a bit about that, (dx/X)^2 and all that?
    how do i calculate the error in dispersion and that tho?
    x
     
  5. Jan 24, 2008 #4

    malawi_glenn

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    http://sosnick.uchicago.edu/propagation_errors.pdf [Broken]

    Look at page 8, and follow that chapter.

    Then you write your formula for Doppler shift as a function of frequency and speed of star. What is the definition of dispersion?
     
    Last edited by a moderator: May 3, 2017
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