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Jun 7, 2016 at 19:18 vote accept user3741635
Jun 7, 2016 at 17:54 comment added John Rennie @user3741635: aha, Carroll derives the expression for a unit mass, i.e. $m=1$, so $m$ does not appear in his equation.
Jun 7, 2016 at 17:54 history edited John Rennie CC BY-SA 3.0
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Jun 7, 2016 at 5:01 comment added John Rennie Hmm, yes, OK. I'll have to see if I can dig out a copy of Carroll's book to see exactly what he has derived. The form of $V_\text{eff}$ I've given is the one I was taught, and the one that matches Wikipedia in the limit of $M\gg m$.
Jun 7, 2016 at 4:59 comment added user3741635 Sorry to bother you again John but you said that Carroll gives the potential per unit mass, so to get the potential I need to multiply by $m$ but doing that I get the effective potential as $$ V_{eff}(r) = \frac{1}{2}\epsilon\,m-\frac{GMm}{r} + \frac{m L^2}{2r^2} - \frac{GmML^2}{c^2r^3} \tag{1} $$ If you notice the last two terms are different from the last two term in Eq $(1)$ in you answer. Could you explain this please .
Jun 5, 2016 at 18:56 vote accept user3741635
Jun 7, 2016 at 4:45
Jun 5, 2016 at 18:49 history edited John Rennie CC BY-SA 3.0
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Jun 5, 2016 at 18:39 history answered John Rennie CC BY-SA 3.0