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in MTW Ex 19.1, it was considered a Weakly gravitating body whereas in Ex 19.3, a Stationary relativistic source.

What relativistic means here ? does it mean the source is very dense and massive ? or does it mean it is rotating at near the speed of light ?

Can I specify the mass as the mass times Gamma ? where Gamma is 1/sqrt (1-vv)

I need to find the non linear term which results from the Mass-energy which in this case no longer is the integral of the density , but rather a relativistic mass.

Is this correct ? MTW mentions that we should consider a keplrian mass !! or did I misunderstood ?

Please clarify

Thanks,

cheers,

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# MTW, Chap19, Stationary relativistic Vs Weakly gravitating source

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