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Single-Particle Electrodynamics - Assassination Science

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+ 25<br />

48 r4 d ˙v2 (n d·¨v) + 1 6 r4 d (n d· ˙v)(n d·... v) + 5 6 r4 d (n d· ˙v)( ˙v·¨v)<br />

+ 7 16 r4 d (n d· ˙v) 2 (n d·¨v) + 5 24 r3 d r s ˙v 2 (n s·¨v) + 1<br />

12 r3 d r s (n d· ˙v)(n s·... v)<br />

+ 1 4 r3 d r s (n d· ˙v) 2 (n s·¨v) + 3 8 r3 d r s (n d· ˙v) 3 (n s· ˙v) + 1 4 r3 d r s (n d·¨v)(n s·¨v)<br />

+ 1 4 r3 d r s (n d·... v)(n s· ˙v) + 5 8 r3 d r s (n s· ˙v)( ˙v·¨v) + 7 4 r3 d r s ˙v 2 (n d· ˙v)(n s· ˙v)<br />

+ 3 4 r3 d r s (n d· ˙v)(n d·¨v)(n s· ˙v) + 3 8 r2 d r 2 s ˙v2 (n s· ˙v) 2<br />

+ 3 8 r2 d r 2 s (n d· ˙v) 2 (n s· ˙v) 2 + 3 8 r2 d r 2 s (n d·¨v)(n s· ˙v) 2<br />

+ 3 8 r2 d r 2 s (n d· ˙v)(n s· ˙v)(n s·¨v) + 1 8 r dr 3 s (n d· ˙v)(n s· ˙v) 3 + O(ε 5 ). (G.52)<br />

G.6.15<br />

Final redshift expression<br />

Finally, we write the redshift factor λ of (G.27) in terms of r d , n d , r s and n s :<br />

λ = 1 + 1 2 r d(n d· ˙v) + 1 2 r s(n s· ˙v).<br />

(G.53)<br />

G.6.16<br />

Spin of each constituent<br />

The three-spin of the centre of the body, σ, has, by definition, the parametrisation<br />

σ(t) = σ + t ˙σ + 1 2 t2 ¨σ + 1 6 t3 ...<br />

σ + 1<br />

24 t4 ....<br />

σ + O(ε 5 ).<br />

Using t(τ) from (G.14), we find<br />

σ(τ) = σ + τ ˙σ + 1 2 τ 2 ¨σ + 1 6 τ 3 ...<br />

σ + 1 6 τ 3 ˙v 2 ˙σ + 1 24 τ 4 ....<br />

σ + 1 6 τ 4 ˙v 2 ¨σ<br />

(G.54)<br />

+ 1 8 τ 4 ( ˙v·¨v) ˙σ + O(ε 5 ). (G.55)<br />

Now, the three-spin σ r (τ) for any constituent r at body proper-time τ is<br />

equal to that of the body as a whole, viz.,<br />

σ r (τ) ≡ σ(τ).<br />

(G.56)<br />

463

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