Gravitational Waves from Inspiralling Compact Binaries in ... - LUTH

Gravitational Waves from Inspiralling Compact Binaries in ... - LUTH Gravitational Waves from Inspiralling Compact Binaries in ... - LUTH

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20.07.2013 Views

3.5PN accurate reactive dynamics Explicit computations of RHS require only 1PN accurate expressions for the orbital elements because we are trying to obtain the phasing to the 3.5PN order and the reactive dynamics only involves 2.5PN and 3.5PN contributions. BUT, this does not mean that the orbital dynamics is only 1PN accurate. Phasing formalism allows us to impose the fully 1PN accurate reactive dynamics on the 3PN accurate conservative dynamics to provide the 3.5PN accurate phasing BRI-IHP06-I – p.128/??

3.5PN accurate reactive dynamics Finally, the evolution equations for dn/dl, det/dl, dcl/dl, and dcλ/dl in terms of u(l, n, et), n, and et, dn dl = − 8ξ5/3nη 5 6 32 − χ3 ξ7/3 nη −360 + 1176η 35 χ 3 χ4 + 49 − 9e2 t χ5 + 2680 − 11704η − 35(1 − e2 t ) χ6 − − 4012 + 34356η + (36 − 756η)e 2 t χ 4 1470 − 47880η − (350 − 17080η)e 2 t 1 + χ5 1 + χ6 13510 + 31780η − (24220 + 30520η)e 2 t + (10710 − 1260η)e 4 t (27594 + 5880η)(1 − e 2 t )2 χ 8 χ ≡ 1 − et cos u and u = u(l, n, et). + + 11760(1 − e2 t )3 χ 9 , 1 − χ7 BRI-IHP06-I – p.129/??

3.5PN accurate reactive dynamics<br />

Explicit computations of RHS require only 1PN accurate expressions<br />

for the orbital elements because we are try<strong>in</strong>g to obta<strong>in</strong> the phas<strong>in</strong>g<br />

to the 3.5PN order and the reactive dynamics only <strong>in</strong>volves 2.5PN<br />

and 3.5PN contributions.<br />

BUT, this does not mean that the orbital dynamics is only 1PN<br />

accurate. Phas<strong>in</strong>g formalism allows us to impose the fully 1PN<br />

accurate reactive dynamics on the 3PN accurate conservative<br />

dynamics to provide the 3.5PN accurate phas<strong>in</strong>g<br />

BRI-IHP06-I – p.128/??

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