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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FZ flux - Radiative Multipoles Following Thorne (1980), the expression for the 3PN accurate far zone energy flux in terms of symmetric trace-free (STF) radiative multipole moments read as dE dt far−zone = G c5 1 5 (1) (1) U ij U ij + 1 c2 1 189 + 1 c4 1 9072 + 1 c6 1 594000 +O(8) . (1) (1) U ijk U ijk + 16 45 (1) (1) U ijkmU ijkm V (1) ij + 1 84 (1) (1) U ijkmnU ijkmn (1) V ij V (1) ijk (1) V ijk 4 (1) (1) + V ijkmV ijkm 14175 BRI-IHP06-I – p.21/??

PN order of Multipoles For a given PN order only a finite number of Multipoles contribute At a given PN order the mass l-multipole is accompanied by the current l − 1-multipole (Recall EM) To go to a higher PN order Flux requires new higher order l-multipoles and more importantly higher PN accuracy in the known multipoles. 3PN Energy flux requires 3PN accurate Mass Quadrupole, 2PN accurate Mass Octupole, 2PN accurate Current Quadrupole,........ N Mass 2 5 -pole, Current 2 4 -pole BRI-IHP06-I – p.22/??

PN order of Multipoles<br />

For a given PN order only a f<strong>in</strong>ite number of Multipoles<br />

contribute<br />

At a given PN order the mass l-multipole is<br />

accompanied by the current l − 1-multipole (Recall EM)<br />

To go to a higher PN order Flux requires new higher<br />

order l-multipoles and more importantly higher PN<br />

accuracy <strong>in</strong> the known multipoles.<br />

3PN Energy flux requires 3PN accurate Mass<br />

Quadrupole, 2PN accurate Mass Octupole, 2PN<br />

accurate Current Quadrupole,........ N Mass 2 5 -pole,<br />

Current 2 4 -pole<br />

BRI-IHP06-I – p.22/??

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