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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Orbit Averaged Energy Flux - MHar < ˙ E3PN >Mhar = 1 1 − e 2 t 3 (· · · · · ·) BRI-IHP06-I – p.47/??

Comments Note: No term at 2.5PN. 2.5PN contribution is proportional to ˙r and vanishes after averaging since it always includes only ‘odd’ terms. et represents eccentricity in Modified harmonic coordinates e MHar t . x is gauge invariant. No such label is required on it. Important to keep track when comparing formulas in different gauges. Circular orbit limit - setting et = 0, < ˙ E > |⊙ = 32 5 x5 ν 2 x 3 1 + x 1266161801 9979200 − 1247 − 94403 3024 ν2 − 775 324 ν3 35 − 336 12 ν + x 2 − 44711 9072 1712 − 105 ln Gm c2 + − xr0 14930989 272160 9271 65 + ν + 504 18 ν2 Exact agreement with BIJ02 after converting the γ = Gm/c 2 rSHar to the gauge invariant variable x. This is only instantaneous contribution . 41 + 48 π2 − 88 3 BRI-IHP06-I – p.48/??

Comments<br />

Note: No term at 2.5PN. 2.5PN contribution is proportional to ˙r and<br />

vanishes after averag<strong>in</strong>g s<strong>in</strong>ce it always <strong>in</strong>cludes only ‘odd’ terms.<br />

et represents eccentricity <strong>in</strong> Modified harmonic coord<strong>in</strong>ates e MHar<br />

t .<br />

x is gauge <strong>in</strong>variant. No such label is required on it.<br />

Important to keep track when compar<strong>in</strong>g formulas <strong>in</strong> different<br />

gauges.<br />

Circular orbit limit - sett<strong>in</strong>g et = 0,<br />

< ˙<br />

E > |⊙ = 32<br />

5 x5 ν 2<br />

x 3<br />

<br />

1 + x<br />

1266161801<br />

9979200<br />

<br />

− 1247<br />

− 94403<br />

3024 ν2 − 775<br />

324 ν3<br />

<br />

35<br />

−<br />

336 12 ν + x 2<br />

− 44711<br />

9072<br />

1712<br />

−<br />

105 ln<br />

<br />

Gm<br />

c2 <br />

+ −<br />

xr0<br />

14930989<br />

272160<br />

<br />

9271 65<br />

+ ν +<br />

504 18 ν2<br />

Exact agreement with BIJ02 after convert<strong>in</strong>g the γ = Gm/c 2 rSHar to<br />

the gauge <strong>in</strong>variant variable x.<br />

<br />

This is only <strong>in</strong>stantaneous contribution<br />

.<br />

41<br />

+<br />

48 π2 − 88<br />

3<br />

BRI-IHP06-I – p.48/??

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