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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3PN generalised Quasi-Keplerian reprn r = ar (1 − er cos u) , l ≡ n (t − t0) = u − et sin u + f4t + c4 f6t + c6 2 π Φ (φ − φ0) = V + f4φ f6φ + c4 c6 + i6φ h6φ sin 4V + c6 1 + eφ where, V = 2 arctan 1 − eφ Details: Schäfer’s Lectures g4t g6t + c4 c6 sin V + i6t c sin 2V + c 6 sin 5V , 1/2 (V − u) 6 sin 2 V + h6t tan u 2 g4φ g6φ + c4 c6 . sin 3 V , c6 sin 3V BRI-IHP06-I – p.37/??

3PN generalised Quasi-Keplerian reprn V is the 3PN generalisation of the Keplerian true anomaly. ar, er, l, u, n, et, eφ and 2π/Φ are some 3PN accurate semi-major axis, radial eccentricity, mean anomaly, eccentric anomaly, mean motion, ‘time’ eccentricity, angular eccentricity and angle of advance of periastron per orbital revolution respectively. Eqns contain three kinds of ‘eccentricities’ et, er and eφ labelled after the coordinates t, r, and φ respectively. Differ from each other starting at the 1PN order. Φ/2π ≡ K = 1 + k Presense of log terms in Std Harmonic coords obstructs the construction of GQKR which crucially exploits the fact that at order 3PN the radial equation is a fourth order polynomial in 1/r. MGS04 thus construct the GQKR for Modified Harmonic coords. GQKR in Modified Harmonic coords is of the same form as for ADM but the corresponding eqns for the orbital elements are different. BRI-IHP06-I – p.38/??

3PN generalised Quasi-Keplerian reprn<br />

V is the 3PN generalisation of the Keplerian true anomaly.<br />

ar, er, l, u, n, et, eφ and 2π/Φ are some 3PN accurate semi-major<br />

axis, radial eccentricity, mean anomaly, eccentric anomaly, mean<br />

motion, ‘time’ eccentricity, angular eccentricity and angle of<br />

advance of periastron per orbital revolution respectively.<br />

Eqns conta<strong>in</strong> three k<strong>in</strong>ds of ‘eccentricities’ et, er and eφ labelled<br />

after the coord<strong>in</strong>ates t, r, and φ respectively. Differ <strong>from</strong> each other<br />

start<strong>in</strong>g at the 1PN order.<br />

Φ/2π ≡ K = 1 + k<br />

Presense of log terms <strong>in</strong> Std Harmonic coords obstructs the<br />

construction of GQKR which crucially exploits the fact that at order<br />

3PN the radial equation is a fourth order polynomial <strong>in</strong> 1/r.<br />

MGS04 thus construct the GQKR for Modified Harmonic coords.<br />

GQKR <strong>in</strong> Modified Harmonic coords is of the same form as for ADM<br />

but the correspond<strong>in</strong>g eqns for the orbital elements are different.<br />

BRI-IHP06-I – p.38/??

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