Abstract Details
| Name: Ajit kumar Mehta Affiliation: ICTS TIFR Conference ID: ASI2016_641 Title : Frequency-domain post-Newtonian templates for gravitational waves from inspiralling compact binaries with generic spins Authors and Co-Authors : Avinash, P. Ajith Abstract Type : Reject Abstract Category : General Relativity and Cosmology Abstract : Astrophysical black holes are expected to have significant spins. If the spins are misaligned with the orbital angular momentum, the general-relativistic “spin-orbit†and “spin-spin†coupling will cause the spins to precess, which will introduce significant complexity in the observed gravitational-wave (GW) signal. In the adiabatic post-Newtonian approximation, the expected GW signals are typically computed by solving a set of 11 (or more) coupled ordinary differential equations that describe the time evolution of the spin and angular momentum vectors as well as the orbital frequency and phase. For the purpose of GW detection and parameter estimation, the Fourier transform of these waveforms are computed by means of Fast Fourier Transform algorithms. In this work, we present a semi-analytic frequency-domain post-Newtonian waveform family for generic spinning binaries. The evolution of spin and angular momentum vectors are computed by solving 6 ordinary differential equations in the frequency domain. Waveforms in the frequency domain are then computed using a variant of the stationary phase approximation. This provides a computationally efficient method for generating Fourier-domain templates for generic spinning binaries for GW detection and parameter estimation. |