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Consistency of post-newtonian waveforms with numerical relativity (Document No: 20070021520)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Baker, John G. McWilliams, Sean T. vanMeter, James R. Centrella, Joan Kelly, Bernard J. |
| Copyright Year | 2007 |
| Description | General relativity predicts the gravitational radiation signatures of mergers of compact binaries,such as coalescing binary black hole systems. Derivations of waveform predictions for such systems are required for optimal scientific analysis of observational gravitational wave data, and have so far been achieved primarily with the aid of the post-Newtonian (PN) approximation. The quaIity of this treatment is unclear, however, for the important late inspiral portion. We derive late-inspiral wave forms via a complementary approach, direct numerical simulation of Einstein's equations, which has recently matured sufficiently for such applications. We compare waveform phasing from simulations covering the last approximately 14 cycles of gravitational radiation from an equal-mass binary system of nonspinning black holes with corresponding 3PN and 3.5PN waveforms. We find phasing agreement consistent with internal error estimates based in either approach, at the level of one radian over approximately 10 cycles. The result suggests that PN waveforms for this system are effective roughly until the system reaches its last stable orbit just prior to the final merger. |
| File Size | 567484 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070021520 |
| Archival Resource Key | ark:/13960/t2q57k966 |
| Language | English |
| Publisher Date | 2007-01-11 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Direct Numerical Simulation Binary Stars Gravitational Waves Gravitational Binding Energy Relativity Waveforms Black Holes Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
