TY - JOUR
TI - Eccentric, nonspinning, inspiral, Gaussian-process merger approximant for the detection and characterization of eccentric binary black hole mergers
AU - Huerta, E. A.
AU - Moore, C. J.
AU - Kumar, Prayush
AU - George, Daniel
AU - Chua, Alvin J. K.
AU - Haas, Roland
AU - Wessel, Erik
AU - Johnson, Daniel
AU - Glennon, Derek
AU - Rebei, Adam
AU - Holgado, A. Miguel
AU - Gair, Jonathan R.
AU - Pfeiffer, Harald P.
T2 - Physical Review D
AB - We present $\texttt{ENIGMA}$, a time domain, inspiral-merger-ringdown waveform model that describes non-spinning binary black holes systems that evolve on moderately eccentric orbits. The inspiral evolution is described using a consistent combination of post-Newtonian theory, self-force and black hole perturbation theory. Assuming eccentric binaries that circularize prior to coalescence, we smoothly match the eccentric inspiral with a stand-alone, quasi-circular merger, which is constructed using machine learning algorithms that are trained with quasi-circular numerical relativity waveforms. We show that $\texttt{ENIGMA}$ reproduces with excellent accuracy the dynamics of quasi-circular compact binaries. We validate $\texttt{ENIGMA}$ using a set of $\texttt{Einstein Toolkit}$ eccentric numerical relativity waveforms, which describe eccentric binary black hole mergers with mass-ratios between $1 \leq q \leq 5.5$, and eccentricities $e_0 \lesssim 0.2$ ten orbits before merger. We use this model to explore in detail the physics that can be extracted with moderately eccentric, non-spinning binary black hole mergers. We use $\texttt{ENIGMA}$ to show that GW150914, GW151226, GW170104, GW170814 and GW170608 can be effectively recovered with spinning, quasi-circular templates if the eccentricity of these events at a gravitational wave frequency of 10Hz satisfies $e_0\leq \{0.175,\, 0.125,\,0.175,\,0.175,\, 0.125\}$, respectively. We show that if these systems have eccentricities $e_0\sim 0.1$ at a gravitational wave frequency of 10Hz, they can be misclassified as quasi-circular binaries due to parameter space degeneracies between eccentricity and spin corrections. Using our catalog of eccentric numerical relativity simulations, we discuss the importance of including higher-order waveform multipoles in gravitational wave searches of eccentric binary black hole mergers.
DA - 2018/01/24/
PY - 2018
DO - 10.1103/PhysRevD.97.024031
DP - arXiv.org
VL - 97
IS - 2
SN - 2470-0010, 2470-0029
UR - http://arxiv.org/abs/1711.06276
Y2 - 2018/07/08/18:57:27
KW - Astrophysics - Cosmology and Nongalactic Astrophysics
KW - Astrophysics - High Energy Astrophysical Phenomena
KW - Computer Science - Computational Engineering, Finance, and Science
KW - General Relativity and Quantum Cosmology
KW - J.2
ER -