Prototype effective-one-body model for nonprecessing spinning inspiral-merger-ringdown waveforms

被引：194

作者：

Taracchini, Andrea ^{[1
,2
]}

Pan, Yi ^{[1
,2
]}

Buonanno, Alessandra ^{[1
,2
,3
]}

Barausse, Enrico ^{[1
,2
,4
]}

Boyle, Michael ^{[5
]}

Chu, Tony ^{[6
]}

Lovelace, Geoffrey ^{[5
]}

Pfeiffer, Harald P. ^{[6
]}

Scheel, Mark A. ^{[7
]}

机构：

[1] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA

[2] Univ Maryland, Dept Phys, Joint Space Sci Inst, College Pk, MD 20742 USA

[3] Harvard Univ, Radcliffe Inst Adv Study, Cambridge, MA 02138 USA

[4] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[5] Cornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853 USA

[6] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada

[7] CALTECH, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 02期

基金：

美国国家科学基金会;

关键词：

GRAVITATIONAL-RADIATION; BLACK-HOLES;

D O I：

10.1103/PhysRevD.86.024011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This paper presents a tunable effective-one-body (EOB) model for black- hole (BH) binaries of arbitrary mass ratio and aligned spins. This new EOB model incorporates recent results of small-mass-ratio simulations based on Teukolsky's perturbative formalism. The free parameters of the model are calibrated to numerical-relativity simulations of nonspinning BH-BH systems of five different mass ratios and to equal-mass nonprecessing BH-BH systems with dimensionless BH spins chi(i) similar or equal to +/- 0.44. The present analysis focuses on the orbital dynamics of the resulting EOB model, and on the dominant (l,m) = (2, 2) gravitational-wave mode. The calibrated EOB model can generate inspiral-merger-ringdown waveforms for nonprecessing, spinning BH binaries with any mass ratio and with individual BH spins -1 <= chi(i) less than or similar to 0.7. Extremizing only over time and phase shifts, the calibrated EOB model has overlaps larger than 0.997 with each of the seven numerical-relativity waveforms for total masses between 20M(circle dot) and 200M(circle dot), using the Advanced LIGO noise curve. We compare the calibrated EOB model with two additional equal-mass highly spinning (chi(i) similar or equal to -0.95, +0.97) numerical-relativity waveforms, which were not used during calibration. We find that the calibrated model has an overlap larger than 0.995 with the simulation with nearly extremal antialigned spins. Extension of this model to black holes with aligned spins chi(i) greater than or similar to 0.7 requires improvements of our modeling of the plunge dynamics and inclusion of higher-order PN spin terms in the gravitational-wave modes and radiation-reaction force.

引用

页数：20

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