Gravitational wave signatures of highly compact boson star binaries

被引：121

作者：

Palenzuela, Carlos ^{[1
,2
,3
]}

Pani, Paolo ^{[4
,5
]}

Bezares, Miguel ^{[1
,2
,3
]}

Cardoso, Vitor ^{[6
,7
,8
]}

Lehner, Luis ^{[7
]}

Liebling, Steven ^{[9
]}

机构：

[1] Univ Illes Balears, Dept Fis, E-07122 Palma De Mallorca, Baleares, Spain

[2] Univ Illes Balears, IAC3, E-07122 Palma De Mallorca, Baleares, Spain

[3] Inst Estudis Espacials Catalunya, E-07122 Palma De Mallorca, Baleares, Spain

[4] Sapienza Univ Roma, Dipartimento Fis, PA Moro 5, I-00185 Rome, Italy

[5] Sez INFN Roma1, PA Moro 5, I-00185 Rome, Italy

[6] UL, IST, CENTRA, Dept Fis, Ave Rovisco Pais 1, P-1049 Lisbon, Portugal

[7] Perimeter Inst Theoret Phys, 31 Caroline St North, Waterloo, ON N2L 2Y5, Canada

[8] CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland

[9] Long Isl Univ, New York, NY 11548 USA

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 10期

基金：

加拿大自然科学与工程研究理事会; 欧盟地平线“2020”; 美国国家科学基金会;

关键词：

BLACK-HOLES; RELATIVITY;

D O I：

10.1103/PhysRevD.96.104058

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Solitonic boson stars are stable objects made of a complex scalar field with a compactness that can reach values comparable to that of neutron stars. A recent study of the collision of identical boson stars produced only nonrotating boson stars or black holes, suggesting that rotating boson stars may not form from binary mergers. Here we extend this study to include an analysis of the gravitational waves radiated during the coalescence of such a binary, which is crucial to distinguish these events from other binaries with LIGO and Virgo observations. Our studies reveal that the remnant's gravitational wave signature is mainly governed by its fundamental frequency as it settles down to a nonrotating boson star, emitting significant gravitational radiation during this post-merger state. We calculate how the waveforms and their post-merger frequencies depend on the compactness of the initial boson stars and estimate analytically the amount of energy radiated after the merger.

引用

页数：17

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