Modeling the Complete Gravitational Wave Spectrum of Neutron Star Mergers

被引：190

作者：

Bernuzzi, Sebastiano ^{[1
,2
,3
]}

Dietrich, Tim ^{[4
]}

Nagar, Alessandro ^{[5
]}

机构：

[1] CALTECH, TAPIR, Pasadena, CA 91125 USA

[2] Univ Parma, DiFeST, I-43124 Parma, Italy

[3] INFN Parma, I-43124 Parma, Italy

[4] Univ Jena, Inst Theoret Phys, D-07743 Jena, Germany

[5] Inst Hautes Etud Sci, F-91440 Bures Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 09期

基金：

美国国家科学基金会;

关键词：

Equations of state - Merging - Gravitational effects - Neutrons - Stars - Mergers and acquisitions;

D O I：

10.1103/PhysRevLett.115.091101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the context of neutron star mergers, we study the gravitational wave spectrum of the merger remnant using numerical relativity simulations. Postmerger spectra are characterized by a main peak frequency f(2) related to the particular structure and dynamics of the remnant hot hypermassive neutron star. We show that f(2) is correlated with the tidal coupling constant kappa(T)(2) that characterizes the binary tidal interactions during the late-inspiral merger. The relation f(2)(kappa(T)(2)) depends very weakly on the binary total mass, mass ratio, equation of state, and thermal effects. This observation opens up the possibility of developing a model of the gravitational spectrum of every merger unifying the late-inspiral and postmerger descriptions.

引用

页数：5

共 45 条

[1] Constraining the neutron star equation of state with gravitational wave signals from coalescing binary neutron stars [J].

Agathos, M. ;

Meidam, J. ;

Del Pozzo, W. ;

Li, T. G. F. ;

Tompitak, M. ;

Veitch, J. ;

Vitale, S. ;

Van Den Broeck, C. .

PHYSICAL REVIEW D, 2015, 92 (02)

[2] On the maximum mass of differentially rotating neutron stars [J].

Baumgarte, TW ;

Shapiro, SL ;

Shibata, M .

ASTROPHYSICAL JOURNAL, 2000, 528 (01) :L29-L32

[3] Unified picture of the post-merger dynamics and gravitational wave emission in neutron star mergers [J].

Bauswein, A. ;

Stergioulas, N. .

PHYSICAL REVIEW D, 2015, 91 (12)

[4] Revealing the high-density equation of state through binary neutron star mergers [J].

Bauswein, A. ;

Stergioulas, N. ;

Janka, H. -T. .

PHYSICAL REVIEW D, 2014, 90 (02)

[5] Prompt Merger Collapse and the Maximum Mass of Neutron Stars [J].

Bauswein, A. ;

Baumgarte, T. W. ;

Janka, H. -T. .

PHYSICAL REVIEW LETTERS, 2013, 111 (13)

[6] Equation-of-state dependence of the gravitational-wave signal from the ring-down phase of neutron-star mergers [J].

Bauswein, A. ;

Janka, H. -T. ;

Hebeler, K. ;

Schwenk, A. .

PHYSICAL REVIEW D, 2012, 86 (06)

[7] Measuring Neutron-Star Properties via Gravitational Waves from Neutron-Star Mergers [J].

Bauswein, A. ;

Janka, H. -T. .

PHYSICAL REVIEW LETTERS, 2012, 108 (01)

[8] Testing approximations of thermal effects in neutron star merger simulations [J].

Bauswein, A. ;

Janka, H-T. ;

Oechslin, R. .

PHYSICAL REVIEW D, 2010, 82 (08)

[9] Modeling the Dynamics of Tidally Interacting Binary Neutron Stars up to the Merger [J].

Bernuzzi, Sebastiano ;

Nagar, Alessandro ;

Dietrich, Tim ;

Damour, Thibault .

PHYSICAL REVIEW LETTERS, 2015, 114 (16)

[10] Quasiuniversal Properties of Neutron Star Mergers [J].

Bernuzzi, Sebastiano ;

Nagar, Alessandro ;

Balmelli, Simone ;

Dietrich, Tim ;

Ujevic, Maximiliano .

PHYSICAL REVIEW LETTERS, 2014, 112 (20)

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