Observability of dynamical tides in merging eccentric neutron star binaries

被引：2

作者：

Takatsy, Janos ^{[1
,2
]}

Kocsis, Bence ^{[3
,4
]}

Kovacs, Peter ^{[5
]}

机构：

[1] Niels Bohr Inst, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

[2] HUN REN Wigner Res Ctr Phys, Inst Particle & Nucl Phys, Konkoly Thege Miklos Ut 29-33, H-1121 Budapest, Hungary

[3] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[4] Univ Oxford, St Hughs Coll, St Margarets Rd, Oxford OX2 6LE, England

[5] HUN REN Wigner Res Ctr Phys, Inst Particle & Nucl Phys, Konkoly Thege Thege Miklos Ut 29-33, H-1121 Budapest, Hungary

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 10期

基金：

英国科学技术设施理事会;

关键词：

BLACK-HOLE MERGERS; EQUATION-OF-STATE; COMPACT-OBJECT BINARIES; GRAVITATIONAL-RADIATION; GALACTIC NUCLEI; TIDAL EXCITATIONS; TWIN STARS; OSCILLATIONS; DENSE; AGN;

D O I：

10.1103/PhysRevD.110.103043

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

While dynamical tides only become relevant during the last couple of orbits for circular inspirals, orbital eccentricity can increase their impact during earlier phases of the inspiral by exciting tidal oscillations at each close encounter. We investigate the effect of dynamical tides on the orbital evolution of eccentric neutron star binaries using post-Newtonian numerical simulations and construct an analytic stochastic model that reproduces the numerical results. Our study reveals a strong dependence of dynamical tides on the pericenter distance, with the fractional energy transferred to dynamical tides over that dissipated in gravitational waves (GWs) exceeding similar to 1% at separations rp 50 km for large eccentricities. We demonstrate that the effect of dynamical tides on orbital evolution can manifest as a phase shift in the GW signal. We show that the signal-to-noise ratio of the GW phase shift can reach the detectability threshold of 8 with a single advanced Laser Interferometer Gravitational Wave Observatory detector at design sensitivity for eccentric neutron star binaries at a distance of 40 Mpc. This requires a pericenter distance of rp0 68 km (rp0 76 km) at binary formation with eccentricity close to 1 for a reasonable tidal deformability and f-mode frequency of 500 and 1.73 kHz (700 and 1.61 kHz), respectively. The observation of the phase shift will enable measuring the f-mode frequency of neutron stars independently from their tidal deformability, providing significant insights into neutron star seismology and the properties of the equation of state. We also explore the potential of distinguishing between equal-radius and twin-star binaries, which could provide an opportunity to reveal strong firstorder phase transitions in the nuclear equation of state.

引用

页数：24

共 151 条

[1]

Abbott A, 2017, NATURE, V551, P425, DOI 10.1038/551425a

[2]

Abbott B., 2017, Phys. Rev. Lett., V119, DOI DOI 10.1103/PHYSREVLETT.119.161101

[3] Observation of Gravitational Waves from a Binary Black Hole Merger [J].

Abbott, B. P. ;

Abbott, R. ;

Abbott, T. D. ;

Abernathy, M. R. ;

Acernese, F. ;

Ackley, K. ;

Adams, C. ;

Adams, T. ;

Addesso, P. ;

Adhikari, R. X. ;

Adya, V. B. ;

Affeldt, C. ;

Agathos, M. ;

Agatsuma, K. ;

Aggarwal, N. ;

Aguiar, O. D. ;

Aiello, L. ;

Ain, A. ;

Ajith, P. ;

Allen, B. ;

Allocca, A. ;

Altin, P. A. ;

Anderson, S. B. ;

Anderson, W. G. ;

Arai, K. ;

Arain, M. A. ;

Araya, M. C. ;

Arceneaux, C. C. ;

Areeda, J. S. ;

Arnaud, N. ;

Arun, K. G. ;

Ascenzi, S. ;

Ashton, G. ;

Ast, M. ;

Aston, S. M. ;

Astone, P. ;

Aufmuth, P. ;

Aulbert, C. ;

Babak, S. ;

Bacon, P. ;

Bader, M. K. M. ;

Baker, P. T. ;

Baldaccini, F. ;

Ballardin, G. ;

Ballmer, S. W. ;

Barayoga, J. C. ;

Barclay, S. E. ;

Barish, B. C. ;

Barker, D. ;

Barone, F. .

PHYSICAL REVIEW LETTERS, 2016, 116 (06)

[4] Multi-messenger Observations of a Binary Neutron Star Merger [J].

Abbott, B. P. ;

Abbott, R. ;

Abbott, T. D. ;

Acernese, F. ;

Ackley, K. ;

Adams, C. ;

Adams, T. ;

Addesso, P. ;

Adhikari, R. X. ;

Adya, V. B. ;

Affeldt, C. ;

Afrough, M. ;

Agarwal, B. ;

Agathos, M. ;

Agatsuma, K. ;

Aggarwal, N. ;

Aguiar, O. D. ;

Aiello, L. ;

Ain, A. ;

Ajith, P. ;

Allen, B. ;

Allen, G. ;

Allocca, A. ;

Altin, P. A. ;

Amato, A. ;

Ananyeva, A. ;

Anderson, S. B. ;

Anderson, W. G. ;

Angelova, S. V. ;

Antier, S. ;

Appert, S. ;

Arai, K. ;

Araya, M. C. ;

Areeda, J. S. ;

Arnaud, N. ;

Arun, K. G. ;

Ascenzi, S. ;

Ashton, G. ;

Ast, M. ;

Aston, S. M. ;

Astone, P. ;

Atallah, D. V. ;

Aufmuth, P. ;

Aulbert, C. ;

AultONeal, K. ;

Austin, C. ;

Avila-Alvarez, A. ;

Babak, S. ;

Bacon, P. ;

Bader, M. K. M. .

ASTROPHYSICAL JOURNAL LETTERS, 2017, 848 (02)

[5] Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A [J].

Abbott, B. P. ;

Abbott, R. ;

Abbott, T. D. ;

Acernese, F. ;

Ackley, K. ;

Adams, C. ;

Adams, T. ;

Addesso, P. ;

Adhikari, R. X. ;

Adya, V. B. ;

Affeldt, C. ;

Afrough, M. ;

Agarwal, B. ;

Agathos, M. ;

Agatsuma, K. ;

Aggarwal, N. ;

Aguiar, O. D. ;

Aiello, L. ;

Ain, A. ;

Ajith, P. ;

Allen, B. ;

Allen, G. ;

Allocca, A. ;

Aloy, M. A. ;

Altin, P. A. ;

Amato, A. ;

Ananyeva, A. ;

Anderson, S. B. ;

Anderson, W. G. ;

Angelova, S. V. ;

Antier, S. ;

Appert, S. ;

Arai, K. ;

Araya, M. C. ;

Areeda, J. S. ;

Arnaud, N. ;

Arun, K. G. ;

Ascenzi, S. ;

Ashton, G. ;

Ast, M. ;

Aston, S. M. ;

Astone, P. ;

Atallah, D. V. ;

Aufmuth, P. ;

Aulbert, C. ;

AultONeal, K. ;

Austin, C. ;

Avila-Alvarez, A. ;

Babak, S. ;

Bacon, P. .

ASTROPHYSICAL JOURNAL LETTERS, 2017, 848 (02)

[6]

Abbott B. P., 2019, Physical Review X, V9, DOI DOI 10.1103/PHYSREVX.9.011001

[7] GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo during the Second Part of the Third Observing Run [J].

Abbott, R. ;

Abbott, T. D. ;

Acernese, F. ;

Ackley, K. ;

Adams, C. ;

Adhikari, N. ;

Adhikari, R. X. ;

Adya, V. B. ;

Affeldt, C. ;

Agarwal, D. ;

Agathos, M. ;

Agatsuma, K. ;

Aggarwal, N. ;

Aguiar, O. D. ;

Aiello, L. ;

Ain, A. ;

Ajith, P. ;

Akcay, S. ;

Akutsu, T. ;

Albanesi, S. ;

Allocca, A. ;

Altin, P. A. ;

Amato, A. ;

Anand, C. ;

Anand, S. ;

Ananyeva, A. ;

Anderson, S. B. ;

Anderson, W. G. ;

Ando, M. ;

Andrade, T. ;

Andres, N. ;

Andric, T. ;

Angelova, S., V ;

Ansoldi, S. ;

Antelis, J. M. ;

Antier, S. ;

Appert, S. ;

Arai, Koji ;

Arai, Koya ;

Arai, Y. ;

Araki, S. ;

Araya, A. ;

Araya, M. C. ;

Areeda, J. S. ;

Arene, M. ;

Aritomi, N. ;

Arnaud, N. ;

Arogeti, M. ;

Aronson, S. M. ;

Arun, K. G. .

PHYSICAL REVIEW X, 2023, 13 (04)

[8] Post-Newtonian spin-tidal couplings for compact binaries [J].

Abdelsalhin, Tiziano ;

Gualtieri, Leonardo ;

Pani, Paolo .

PHYSICAL REVIEW D, 2018, 98 (10)

[9]

Acernese F., 2019, Phys. Rev. Lett., V123

[10] Template bank for gravitational waveforms from coalescing binary black holes:: Nonspinning binaries [J].

Ajith, P. ;

Babak, S. ;

Chen, Y. ;

Hewitson, M. ;

Krishnan, B. ;

Sintes, A. M. ;

Whelan, J. T. ;

Bruegmann, B. ;

Diener, P. ;

Dorband, N. ;

Gonzalez, J. ;

Hannam, M. ;

Husa, S. ;

Pollney, D. ;

Rezzolla, L. ;

Santamaria, L. ;

Sperhake, U. ;

Thornburg, J. .

PHYSICAL REVIEW D, 2008, 77 (10)

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