Tides in merging neutron stars: Consistency of the GW170817 event with experimental data on finite nuclei

被引:35
作者
Malik, Tuhin [1 ]
Agrawal, B. K. [2 ,3 ]
De, J. N. [2 ]
Samaddar, S. K. [2 ]
Providencia, C. [4 ]
Mondal, C. [5 ,6 ]
Jha, T. K. [1 ]
机构
[1] BITS Pilani, Dept Phys, KK Birla Goa Campus, Pilani 403726, Goa, India
[2] Saha Inst Nucl Phys, 1-AF Bidhannagar, Kolkata 700064, India
[3] Homi Bhabha Natl Inst, Anushakti Nagar, Mumbai 400094, Maharashtra, India
[4] Univ Coimbra, Dept Phys, CFisUC, P-3004516 Coimbra, Portugal
[5] Univ Barcelona, Dept Fis Quant & Astrofis, Fac Fis, Marti I Franques 1, E-08028 Barcelona, Spain
[6] Univ Barcelona, Inst Ciencies Cosmos, Fac Fis, Marti I Franques 1, E-08028 Barcelona, Spain
关键词
EQUATION-OF-STATE; DENSITY; MATTER;
D O I
10.1103/PhysRevC.99.052801
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The agreement of the nuclear equation of state (EOS) deduced from the GW170817-based tidal deformability with the one obtained from empirical data on microscopic nuclei is examined. It is found that suitably chosen experimental data on isoscalar and isovector modes of nuclear excitations together with the observed maximum neutron star mass constrain the EOS which displays a very good congruence with the GW170817 inspired one. The giant resonances in nuclei are found to be instrumental in limiting the tidal deformability parameter and the radius of a neutron star in somewhat narrower bounds. At the 1 sigma level, the values of the canonical tidal deformability Lambda(1.4) and the neutron star radius R-1.4 come out to be 267 +/- 144 and 11.6 +/- 1.0 km, respectively.
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页数:6
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