摘要
The constraints on tidal deformability Λ of neutron stars were first extracted from GW170817 by LIGO and Virgo Collaborations.However,the relationship between the radius R and tidal deformability Λ is still under debate.Using an isospin-dependent parameterized equation of state(EOS),we study the relation between R andΛand its dependence on parameters of symmetry energy Esym and EOS of symmetric nuclear matter E0 when the mass is fixed at 1.4 M⊙,1.0 M⊙,and 1.8 M⊙.We find that,although the changes of high order parameters of Esym and E 0 can shift individual values of R1.4 and Λ1.4,the R1.4~Λ1.4 relation remains approximately at the same fitted curve.The slope L of the symmetry energy plays the dominant role in determining the R1.4~Λ1.4 relation.By investigating the mass dependence of the R~Λ relation,we find that the well fitted R~Λ relation for 1.4 M⊙ is broken for massive neutron stars.
作者
Nai-Bo Zhang
Bin Qi
Shou-Yu Wang
张乃波;亓斌;王守宇(Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,School of Space Science and Physics,Institute of Space Sciences,Shandong University,Weihai 264209,China)
基金
This work is partly Supported by the Shandong Natural Science Foundation(JQ201701)
the Natural Science Foundation of China(11622540,11675094,11705102,11775133)
the China Postdoctoral Science Foundation(2019M652358)
the Young Scholars Program of Shandong University,Weihai(2015WHWLJH01)
the Fundamental Research Funds of Shandong University(2019ZRJC001)。
