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We constrain the nuclear matter equation of state by including the isoscalar-vector and isovector-vector coupling using the Bayesian approach. We used the recent observation GW190814 (R. Abbott et al. 2020 ApJL 896 L44) for the compact star of mass 2.5 M \(_{\odot } \) along with the nuclear saturation properties for the finite and infinite nuclear matter properties at saturation and supra-saturation. Here we see that the cross-coupling between the isocalar-vector and isovector-vector is more effective in reaching such a high mass of compact star. We use FSUGold and IUFSU parameters as the references of our present analysis and finally, we discuss the effects of such coupling on the non-radial oscillations of neutron stars.

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Constraining the Neutron Star Equation of State by Including the Isoscalar-Vector and Isovector-Vector Coupling Using the Bayesian Approach

  • 会议论文

  • 发表日期：

    2025年

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  • Deepak Kumar,
  • Pradip Kumar Sahu

摘要

We constrain the nuclear matter equation of state by including the isoscalar-vector and isovector-vector coupling using the Bayesian approach. We used the recent observation GW190814 (R. Abbott et al. 2020 ApJL 896 L44) for the compact star of mass 2.5 M \(_{\odot } \) along with the nuclear saturation properties for the finite and infinite nuclear matter properties at saturation and supra-saturation. Here we see that the cross-coupling between the isocalar-vector and isovector-vector is more effective in reaching such a high mass of compact star. We use FSUGold and IUFSU parameters as the references of our present analysis and finally, we discuss the effects of such coupling on the non-radial oscillations of neutron stars.