Impact of Dynamical Tides on the Reconstruction of the Neutron Star Equation of State.

Impact of Dynamical Tides on the Reconstruction of the Neutron Star Equation of State.
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动力潮汐对中子星状态方程重建的影响。

DOI:
10.1103/physrevlett.129.081102
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发表时间:
2022
影响因子:
8.6
通讯作者:
Pratten G
Pratten G
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Pratten G

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螺旋中子星的引力波为我们提供了一个独特的机会来推断超核密度下冷强子物质的状态方程。在螺旋过程中,由于星星对伴星潮汐场的反应,主导物质效应出现,在发出的GW信号中留下特征印记。这种独特的特征使我们能够约束冷中子星星的状态方程。然而,在上述GW频率下,称为动力潮汐的次优势潮汐效应变得重要。在这封信中,我们表明,忽略与基本()模式相关的动力学潮汐效应导致大的系统偏差,在测量的潮汐变形的恒星,因此在推断的中子星星状态方程。重要的是,我们发现模式动力学潮汐已经与Advanced LIGO和Virgo的第五次观测运行相关()-忽略动力学潮汐可能导致中子半径的误差,对状态方程的测量产生巨大影响。我们的研究结果表明,准确建模的次主导潮汐效应超过绝热极限将是至关重要的,在即将到来的GW观测中子星星状态方程的精确测量。
Gravitational waves (GWs) from inspiraling neutron stars afford us a unique opportunity to infer the as-of-yet unknown equation of state of cold hadronic matter at supranuclear densities. During the inspiral, the dominant matter effects arise due to the star’s response to their companion’s tidal field, leaving a characteristic imprint in the emitted GW signal. This unique signature allows us to constrain the cold neutron star equation of state. At GW frequencies above, however, subdominant tidal effects known as dynamical tides become important. In this Letter, we demonstrate that neglecting dynamical tidal effects associated with the fundamental () mode leads to large systematic biases in the measured tidal deformability of the stars and hence in the inferred neutron star equation of state. Importantly, we find that-mode dynamical tides will already be relevant for Advanced LIGO’s and Virgo’s fifth observing run ()—neglecting dynamical tides can lead to errors on the neutron radius of, with dramatic implications for the measurement of the equation of state. Our results demonstrate that the accurate modeling of subdominant tidal effects beyond the adiabatic limit will be crucial to perform accurate measurements of the neutron star equation of state in upcoming GW observations.
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