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首页> 外文期刊>European physical journal >Massive scalar counterpart of gravitational waves in scalarized neutron star binaries
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Massive scalar counterpart of gravitational waves in scalarized neutron star binaries

机译：标量中子星双星中引力波的大规模标量对应物

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摘要

In analogy with spontaneous magnetization of ferromagnets below the Curie temperature, a neutron star (NS), with a compactness above a certain critical value, may undergo spontaneous scalarization and exhibit an interior nontrivial scalar configuration. Consequently, the exterior spacetime is changed, and an external scalar field appears, which subsequently triggers a scalarization of its companion. The dynamical interplay produces a gravitational scalar counterpart of tensor gravitational waves. In this paper, we resort to scalar–tensor theory and demonstrate that the gravitational scalar counterpart from a double neutron star (DNS) and a neutron star–white dwarf (NS-WD) system become massive. We report that (1) a gravitational scalar background field, arising from convergence of external scalar fields, plays the role of gravitational scalar counterpart in scalarized DNS binary, and the appearance of a mass-dimensional constant in a Higgs-like gravitational scalar potential is responsible for a massive gravitational scalar counterpart with a mass of the order of the Planck scale; (2) a dipolar gravitational scalar radiated field, resulting from differing binding energies of NS and WD, plays the role of a gravitational scalar counterpart in scalarized orbital shrinking NS-WDs, which oscillates around a local and scalar-energy-density-dependent minimum of the gravitational scalar potential and obtains a mass of the order of about (10^{-21},{ ext {eV/c}}^2).
机译：类似于居里温度以下的铁磁体的自发磁化，具有高于某个临界值的致密性的中子星（NS）可能会自发标量化并表现出内部非平凡标量配置。因此，外部时空发生了变化，并且出现了一个外部标量场，随后触发了其同伴的标量化。动态相互作用产生张量引力波的引力标量对应物。在本文中，我们诉诸标量张量理论，并证明了来自双中子星（DNS）和中子星白矮星（NS-WD）系统的引力标量对应物变得庞大。我们报告（1）由外部标量场的收敛引起的引力标量背景场在标量DNS二进制中起着引力标量对应物的作用，并且在类似于希格斯的引力标量势中出现了质量维常数负责质量约为普朗克规模的引力标量对应物; （2）由NS和WD的不同结合能产生的偶极重力标量辐射场在标定轨道收缩的NS-WDs中起重力标量对应物的作用，它在局部和标量能量密度相关的最小值附近振荡的重力标量势，得到约（10 ^ {-21}，{ext {eV / c}} ^ 2）的质量。

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