论文标题
Ab-Initio QCD计算会影响状态的中子巨星方程的推断
Ab-initio QCD calculations impact the inference of the neutron-star-matter equation of state
论文作者
论文摘要
我们证明，高密度的QCD中的Ab-Initio计算提供了有关中子恒星核心物质方程的重要和非平凡的信息，这超出了目前的天体物理观察值的范围。我们这样做是通过使用高斯过程将状态方程式推断到中子星的密度，并通过天体物理观测和QCD输入顺序调节它。使用我们最近的工作，强加后者不需要外推到渐近高密度。我们发现QCD输入与天体物理观测值互补，在中子恒星的核心中达到的最高密度可提供强大的额外限制。使用QCD输入，状态方程不再在任何密度下统治。 QCD输入降低了高密度下的声音的压力和速度，它预测，相等质量的中子星的二进制碰撞将产生一个大于$ 95 \％$ $（$ 68 \％\％$）的黑洞，以$ m \ ge Q Q Q Q Q Q Q Q Q Q Q Q.1.38 m_ \ odot $（$ M \ geq 1.25 m_ \ odot $）。我们提供QCD可能性函数的Python实现，以便在其他推理设置中方便地使用。
We demonstrate that ab-initio calculations in QCD at high densities offer significant and nontrivial information about the equation of state of matter in the cores of neutron stars, going beyond that which is obtainable from current astrophysical observations. We do so by extrapolating the equation of state to neutron-star densities using a Gaussian process and conditioning it sequentially with astrophysical observations and QCD input. Using our recent work, imposing the latter does not require an extrapolation to asymptotically high density. We find the QCD input to be complementary to the astrophysical observations, offering strong additional constraints at the highest densities reached in the cores of neutron stars; with the QCD input, the equation of state is no longer prior dominated at any density. The QCD input reduces the pressure and speed of sound at high densities, and it predicts that binary collisions of equal-mass neutron stars will produce a black hole with greater than $95\%$ ($68\%$) credence for masses $M \geq 1.38 M_\odot$ ($M \geq 1.25 M_\odot$). We provide a Python implementation of the QCD likelihood function so that it can be conveniently used within other inference setups.
