论文标题
看看第一原则的哈勃速度
A look at the Hubble speed from first principles
论文作者
论文摘要
我们引入了一种新颖的方式，可以从独立的几何数据集的组合中测量$ H_0 $，而无需校准或选择宇宙学模型。我们建立在{\ it距离二元关系}的基础上，该}将光度和角直径距离的比率设置为具有标准光子传播的任何重力理论，并构成了描述我们宇宙的任何理论的基础。我们的方法提供了从第一原理中确定$ H_0 $的前所未有的可能性，从校准和假设释放了对宇宙学模型的测量。我们发现$ h_0 = 69.5 \ pm 1.7 $ km/s/mpc $ 68 \％$ c.l.表明哈勃常数可以以最小的假设来限制百分比水平。
We introduce a novel way of measuring $H_0$ from a combination of independent geometrical datasets, with no need of calibration nor of the choice of a cosmological model. We build on the {\it distance duality relation} which sets the ratio of the luminosity and angular diameter distance to a fixed scaling in redshift for any metric theory of gravity with standard photon propagation and constitutes a founding block of any theory describing our Universe. Our method provides the unprecedented possibility of determining $H_0$ from first principles, unleashing the measurement of this fundamental constant from calibration and assumption of a cosmological model. We find $H_0=69.5 \pm 1.7$ km/s/Mpc at $68\%$ C.L. showing that the Hubble constant can be constrained at percent level with minimal assumptions.
