论文标题
GW190412作为二进制黑洞合并的替代解释，迅速旋转
An alternative interpretation of GW190412 as a binary black hole merger with a rapidly spinning secondary
论文作者
论文摘要
Ligo-Virgo的合作最近报道了GW190412的特性，GW190412是一种具有不平等组分质量的二进制黑洞合并（质量比$ 0.25^{+0.06} _ { - 0.04} $，当使用EOBNR PHM近似值时），并且有效地旋转了或有效地旋转或有效地旋转或有效地旋转或具有或有效地旋转或具有或有效地旋转。他们使用非信息先验来推断，以90 \％的置信度更大的黑洞在0.17至0.59之间具有无尺寸的旋转幅度。我们认为，在孤立的二进制进化的背景下，更自然地假设先验的，更巨大的黑洞具有可忽略的旋转，而如果潮汐被潮汐旋转，那么较小的黑洞的自旋优先与轨道角动量对齐。在这一以天体物理动机为先验的情况下，我们得出结论，较低的黑洞沿轨道角动量在0.64和0.99之间具有无量纲的自旋成分。
The LIGO-Virgo collaboration recently reported the properties of GW190412, a binary black hole merger with unequal component masses (mass ratio $0.25^{+0.06}_{-0.04}$ when using the EOBNR PHM approximant) and a non-vanishing effective spin aligned with the orbital angular momentum. They used uninformative priors to infer that the more massive black hole had a dimensionless spin magnitude between 0.17 and 0.59 at 90\% confidence. We argue that, within the context of isolated binary evolution, it is more natural to assume a priori that the first-born, more massive black hole has a negligible spin, while the spin of the less massive black hole is preferentially aligned with the orbital angular momentum if it is spun up by tides. Under this astrophysically motivated prior, we conclude that the lower mass black hole had a dimensionless spin component between 0.64 and 0.99 along the orbital angular momentum.
