超大黑洞被發現，質量超過400億個太陽

Black holes can get pretty big, but there's a special class that is the biggest of the big, absolute yawning monster black holes.
黑洞可能會很大，但有一種特殊的黑洞，它是那些就像張着大嘴的怪物一般的黑洞中最大的。
And astronomers seem to have found an absolute specimen, clocking in at 40 billion times the mass of the Sun.
天文學家似乎發現了這樣的一個黑洞，它達到了太陽質量的400億倍大。
It's at the centre of a galaxy called Holmberg 15A, a supergiant elliptical galaxy around 700 million light-years away, which in turn sits at the centre of the Abell 85 galaxy cluster.
它位於一個被稱爲霍姆伯格15A的星系中心，這是一個（距地球）約7億光年遠的超大橢圓星系，它位於阿貝爾85星系羣中心。
The object is one of the biggest black holes ever found, and the biggest found by tracking the movement of the stars around it.
該目標是迄今爲止發現的最大的黑洞之一，也是通過追蹤它周圍的恆星運動所發現的最大的黑洞。
Previous calculations based on the dynamics of the galaxy and the cluster had resulted in Holm 15A* mass estimates of up to 310 billion times the mass of the Sun.
先前根據星系和星團動態得出的計算結果顯示，霍姆15A*星系可能是太陽的3100億倍大。
However, these were all indirect measurements of the black hole. This new research marks the first direct measurement; the paper has been submitted to The Astrophysical Journal, and awaits peer review.
然而，這都是對黑洞的非直接測量。這項新研究標誌着第一次直接測量的實現；而且這篇論文已提交給《天體物理期刊》，目前在等待同行的評審。
"We use orbit-based, axisymmetric Schwarzschild models to analyse the stellar kinematics of Holm 15A from new high-resolution, wide-field spectral observations obtained with MUSE at the VLT. We find a supermassive black hole (SMBH) with a mass of (4.0 ± 0.80) × 1010 solar masses at the center of Holm 15A," the researchers wrote in their paper.
“根據用超大望遠鏡通過MUSE軟件獲取的新的高分辨率廣角光譜觀測結果，我們用基於軌道的軸對稱施瓦西模型來分析霍姆15A星系的恆星運動學特性。我們發現了一個超級大的黑洞（SMBH），它位於霍姆15A星系的中心，是太陽的 (4.0 ± 0.80) × 1010倍大，”研究人員在論文中寫道。
"This is the most massive black hole with a direct dynamical detection in the local Universe."
“這是在局部宇宙中通過直接動力檢測發現的最大的黑洞。”