The finding, from the Laser Interferometer Gravitational-Wave Observatory, or LIGO, showed that extreme gravity can cause ripples in spacetime.
“The situation is similar to a pregnant woman that has twin babies in her belly.”
Avi Loeb of the Harvard-Smithsonian Center for Astrophysics.
Loeb became suspicious because just 0.4 seconds after LIGO spotted the gravitational waves, a space telescope called Fermi glimpsed a bright flash of gamma-ray light in the same area of the sky.
a bright flash of 一道明亮的闪光的
Colliding black holes should not produce such light—but the death of a very massive star could.
“My idea was that if the star is spinning very rapidly to start with, then as its core collapses it produces a bar that breaks into two clumps of matter, sort of like a dumbbell configuration.And these two clumps of matter orbit a common center, and they eventually collapse independently into two black holes.”
So we'll see if future gravitational wave detections are also accompanied by flashes of light—supporting the idea that twin black holes collided upon the collapse of a massive star.
massive sta r大质量恒星