LIGO Does It Again: A Second Robust Binary Black Hole Coalescence Observed
The twin LIGO detectors caught a 2nd robust signal from a binary black hole (BBH) coalescence. The signal came from two black holes orbiting each other and coalescing into a single black hole. The event was seen during LIGO's 1st Observing run, on December 26th at 03:38:53 UTC/GMT. The two black holes have masses of 14 and 8 the mass of the sun. Read more about the 2nd detection on the LIGO website.
Image: This artist's illustration depicts the merging black hole binary systems for GW150914 (left image) and GW151226 (right image). The black hole pairs are shown together in this illustration, but were actually detected at different times, and on different parts of the sky. The images have been scaled to show the difference in black hole masses. In the GW150914 event, the black holes were 29 and 36 times that of our Sun, while in GW151226, the two black holes weighed in at 14 and 8 solar masses. Image credit: LIGO/A. Simonnet