Burping in black hole occurs when some high energy particles are released after black hole consumes hot cosmic gas.
The team used observations from two space telescopes-the Hubble Space Telescope and the Chandra X-ray Observatory-as well as the W.M. Keck Observatory in Mauna Kea, Hawaii, and the Apache Point Observatory near Sunspot, New Mexico.
Scientists have already spotted black holes burping before, although this time they observed one black hole do it multiple times.
Black holes are the darlings of astrophysicists all over the world. There is no escape from the crushing embrace of one of these dark monsters, and nothing that enters a black hole's orbit will ever be free again.
A super-massive black hole 800 million light-years away just gave evidence of a cyclical feeding cycle, possibly confirming theories about the life cycles of these mysterious celestial objects.
The gas they pick up produced electromagnetic radiation as it becomes increasingly dense and is pulled towards the event horizon. The Chandra's X-ray observatory's website stated that the latest discovery is a strong evidence that the combining and growing black holes can switch their power off and on again over timescales that are short when compared to the 13.8 billion-year-old Universe. "Fortunately, we happened to observe this galaxy in a moment where we could clearly see both events".
The scientists believe there were two burps in quick succession as the black hole consumed two separate "meals" of matter. The answer lies in a companion galaxy that is linked to J1354 by streams of stars and gas produced by a collision between the two galaxies. The Milky Way's very own supermassive black hole is known to have feasted before. To the north they found evidence for a shock wave, similar to a sonic boom, located about 3,000 light-years from the black hole. But when they were analyzing at a black hole burp that occurred nearly 100,000 years ago, they found out another new belch coming out from the same cosmic sinkhole.
"This galaxy really caught us off guard", said CU Boulder doctoral student Rebecca Nevin, a study co-author who used data from APO to look at the velocities and intensities of light from the gas and stars in J1354. We know a lot of examples of black holes with single burps emanating out, but we discovered a galaxy with a supermassive black hole that has not one but two burps. Now that researchers have discovered those belches, it helps them determine the pace of those processes.
"These are the kinds of bubbles we see after a black hole feeding event", said CU postdoctoral fellow Scott Barrows.
Just like normal black holes, they are regions of space-time with gravitational effects so strong that even electromagnetic radiation such as light can not escape from inside of them.
Dr Comerford said that the black hole was going through a cycle of feasting, belching and napping, before starting again.