The Hubble Space Telescope Captures Mysterious ‘Ghosts’ Of Quasars
NASA has shared some images of the long-gone mysterious “ghosts” of quasars. These goblin-green striking snaps of possibly the last fragments of ghosts are captured by the Hubble Space Telescope.
The Hubble captured these enigmatic objects in eight different galaxies. This was probably made possible by a certain explosion of ultraviolet radiations from quasars. Quasars, which are massive celestial objects with black holes, are capable of consuming gas from surroundings and emit huge quantities of energy. This emission of energy generates beams of light.
Bill Keel of the University of Alabama at Tuscaloosa, who initiated the Hubble investigation of the distant objects, thinks that the recent observation was made possible by some incident happened in the remote past as galaxies can’t glow much now.
“…the quasars are not bright enough now to account for what we’re seeing; this is a record of something that happened in the past, the glowing filaments are telling us that the quasars were once emitting more energy, or they are changing very rapidly, which they were not supposed to do,” Keel said.
Opining on the possible cause of the emission of light, Keel said that pair of black holes are possibly charging up the quasars, mutual orbiting can thus cause variance in the brightness of quasars. Researchers exemplify the process with dimmer switch on a chandelier.
The images of the quasars are greenish because of the once-invisible filaments in deep space. There are various atoms found in these filaments including Oxygen, Hydrogen, Helium, Nitrogen, Sulfur, and Neon.
According to the researchers, Oxygen atoms absorb light from the surrounding quasars before re-emitting this energy in the form of light for many thousand years. “The heavy elements occur in modest amounts, adding to the case that the gas originated in the outskirts of the galaxies rather than being blasted out from the nucleus,” Keel said.
The above discussed green filament are considered to be the gases separated apart as a result of merger of two galaxies. Now these massive tails of gases are orbiting their galaxy at a very slow speed.
“We see these twisting dust lanes connecting to the gas, and there’s a mathematical model for how that material wraps around in the galaxy,” Keel noted. “Potentially, you can say we’re seeing it 1.5 billion years after a smaller gas-rich galaxy fell into a bigger galaxy.”