Quasars are the farthest space objects from a galaxy. They emit powerful radio signals and appears like a star. They are formed when massive black hole start sucking a fairly large amount of matter in its acceleration disk. The matter will spin around the acceleration disk.
The matter will continue spinning as well as gaining momentum and as it accelerates in an extremely past speed, it creates friction. The friction will create a light. It is the light that we can see.
In this connection, Yale University research team have come across an evolving quasar which according to them may have some sort of a dimming device.
Moreover, they are convinced that their new discovery may help contribute additional understanding into the existence of quasars and their development. Quasars share the same energy source with black holes.
While previous researches were able to observe both bright and dark phases of a quasar’s life time from different sources, this is the first time that it was discovered to happen in one and the same quasar.
“We’ve looked at hundreds of thousands of quasars at this point, and now we’ve found a signal that has switched off. This could inform us anything about their lifetimes,” explains C. Megan Urry.
The Yale University professor of astronomy and astrophysics observed that the quantity of gasses surrounding the black hole has been extremely reduced. This is like sending some sort of an alert to the astronomers that the black hole may have gobbled up a small amount of matter, similar to the size of a galaxy.
“This is like a dimmer switch,” comments Yale associate research scientist Stephanie LaMassa. “The power supply just went dim. Simply because the life cycle of a quasar is one of the biggest unknowns, catching one as it changes, within a human lifetime, is amazing.”
This exciting discovery may shed more light about our understanding of black holes in relation to the formation of galaxies like the one we have.
“It makes a difference to know how black holes grow,” Urry notes, detailing that every galaxy has a black hole and that quasars are defined as a phase a black holes go through before they go dormant. “This perhaps has implications for how the Milky Way looks today.”
LaMassa continues, “Even though astronomers have been studying quasars for more than 50 years, it’s exciting that someone like me, who has studied black holes for almost a decade, can find something completely new.”