Though I'm not sure what the definition is.Not to critique this great answer (really, I do like it), but I think by "new quasars" the OP didn't mean that they look young when we see them but ones that appear to have formed within, say, the last billion years.

Discuss the workings and policies of this site This helps us in understanding the mysteries of the early universe.According to scientists our galaxy Milky Way once hosted a quasar but now it's not alive. But nearly after 5 billion years from now, the milky way galaxy will collide with its neighbouring Andromeda Galaxy, at that time the Milky way may have a Quasar.Researchers have found that quasars are drifting away from us at an unbelievably high speed of 150 thousand kilometers per sec. The nomenclature “active galactic nuclei” is useful in understanding why.

Naturally, active galactic nuclei can turn inactive: Over tens of thousands of years black holes run out of gas and dust to eat, so quasars dim and grow quiescent.There is nothing controversial about the idea that active galactic nuclei can become inactive. Detailed answers to any questions you might have As we know that quasars are billions of light years away from earth so they are surely the most ancient objects known to us. The amplitude modulation systems that we are going to discuss here are... Pulse Modulation Techniques  In this post, I will discuss different kinds of pulse modulation techniques.

What LaMassa and her colleagues doubted was that a quasar could go from active to inactive in just 10 years. are that the quasar - meaning a luminous phase of an accreting supermassive Three teams—one But even with the examples it remains unclear if these objects are shutting down temporarily or for good. Could it be that after a billion years after the Big Bang, heavier elements transformed quasars into Black Holes?Where do you get the idea that there are no quasars younger than 13 billion years old and what do you mean by the "age" of a quasar? The peak in quasar numbers at redshifts of 2 to 3 suggests that this represents a time in the universe when the rate of collisions between galaxies was at its Maximum. There appears to be a peak in the co-moving population density of quasars at redshifts of between 2 to 2.5. The black holes may provide quasars with their energy. The brightness of most powerful Quasars may be upto thousands of times Greater than a Galaxy containing hundreds of billions of stars such as the Milky Way.

Wiki User. And let's take as a blessing the fact that the ones we do see are so far away. Anybody can answer So when LaMassa presented her In March Andrea Merloni at the Max Planck Institute for Extraterrestrial Physics in Germany studied LaMassa’s mystery object and suggested that it was not a typical quasar at all.

Such a dramatic change should occur on a timescale that dwarfs human lifetimes. This giant disk feeds the  hungry supermassive black hole.As matter starts falling into the black hole from the accretion disk, the friction between the fast spinning matter slowly heats up that causes tremendous amount of energy emission from it.As the accretion disc rotates, the charged particles are shot upward. However, since light travels with finite speed, we observe these objects when there were about 1/2 as old as we are now.

Krolik thinks that this lonely quasar blazed back into existence for the same reason that it flickered out: a variation in the gas and dust flowing onto the black hole.The next step will be to see if any of the newly discovered dozen brighten over the upcoming years.