As I promised, today I want to talk about cuasars (yesterday wrote quasar… but anyway it’s the same, in spanish).
Many people think that a quasar is a star, some kind of star with eccentric properties, but deep down, a star. Others, some of the above, confuse quasars with neutron stars because, it sounds them drawings and some have heard in the channel history that are “beacons Radio” or similar things, becoming the cock a mess about it.
Actually a quasar is nothing more than an object (anything can be a star… or not) that emits a very strong radiation. But any radiation, ie wave ?, no, a very particular radio waves.
As radio waves it emits, is nothing more than electromagnetic radiation (like everything) at a frequency (good range) determined between 1 kHz and 300 GHz (remember that everyone puts the limit where they want).
If we observe how electromagnetic waves are emitted we can “know” what kind of stellar objects are more prone to it. An electromagnetic quickly wave can be created with a dipole polarity change quickly, this magnetize form “what is around” and radiate these waves. Obviously there are more ways, but this is what we are particularly interested.
If we think about what we have said, which rotates rapidly (ranging, go) with different signs and therefore the friend Maxwell, creates a field and issues, and observe the universe around us, we need “something” quickly turn around another and which together have opposite charges.
An example of this is the gas that is around a black hole. Let’s see: the gas, rotates around the black hole (check!), the rotation speed is faster the more it approaches the event horizon which is a place in time (check!), the gas, by friction with the rest of the gas is electrically charged, this hot and emits light (electromagnetic radiation) (check!)… for longer.
A typical quasar or quasar and standard superheated gas is orbiting a black hole. It is not the black hole itself, it is the gas that surrounds it. So always, in all the documentaries, when images of a black hole at the center of the it gets emanate rays that, frankly, few are clarified. They are electromagnetic emissions quasar, gas and are one of the ways to detect a black hole.
But only the gas of black holes creates quasars ?. Well, no. Two stars rotating very close, rotating black holes very close, also created quasars. In both cases it is the same, gas, heat, dipoles is equal to the emission of electromagnetic radiation. Perhaps not as strong as with a good sized black hole, perhaps at lower frequencies, maybe not this very light “in the red” (which it means that the emission spectrum is long), but it works the same. They are also quasars.
So, remember, a quasar is not a star, but can be anything, anything, now I hope you understand a bit more how it works.