Ive looked on a good number of websites, including the pedia, and i still feel like i didnt get a straight answer. What exactly is a quasar. Is it a black hole in the center of a galaxy? What is the physical makeup of a quasar?
Radiation emission is triggered by compression of the materials falling into the center by gravity. The properties of the central object dictate the frequency range of this radiation.perhaps you could elucidate how an accretion disc could be responsible for such enormous output of EM radiation?
the accretion process is one of the most efficient ways of converting mass into energy (that we know of anyways). suppose a very small amount of matter undergoes a chemical reaction of some sort (combustion, synthesis, acid-base, etc.), and releases several hundred eV (electron volts) of energy. if an identical amount of that same matter were split apart at the atomic level (nuclear fission), it would produce several hundred MeV (several hundred million electron volts). the rate at which nuclear reactions convert mass into energy is several orders of magnitude greater than any chemical reaction. in nuclear fission, approx. 0.04% of the mass involved in the reaction will be converted to energy. nuclear fusion is approx. 8 times as efficient as fission, converting approx. 0.3% of the mass involved in the reaction into energy. but when it comes to converting mass directly into energy, hardly any other method appears to be more efficient than accretion around a highly compact massive object (the only other method i can think of that is theoretically more efficient is matter-antimatter annihilation). while i don't have a source in front of me, i seem to recall reading that an accretion disk can convert up to a whopping ~10% of its mass into energy.perhaps you could elucidate how an accretion disc could be responsible for such enormous output of EM radiation?
It's possible.More mature galaxies, including The Milky Way, have supermassive BHs but not such a big accretion disc. It is thought that those galaxies where themselves quasars when they were younger?
Yep.So If allowed enough time would a black hole eventually evaporate?
Would it eventually transform all its mass to energy?
There is no minimum mass for a black hole. What is requires is density. Your own body could become a black hole if compressed enough.Or would it eventually stop once its own mass dropped below the minimum mass for a black hole?