We divide stars into populations based on how much metal they have in them.
Population I stars like the Sun have higher amounts of metal than older Population II stars.
There are hypothetical Population III stars which have no metal in them. These would be the very first stars.

The Genesis of Kerr Solution:
A Complete Description of Spinning Black Holes — The Most Formidable Objects in the Universe


"The mathematical theory of black holes is a subject of immense complexity; but its study has convinced me of the basic truth of the ancient mottoes,
The simple is the seal of the true
Beauty is the splendour of truth."

"Black holes are macroscopic objects with masses varying from a few solar masses to millions of solar masses. To the extent they may be considered as stationary and isolated, to that extent, they are all, every single one of them, described exactly by the Kerr solution. This is the only instance we have of an exact description of a macroscopic object."

@ferrous basically the mechanisms of electromagnetic radiation in pulsars, magnetars and FRBs, photons in a broad range :)

BTW, I'm Brazilian, so sometimes I put some Portuguese among my science stuff here, and at other times, Italian :p

Re- (I am here since 14 Fev. 2019). I have PhD in Nuclear Physics and in Relativistic Astrophysics. My research focuses on: strongly interacting matter at ultra-high densities; structure/evolution of compact stars, supernovae, wormholes; emission mechanisms (electromagnetic/gravitational), supercritical electromagnetic fields (GRBs, SGRs/AXPs, FRBs), cosmic rays, d-dimensional/alternatives theories of gravity. Also have interest in noncommutative quantum theories and data science.

Hi, I'm Tom. I'm a professor at the TU , Centre for Cognitive Science, studying visual perception using behavioural experiments, eye tracking, and computational models.

I'm here for science-related things.

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