The black hole that defies everything we know about the life of stars: an object discovered in 1964 could give the finishing touch to current models
It is called Cygnus X-1 and, with its 21 solar masses, it is another of those holes that don’t stop coming outand no longer to the Universe that too, yes to our theories about the processes of formation and stellar evolution. For some time now it is difficult for us to look at the stars as we looked at them before.
And it is that, ultimately, the mass of stellar black holes is determined by the parent star. In other words, it is limited by the mass that it is losing throughout its life in what we call stellar winds. Hence, as confirmed by our measurements of binary x-ray known, it was thought that these black holes could not have more than 20 solar masses. In fact, the biggest we had found in binaries was between 15-17.
Holes, stars and vice versa
At the end of 2019, We hit LB-1, a black hole with a mass 70 times that of the Sun, and since then star formation theorists have had nothing but bad news.
Bad news that Cygnus X-1 only exacerbates because it is a very well studied hole found in our galaxy and the Confirmation by the James Miller-Jones team and his team that it has a mass of 21 soles it only confirms that there is something that we are not understanding well. And now we have electromagnetic testing.
That is, it is no longer an isolated event, nor a problem with certain specific instruments: it is a challenge to current models of the life of stars because, according to the authors, for a black hole of this size to exist in the Milky Way , these are failing considerably.