Pages

The first extragalactic black hole

In the world of black hole researchers, there is a group led by Tomer Shenar that, so far, has mostly demonstrated the non-existence of black holes previously announced by other teams.
As Shenar himself recalled, however,
For the first time, our group has come together to discuss the discovery of a black hole, instead of eliminating one.
We are talking about a black hole found inside the Tarantula Nebula, which is part of the Large Magellanic Cloud, one of the satellite galaxies of the Milky Way.
In particular, this black hole, of stellar mass, is of the "dormant" type, that is, it emits very low levels of X radiation, which are the radiations with which black holes are generally discovered.
This happens because the black hole interacts very little with its surroundings.
Another interesting aspect of the discovery is the absence of any trace of the star that generated the black hole.
[It] appears to have completely collapsed, with no sign of a previous explosion.
This black hole, the first extragalactic, was discovered orbiting a massive star thanks to six years of observations at ESO's Very Large Telescope.

Fields Medals 2022

I hope to write something about the Ising model in the next weeks, but in the meanwhile you can read something about E8 group. Below you can find the mathematicians that awarded the Field Medals 2022:
Hugo Duminil-Copin
For solving longstanding problems in the probabilistic theory of phase transitions in statistical physics, especially in dimensions three and four.
June Huh
For bringing the ideas of Hodge theory to combinatorics, the proof of the Dowling–Wilson conjecture for geometric lattices, the proof of the Heron–Rota–Welsh conjecture for matroids, the development of the theory of Lorentzian polynomials, and the proof of the strong Mason conjecture.
James Maynard
For contributions to analytic number theory, which have led to major advances in the understanding of the structure of prime numbers and in Diophantine approximation.
Maryna Viazovska
For the proof that the E8 lattice provides the densest packing of identical spheres in 8 dimensions, and further contributions to related extremal problems and interpolation problems in Fourier analysis.