Some photos

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Black holes simulations

Kerr-Newman-de Sitter with and without an accretion disk (and parameters \(\Lambda=5\cdot 10^{-4},~a=0.99,~Q=0.14\)) :

Several light wave frequency shifts (gravitational, Doppler, mixed and mixed with rotation of the camera) :

Cosmological effects on the shadow (\(a=0.95,~Q=0.3\)); observe the absence of horizon when \(\Lambda\ll 0\):

Cosmological effects on the accretion disk (no rotation: \(a=0\)) :

Simulations of M87* (with enlarged inner radius, from EHT's data, with added picture alteration, original photograph by the EHT) :

Some GIFs to observe the light distorsion, in Lorentzian signature (and same parameters as above), then Euclidean (with maximal charge and no rotation) :

Oberwolfach (April 03-08, 2022)

Meeting photo

Mathematisches Forschungsinstitut

Walke

Pines and rock in the Black Forest

Urlaubsparadies Landeckhof (pendant la randonnée traditionnelle)

Wallfahrtskirche St. Romanus

In a chalk shell

Defense (12/10/2021)