• Warps and twists around black holes

    Twisted jets? Warped disks? It’s all possible in black holes! Hi all! Today I will talk a bit about our recent paper on the different types of disks you can have around black holes. As perhaps you would know, in 2019, the Event Horizon Telescope collaboration (EHTC) released the first-ever photos of the inner regions of the galaxy M87 (see link here). The EHTC studied an extensive suite of theoretical models of accreting black holes and tried to see which models looked similar to the observed images. These models simulate how the gas accretes onto a spinning or non-spinning black hole and then calculates how photons of light produced by…

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  • The microphysics of astrophysics: protons and electrons reveal the existence of black holes

    My name is Dimitris Kantzas and I am a PhD student in Sera’s group. My research is focused on studying the multiwavelength radiation emitted in the vicinity of accreting black holes in order to better understand how these sources radiate, where exactly this radiation originates and if this radiation affects the physics and the morphology of these accreting black holes and their local environments. But what are black holes? Where are they located, and how can we detect them? Black holes are regions of the spacetime with a very strong gravitational potential that doesn’t allow anything to escape, not even light. Black holes are everywhere in the Universe and we…

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