The Dark Sector of the Universe: Dark Matter and Energy (2) - Françoise Combes (2024-2025)
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Teaching 2024-2025: The dark sector of the Universe: dark matter and energy Seminar of November 18, 2024: Inflation and primordial black holes Speaker: Vincent Vennin, ENS-Paris The Big Bang theory describes an expanding Universe, in which large structures are formed by gravitational collapse. These are the galaxies, filaments, walls and cosmic voids that surround us. The embryos of these structures are the quantum fluctuations of the void, modeled during a phase of accelerated expansion called "inflation". This radical hypothesis, which assumes that any structured element (galaxy, star, planet, human being, etc.) comes from quantum fluctuations in the primordial Universe, has been remarkably confirmed by measurements of the cosmic microwave background, fossil light that the Universe released in its very first moments. The possibility that some of these abnormally large fluctuations collapse into "primordial" black holes has recently received increased attention, as these black holes could constitute the dark matter of the Universe. We will return to these key elements of primordial cosmology, and highlight some open questions that constitute as many avenues of research to explore. Find the audio and video recordings of the seminar cycle: https://www.college-de-france.fr/fr/a... Galaxies and Cosmology Chair Professor: Françoise Combes, Collège de France Find all her teachings: https://www.college-de-france.fr/chai... • Galaxies and Cosmology - Françoise Co... The Collège de France is an institution of fundamental research in all fields of knowledge and a place for the dissemination of "knowledge in the making" open to all. The courses, seminars, and colloquiums are recorded and then made available to the public on the Collège de France website. Discover all the resources of the Collège de France: https://www.college-de-france.fr Support the Collège de France: https://www.fondation-cdf.fr/faire-un... Follow us on: Facebook: / college.de.france Instagram: / collegedefrance X (ex-Twitter): https://x.com/cdf1530 LinkedIn: / collègedefrance
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