File:Cosmology (& astrophysics) with the Lyman alpha forest.webm
Original file (WebM audio/video file, VP9/Opus, length 29 min 5 s, 1,920 × 1,080 pixels, 313 kbps overall, file size: 65.21 MB)
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Summary[edit]
| Description |
English: Ignasi Pérez-Ràfols (Sorbonne Université, Laboratoire de Physique Nucléaire et de Hautes Energies)
The acceleration of the expansion rate of the Universe is yet to be explained. Several models, including LCDM, try to explain this acceleration. LCDM bases its explanation on a mysterious dark energy, adding up to ~75% of the total energy density of the Universe. Other models present modified theories of gravity to explain this effect. But which one is correct? The expansion history of the Universe is a great observable to discriminate between these models. I will talk about measurements of this expansion history at redshift greater than 2 using BAO with the Lyman alpha forest. I will talk about the most recent results from eBOSS, and also from the next generation of surveys that is currently starting: DESI and WEAVE. I will talk about how improving our knowledge of the Lyman alpha forest can help us not only with answering our cosmological questions, but also with our understanding on galaxy evolution. video editing Benjamin Benne |
| Date | |
| Source | YouTube: Cosmology (& astrophysics) with the Lyman alpha forest – View/save archived versions on archive.org and archive.today |
| Author | Laboratoire d'astrophysique de Bordeaux |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:37, 8 June 2022 | 29 min 5 s, 1,920 × 1,080 (65.21 MB) | Yann (talk | contribs) | Imported media from https://www.youtube.com/watch?v=9Vj1D8H0puM |
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