Unraveling the Universe's Secrets: Exploring the Evolution of Dark Energy with Dr. Kate Storey-Fisher
Are you ready to embark on a cosmic journey? Join Dr. Ethan Siegel as he takes you through the fascinating world of modern astrophysics in the Starts With A Bang podcast. In episode #125, we dive into the intriguing concept of large-scale structure and the mysteries it holds. But here's where it gets controversial...
For years, we've been told that our Universe is 13.8 billion years old, primarily composed of dark energy, dark matter, and just 5% of normal matter. However, recent discoveries have challenged this long-held belief. We're not just talking about the Hubble tension or differing expansion rate estimates; we're exploring a deeper question: Is dark energy truly constant, or is it evolving over cosmic time?
The puzzle intensifies as we examine two conflicting methods. 'Early relic' techniques, utilizing CMB and baryon acoustic oscillation data, suggest a lower value of around 67 km/s/Mpc for dark energy. On the other hand, 'distance ladder' methods, which are more recent, indicate a higher, incompatible value of approximately 73 km/s/Mpc. Now, here's where it gets even more intriguing. New large-scale structure data supports the idea of evolving dark energy, specifically one that weakens over time.
To navigate this complex topic, we turn to Dr. Kate Storey-Fisher, a renowned cosmologist with expertise in this very field. Dr. Storey-Fisher is a member of the DESI collaboration, which has provided the strongest evidence to date for evolving dark energy. As we look ahead, current and future observatories will collect even more data, offering a glimpse into the future of our understanding of the Universe and our ongoing quest to decipher its mysteries. So, stay tuned, and get ready to explore the cosmos with Dr. Ethan Siegel and his guests!
