Dr. Sveva Castello, Postdoctoral Fellow at the Max Planck Institute for Astrophysics (Garching, Germany)
Our understanding of the Universe relies on two pillars, gravity and dark matter. These are involved in compelling open questions: is the accelerated cosmic expansion due to gravity modifications? And does dark matter experience gravity in the same way as normal matter? I will discuss some insights about these issues that can be drawn from the observed distribution of galaxies. In particular, I will introduce you to the protagonist of my recent work: the distortion of time, a novel observable that provides key information to disentangle modified gravity theories from extended dark matter scenarios.
Article
https://arxiv.org/abs/2404.09379
https://arxiv.org/abs/2412.08627
https://arxiv.org/abs/2503.11585
Recording
The talk will be streamed and there will be a recording.