Unveiling the singular dynamics in the cosmic large-scale structure
- Author(s)
- Cornelius Rampf, Uriel Frisch, Oliver Hahn
- Abstract
It is known that the gravitational collapse of cold dark matter leads to infinite-density caustics that seed the primordial dark-matter haloes in the large-scale structure. The development of these caustics begins, generically, as an almost one-dimensional phenomenon with the formation of pancakes. Focusing on the one-dimensional case, we identify a landscape of non-differentiable, and thus, singular features in the particle acceleration that emerge after the first crossing of particle trajectories. We complement our fully analytical studies by high-resolution simulations and find outstanding agreement, particularly shortly after the first crossing. We develop the methods in one space dimension but outline briefly the necessary steps for the 3D case.
- Organisation(s)
- Department of Mathematics, Department of Astrophysics
- External organisation(s)
- Université Côte d'Azur
- Journal
- Monthly Notices of the Royal Astronomical Society: Letters
- Volume
- 505
- Pages
- L90-L94
- No. of pages
- 5
- ISSN
- 1745-3925
- DOI
- https://doi.org/10.1093/mnrasl/slab053
- Publication date
- 07-2021
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics, 103038 Space exploration, 103044 Cosmology
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/b5da70fd-40de-4403-85d5-c525c6df905f