APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Cristian Barrera-Hinojosa (Durham U)
Title: Exploring the vector modes of ΛCDM with general-relativistic simulations
Date (JST): Thu, Dec 03, 2020, 16:00 - 17:00
Place: Zoom
Related File: 2613.pdf
Abstract: In this talk, I will discuss results on the dark matter vorticity field and the gravitomagnetic (frame-dragging) potential in ΛCDM, obtained from a high-resolution, general-relativistic N-body simulation performed with the recently-developed GRAMSES code. In particular, I will discuss how the shape and evolution of the vorticity power spectrum can be parametrised on large sub-horizon scales as well as into the nonlinear regime. I will then focus on exploring the behaviour of the gravitomagnetic potential in dark matter haloes of different masses, as well as the corresponding gravitomagnetic force acting on such structures. A comparison with the scalar (standard) gravitational potential will be discussed to assess the magnitude of the new effects.