14 papers
Evidence for renormalized instantons in real-time simulations of vacuum decay
Emilie Hertig, Alexander C. Jenkins, Hiranya V. Peiris +2
While vacuum decay is traditionally described by Euclidean instanton methods, lattice simulations enable real-time modeling of dynamical observables relevant to cosmology and upcom…
Emergence of phantom cold dark matter from spacetime diffusion
Jonathan Oppenheim, Emanuele Panella, Andrew Pontzen
General relativity can be reconciled with quantum field theory without quantising the geometry only if the metric evolves stochastically. In this article, we explore the consequenc…
Thermostats, Not Engines: A New Picture of Halo Gas Regulation
Hiranya V. Peiris, Andrew Pontzen, Madalina N. Tudorache +5
We propose that black hole feedback regulates gas in massive halos by establishing an entropy ceiling; the resulting buoyant gas migrates to the virial radius with no additional en…
The limits of feedback from active galactic nuclei
Andrew Pontzen, Hiranya V. Peiris, Joop Schaye +1
We use FLAMINGO to investigate why feedback from active galactic nuclei (AGN) significantly depletes gas in galaxy groups but is ineffective in clusters. We delineate three radial…
Ripples in the baryon to dark matter ratio in CDM: implications for galaxy formation
Owen Jessop, Adrian Jenkins, Andrew Pontzen +3
We use the FLAMINGO galaxy formation model to quantify the impact of baryon-CDM isocurvature perturbations on galaxy formation in CDM. In linear theory, these perturbations rep…
VINTERGATAN-GM: long-lived satellite planes induced by a massive GSE-like merger
R. RodrÃguez-Cardoso, S. Roca-FÃ brega, Oscar Agertz +7
Satellite galaxies in the Local Group tend to be distributed in thin, planar configurations, with many sharing coherent orbital motion. Galaxy formation simulations in CDM have…