Kavli Affiliate: E. P. S. Shellard| First 5 Authors: Yoann L. Launay, Yoann L. Launay, , , | Summary:We show that it is possible to simulate realistic inhomogeneities during cosmological inflation with high precision using Numerical Relativity. Stochastic initial conditions are set in line with the Bunch-Davies vacuum and satisfy the Hamiltonian and Momentum constraints […]
Kavli Affiliate: Roberto Maiolino | First 5 Authors: Dávid Puskás, Sandro Tacchella, Charlotte Simmonds, Kevin Hainline, Francesco D’Eugenio | Summary: We present a comprehensive analysis of galaxy close-pair fractions and major merger rates to evaluate the importance of mergers in the hierarchical growth of galaxies over cosmic time. This study focuses on the previously poorly […]
Kavli Affiliate: Martin Haehnelt | First 5 Authors: Marion Farcy, Joakim Rosdahl, Yohan Dubois, Jérémy Blaizot, Sergio Martin-Alvarez | Summary: Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role of cosmic ray (CR) feedback in galaxy evolution and reionisation, by examining its impact on the escape of […]
Kavli Affiliate: Martin Haehnelt | Summary:Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role of cosmic ray (CR) feedback in galaxy evolution and reionisation, by examining its impact on the escape of ionising radiation from galaxies. For this purpose, we present two Sphinx cosmological radiation-magneto-hydrodynamics simulations, allowing […]
Kavli Affiliate: Debora Sijacki | First 5 Authors: Xihan Ji, Roberto Maiolino, Hannah Übler, Jan Scholtz, Francesco D’Eugenio | Summary: Recent observations from JWST have revealed an abundant population of active galactic nuclei (AGN) and so-called “Little Red Dots” (LRDs) at $2lesssim z lesssim 11$, many of which are characterized by V-shaped UV-to-optical continua with […]
Kavli Affiliate: Debora Sijacki | Summary:Recent observations from JWST have revealed an abundant population of active galactic nuclei (AGN) and so-called “Little Red Dots” (LRDs) at $2lesssim z lesssim 11$, many of which are characterized by V-shaped UV-to-optical continua with turnovers around the Balmer limit. The physical nature of these LRDs is unclear, and it […]
Kavli Affiliate: Blake Sherwin | Summary:The kinetic Sunyaev-Zel’dovich effect (kSZ) and patchy screening effect are two complementary cosmic microwave background (CMB) probes of the reionization era. The kSZ effect is a relatively strong signal, but is difficult to disentangle from other sources of temperature anisotropy, whereas patchy screening is weaker but can be reconstructed using […]
Kavli Affiliate: Martin Haehnelt | Summary:We present the first constraints on primordial magnetic fields from the Lyman-$α$ forest using full cosmological hydrodynamic simulations. At the scales and redshifts probed by the data, the flux power spectrum is extremely sensitive to the extra power induced by primordial magnetic fields in the linear matter power spectrum, at […]
Kavli Affiliate: E. P. S. Shellard| First 5 Authors: Yoann L. Launay, Yoann L. Launay, , , | Summary:We examine the classical and quantum evolution of inflationary cosmological perturbations from quantum initial conditions, using the on-shell and off-shell contributions to correlators to investigate the signatures of interactions. In particular, we calculate the Keldysh contributions to […]
Kavli Affiliate: Roberto Maiolino | Summary:Early JWST observations are providing growing evidence for a ubiquitous population of accreting supermassive black holes (BHs) at high redshift, many of which appear overmassive compared to the empirically-derived local scaling relation between black hole mass and host galaxy stellar mass. In this study, we leverage predictions from the semi-analytical […]