Concept
Static universe
Related publications (48)
Heuristic Estimation of the Vacuum Energy Density of the Universe: Part II-Analysis Based on Frequency Domain Electromagnetic Radiation
In Part I of this paper, an inequality satisfied by the vacuum energy density of the universe was derived using an indirect and heuristic procedure. The derivation is based on a proposed thought experiment, according to which an electron is accelerated to ...
2024An Atlas of Color-selected Quiescent Galaxies at z > 3 in Public JWST Fields
Michaela Hirschmann, Minju Lee
We present the results of a systematic search for candidate quiescent galaxies in the distant universe in 11 JWST fields with publicly available observations collected during the first 3 months of operations and covering an effective sky area of similar to ...
IOP Publishing Ltd2023Strong gravitational lensing by AGNs as a probe of the quasar-host relations in the distant Universe
Frédéric Courbin, Martin Raoul Robert Millon, Aymeric Alexandre Galan, Malte Tewes
A rare case of a quasar acting as a gravitational lens allows a precise determination of the mass of the quasar's host galaxy and offers a new path to studying the connections between supermassive black holes and their host galaxies. The tight correlations ...
NATURE PORTFOLIO2023CEERS Key Paper. VI. JWST/MIRI Uncovers a Large Population of Obscured AGN at High Redshifts
Mid-infrared (mid-IR) observations are powerful in identifying heavily obscured active galactic nuclei (AGN) that have weak emission in other wavelengths. Data from the Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope provides an exce ...
2023CosmoLattice: A modern code for lattice simulations of scalar and gauge field dynamics in an expanding universe
Daniel Garcia Figueroa, Adrien Florio, Wessel Valkenburg, Francisco Torrenti
This paper describes CosmoGattice, a modern package for lattice simulations of the dynamics of interacting scalar and gauge fields in an expanding universe. CosmoGattice incorporates a series of features that makes it very versatile and powerful: i) it is ...
ELSEVIER2023Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky
Cameron Alexander Campbell Lemon, Rémy Elie Joseph, Johan Richard
Detecting gravitationally lensed supernovae is among the biggest challenges in astronomy. It involves a combination of two very rare phenomena: catching the transient signal of a stellar explosion in a distant galaxy and observing it through a nearly perfe ...
NATURE PORTFOLIO2023The ellipticity parameterization for an NFW profile: An overlooked angular structure in strong lens modeling
Galaxy-scale gravitational lenses are often modeled with two-component mass profiles where one component represents the stellar mass and the second is a Navarro Frenk White (NFW) profile representing the dark matter. Outside of the spherical case, the NFW ...
Les Ulis Cedex A2023LensWatch. I. Resolved HST Observations and Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky")
Frédéric Courbin, Adriano Agnello
Supernovae (SNe) that have been multiply imaged by gravitational lensing are rare and powerful probes for cosmology. Each detection is an opportunity to develop the critical tools and methodologies needed as the sample of lensed SNe increases by orders of ...
IOP Publishing Ltd2023Boundary Stabilization of Focusing NLKG near Unstable Equilibria: Radial Case
Joachim Krieger, Shengquan Xiang
We investigate the stability and stabilization of the cubic focusing Klein-Gordon equation around static solutions on the closed ball in . First we show that the system is linearly unstable near the static solution for any dissipat ...
2020