ABSTRACT: Wojtak, Hansen and Hjorth and others have measured the long-predicted gravitational redshift of light escaping from galaxy clusters using Sloan Digital Sky Survey data. The effect is very small, corresponding to a velocity shift of only ~10 km/s in …
Nick Kaiser (Hawaii) "The Physics of Gravitational Redshifts in Clusters of Galaxies" Read More »
Abstract: Much of the exploration of the high-redshift Universe has focussed on first finding sites of ongoing star formation. This can then lead to pointed follow-up of how much cold (molecular) gas there is that feeds this star formation. ALMA …
ABSTRACT: Supernovae remain a central part of dark energy science, complementing the programs with BAO and weak lensing. The LBNL group is active with the nearby supernova search with the SN factory, a role in the intermediate-redshift DES supernova program, …
Abstract: The large-scale structure of our universe (the distribution of galaxies on very large-scales for instance) contains a wealth of information about the origin, evolution, and matter content of the universe. Extracting this information relies crucially on understanding how galaxies …
Abstract: I'll remind us all of the motivation for Supersymmetry searches at the LHC, and provide a general overview of the status of the search. Since, even after results making use of in excess of 10 fb-1 of 13 TeV …
Abstract: Measurements of the universe's present-day expansion rate, or the Hubble constant (H0), that use a Cepheid variable star calibration of Type Ia supernovae (SNe Ia) are in >4σ disagreement with values predicted by the standard, Lambda cold dark matter …