57 min
Does the quasar dipole break LambdaCDM?
Cosmology, Astrophysics and seminar by Arefe Abghari, UBC
Tuesday 11:00 UTC
Recording available
Waterloo, Canada
Recording
Abstract
Claims of an unexpectedly large quasar dipole have raised questions about large-scale cosmic isotropy. This talk tests whether survey selection and estimation effects can explain the discrepancy with the motion inferred from the microwave background. Higher angular multipoles in the quasar map can account for the difference, emphasizing the need to control systematic effects before interpreting the signal as a failure of standard cosmology.
Topics
quasar dipolelarge-scale cosmic isotropysurvey selectionestimation effectsmicrowave backgroundangular multipolesquasar mapsystematic effectsstandard cosmology