5 papers
Is Dynamical Dark Energy Necessary? DESI BAO and Modified Recombination
Seyed Hamidreza Mirpoorian, Karsten Jedamzik, Levon Pogosian
Recent measurements of baryon acoustic oscillations (BAO) by the Dark Energy Spectroscopic Instrument (DESI) exhibit a mild-to-moderate tension with cosmic microwave background (CM…
Hints of Primordial Magnetic Fields at Recombination and Implications for the Hubble Tension
Karsten Jedamzik, Levon Pogosian, Tom Abel
Primordial Magnetic Fields (PMFs), long studied as relics of the early Universe, accelerate recombination and have been proposed as a way to relieve the Hubble tension. However, pr…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Modified recombination and the Hubble tension
Seyed Hamidreza Mirpoorian, Karsten Jedamzik, Levon Pogosian
We investigate the extent to which modifying the ionization history at cosmological recombination can relieve the Hubble tension, taking into account all relevant datasets and cons…
Cosmic Recombination in the Presence of Primordial Magnetic Fields
Karsten Jedamzik, Tom Abel, Yacine Ali-Haimoud
Primordial magnetic fields (PMFs) may explain observations of magnetic fields on extragalactic scales. They are most cleanly constrained by measurements of cosmic microwave backgro…