175 citations · 2.7k across the 72 of their papers we have counts for
6 papers · 1 filter
Cosmic dissonance: new physics or systematics behind a short sound horizon?
Nikki Arendse, Radosław J. Wojtak, Adriano Agnello +12
Persistent tension between low-redshift observations and the Cosmic Microwave Background radiation (CMB), in terms of two fundamental distance scales set by the sound horizon …
The Hubble-Lemaître constant and sound horizon from low-redshift probes
Radosław Wojtak, Adriano Agnello
We revisit the claimed tension, or lack thereof, of measured values of the Hubble-Lemaître parameter from Cosmic Microwave Background (CMB) data and low-redshift indicators.…
Einstein-Vlasov Calculations of Structure Formation
William E. East, Radosław Wojtak, Frans Pretorius
We study the dynamics of small inhomogeneities in an expanding universe collapsing to form bound structures using full solutions of the Einstein-Vlasov (N-body) equations. We compa…
Low-redshift measurement of the sound horizon through gravitational time-delays
Nikki Arendse, Adriano Agnello, Radosław Wojtak
The matter sound horizon can be inferred from the cosmic microwave background within the Standard Model. Independent direct measurements of the sound horizon are then a probe of po…
A new measurement of the Hubble constant and matter content of the Universe using extragalactic background light -ray attenuation
Alberto Domínguez, Radoslaw Wojtak, Justin Finke +7
The Hubble constant and matter density of the Universe are measured using the latest -ray attenuation results from Fermi-LAT and Cherenkov telescopes. This metho…
Magnified or multiply imaged? - Search strategies for gravitationally lensed supernovae in wide-field surveys
Radosław Wojtak, Jens Hjorth, Christa Gall
Strongly lensed supernovae can be detected as multiply imaged or highly magnified transients. In order to compare the performances of these two observational strategies, we calcula…