179 citations · 2.2k across the 65 of their papers we have counts for
37 papers · 1 filter
A hybrid method for reconstruction of the equation of state of dark energy and its application to Pantheon+SH0ES data
Gawain Simpson, Krzysztof Bolejko, Stephen Walters
Cosmology aims to understand the physical properties of our Universe on its largest scales. One such feature is the expansion of the Universe, which currently seems to be dominated…
Local environmental dependence on weak-lensing shear statistics
Sonia Akter Ema, Md Rasel Hossen, Krzysztof Bolejko +1
Despite the assumption that an ideal FLRW observer is not dependent on the local environment, observations are biased by the positions of the observers due to the matter correlatio…
Constraining decaying dark matter models with gravitational lensing and cosmic voids
Earl Lester, Krzysztof Bolejko
Despite overwhelming observational evidence for dark matter, we still have no evidence of direct detection. Consequently, our knowledge about dark matter is limited, for example, w…
The Redshift Difference in Gravitational Lensed Systems: A Novel Probe of Cosmology
Chengyi Wang, Krzysztof Bolejko, Geraint F. Lewis
The exploration of the redshift drift, a direct measurement of cosmological expansion, is expected to take several decades of observation with stable, sensitive instruments. We int…
Detecting cosmic voids via maps of geometric-optics parameters
Marius Peper, Boudewijn F. Roukema, Krzysztof Bolejko
Curved-spacetime geometric-optics maps derived from a deep photometric survey should contain information about the three-dimensional matter distribution and thus about cosmic voids…
The Instantaneous Redshift Difference of Gravitationally Lensed Images: Theory and Observational Prospects
Chengyi Wang, Krzysztof Bolejko, Geraint F. Lewis
Due to the expansion of our Universe, the redshift of distant objects changes with time. Although the amplitude of this redshift drift is small, it will be measurable with a decade…