6 citations · 8 across the 7 of their papers we have counts for
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TDCOSMO 2026: new insights on the Hubble tension from strong lensing time delays
TDCOSMO Collaboration, Simon Birrer, Michele Cappellari +26
We discuss the measurement of the Hubble constant () in flat cold dark matter cosmology based on the blind hierarchical analysis of 11 multiply-imaged quasars (hereafter t…
TDCOSMO 2026: A 3% measurement of the Hubble constant from strong lensing and stellar kinematics
TDCOSMO Collaboration, Simon Birrer, Michele Cappellari +26
We present cosmological constraints from 11 strongly lensed quasars with measured time delays (hereafter, the TDCOSMO-2026 sample). In addition to expanding the sample, we improve…
TDCOSMO XXXI: New techniques in line-of-sight studies of time delay lenses
Daniel Johnson, Devon Williams, Chris Fassnacht +5
The distribution of matter along the same line of sight but external to the main lens, quantified by , is a key source of uncertainty in time delay cosmography and…
Cosmology with the line-of-sight shear of strong gravitational lenses
Pierre Fleury, Daniel Johnson, Théo Duboscq +2
Stage-IV photometric galaxy surveys are designed to measure the position and shapes of billions of galaxies. Their aim is to characterise the large-scale distribution of matter in…
Degeneracies and modelling choices in double-plane time-delay cosmography
Daniel Johnson, Pierre Fleury, Martin Millon
Double-plane gravitational lensing is a rare but increasingly observed phenomenon in which the light from a distant source is lensed by two foreground objects at different redshift…
Line-of-sight shear in SLACS strong lenses II: validation tests with an extended sample
Natalie B. Hogg, Daniel P. Johnson, Anowar J. Shajib +1
Strong gravitational lensing images are subject to shape distortions due to inhomogeneities along the line of sight. The leading order shape distortion is shear, which, if measurab…
Line-of-sight effects on double source plane lenses
Daniel Johnson, Thomas Collett, Tian Li +1
Weak gravitational lensing perturbations have a non-negligible impact on strong lensing observables, and several degeneracies exist between the properties of the main lens, line of…
Line-of-sight shear in SLACS strong lenses I: shear and mass model parametrisations
Natalie B. Hogg, Daniel P. Johnson, Anowar J. Shajib +1
Inhomogeneities along the line of sight in strong gravitational lensing distort the images produced, in an effect called shear. If measurable, this shear may provide independent co…
Foreground biases in strong gravitational lensing
Daniel Johnson, Pierre Fleury, Julien Larena +1
Strong gravitational lensing is a competitive tool to probe the dark matter and energy content of the Universe. However, significant uncertainties can arise from the choice of lens…