Publications (27)
Cosmology and astrophysics from relaxed galaxy clusters - IV: Robustly calibrating hydrostatic masses with weak lensing
D. E. Applegate, A. Mantz, S. W. Allen +8
This is the fourth in a series of papers studying the astrophysics and cosmology of massive, dynamically relaxed galaxy clusters. Here, we use measurements of weak gravitational le…
H0LiCOW I. Lenses in COSMOGRAIL's Wellspring: Program Overview
S. H. Suyu, V. Bonvin, F. Courbin +21
Strong gravitational lens systems with time delays between the multiple images allow measurements of time-delay distances, which are primarily sensitive to the Hubble constant that…
Dissecting the Gravitational Lens B1608+656. II. Precision Measurements of the Hubble Constant, Spatial Curvature, and the Dark Energy Equation of State
S. H. Suyu, P. J. Marshall, M. W. Auger +5
Strong gravitational lens systems with measured time delays between the multiple images provide a method for measuring the "time-delay distance" to the lens, and thus the Hubble co…
Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS data
D. Gruen, O. Friedrich, E. Krause +93
We derive cosmological constraints from the probability distribution function (PDF) of evolved large-scale matter density fluctuations. We do this by splitting lines of sight by de…
A comparison of the excess mass around CFHTLenS galaxy-pairs to predictions from a semi-analytic model using galaxy-galaxy-galaxy lensing
P. Simon, H. Saghiha, S. Hilbert +3
The matter environment of galaxies is connected to the physics of galaxy formation and evolution. Utilising galaxy-galaxy-galaxy lensing as a direct probe, we map out the distribut…
TDCOSMO. I. An exploration of systematic uncertainties in the inference of from time-delay cosmography
M. Millon, A. Galan, F. Courbin +22
Time-delay cosmography of lensed quasars has achieved 2.4% precision on the measurement of the Hubble constant, . As part of an ongoing effort to uncover and control systemati…
Two accurate time-delay distances from strong lensing: Implications for cosmology
S. H. Suyu, M. W. Auger, S. Hilbert +9
Strong gravitational lenses with measured time delays between the multiple images and models of the lens mass distribution allow a one-step determination of the time-delay distance…
Cosmology from gravitational lens time delays and Planck data
S. H. Suyu, T. Treu, S. Hilbert +11
Under the assumption of a flat Lambda-CDM cosmology, recent data from the Planck satellite point toward a Hubble constant that is in tension with that measured by gravitational len…
Mass calibration of distant SPT galaxy clusters through expanded weak lensing follow-up observations with HST, VLT & Gemini-South
T. Schrabback, S. Bocquet, M. Sommer +18
Expanding from previous work we present weak lensing measurements for a total sample of 30 distant () massive galaxy clusters from the South Pole Telescope…
Probing the dark-matter halos of cluster galaxies with weak lensing
E. Pastor Mira, S. Hilbert, J. Hartlap +1
Context: Understanding the evolution of the dark matter halos of galaxies after they become part of a cluster is essential for understanding the evolution of these satellite galaxi…
H0LiCOW X: Spectroscopic/imaging survey and galaxy-group identification around the strong gravitational lens system WFI2033-4723
D. Sluse, C. E. Rusu, C. D. Fassnacht +65
Galaxies and galaxy groups located along the line of sight towards gravitationally lensed quasars produce high-order perturbations of the gravitational potential at the lens positi…
Density split statistics: joint model of counts and lensing in cells
O. Friedrich, D. Gruen, J. DeRose +71
We present density split statistics, a framework that studies lensing and counts-in-cells as a function of foreground galaxy density, thereby providing a large-scale measurement of…
H0LiCOW XI. A weak lensing measurement of the external convergence in the field of the lensed quasar B1608+656 using HST and Subaru deep imaging
O. Tihhonova, F. Courbin, D. Harvey +11
We investigate the environment and line of sight of the H0LiCOW lens B1608+656 using Subaru Suprime-Cam and the Hubble Space Telescope (HST) to perform a weak lensing analysis. We…
Disorder in Diluted Spin Systems
S. Hilbert, W. Nolting
The influence of substitutional disorder on the magnetic properties of diluted Heisenberg spin systems is studied with regard to the magnetic stability of ferromagnetic diluted sem…
Time Delay Lens Modelling Challenge
X. Ding, T. Treu, S. Birrer +26
In recent years, breakthroughs in methods and data have enabled gravitational time delays to emerge as a very powerful tool to measure the Hubble constant . However, published…
H0LiCOW II. Spectroscopic survey and galaxy-group identification of the strong gravitational lens system HE0435-1223
D. Sluse, A. Sonnenfeld, N. Rumbaugh +15
Galaxies located in the environment or on the line of sight towards gravitational lenses can significantly affect lensing observables, and can lead to systematic errors on the meas…
Magnetism in (III, Mn)-V Diluted Magnetic Semiconductors: Effective Heisenberg Model
S. Hilbert, W. Nolting
The magnetic properties of the diluted magnetic semiconductors (DMS) (Ga, Mn)As and (Ga, Mn)N are investigated by means of an effective Heisenberg model, whose exchange parameters…
The origin of peak-offsets in weak-lensing maps
J. P. Dietrich, A. Böhnert, M. Lombardi +2
Centroid positions of peaks identified in weak lensing mass maps often show offsets with respect to other means of identifying halo centres, like position of the brightest cluster…
The Hubble constant and new discoveries in cosmology
S. H. Suyu, T. Treu, R. D. Blandford +22
We report the outcome of a 3-day workshop on the Hubble constant (H_0) that took place during February 6-8 2012 at the Kavli Institute for Particle Astrophysics and Cosmology, on t…
H0LiCOW V. New COSMOGRAIL time delays of HE0435-1223: to 3.8% precision from strong lensing in a flat CDM model
V. Bonvin, F. Courbin, S. H. Suyu +15
We present a new measurement of the Hubble Constant H0 and other cosmological parameters based on the joint analysis of three multiply-imaged quasar systems with measured gravitati…
Ray-tracing through the Millennium Simulation: Born corrections and lens-lens coupling in cosmic shear and galaxy-galaxy lensing
S. Hilbert, J. Hartlap, S. D. M. White +1
(abridged) We study the accuracy of various approximations to cosmic shear and weak galaxy-galaxy lensing and investigate effects of Born corrections and lens-lens coupling. We use…
H0LiCOW - IX. Cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 and a new measurement of the Hubble constant
S. Birrer, T. Treu, C. E. Rusu +15
We present a blind time-delay strong lensing (TDSL) cosmographic analysis of the doubly imaged quasar SDSS 1206+4332. We combine the relative time delay between the quasar images,…
Intrinsic galaxy shapes and alignments II: Modelling the intrinsic alignment contamination of weak lensing surveys
B. Joachimi, E. Semboloni, S. Hilbert +4
Intrinsic galaxy alignments constitute the major astrophysical systematic of forthcoming weak gravitational lensing surveys but also yield unique insights into galaxy formation and…
Intrinsic galaxy shapes and alignments I: Measuring and modelling COSMOS intrinsic galaxy ellipticities
B. Joachimi, E. Semboloni, P. E. Bett +5
The statistical properties of the ellipticities of galaxy images depend on how galaxies form and evolve, and therefore constrain models of galaxy morphology, which are key to the r…
H0LiCOW VIII. A weak lensing measurement of the external convergence in the field of the lensed quasar HE04351223
O. Tihhonova, F. Courbin, D. Harvey +10
We present a weak gravitational lensing measurement of the external convergence along the line of sight to the quadruply lensed quasar HE04351223. Using deep r-band images f…
On the contribution of large scale structure to strong gravitational lensing
C. Faure, J. -P. Kneib, S. Hilbert +8
We study the correlation between the locations of galaxy-galaxy strong lensing candidates and tracers of large-scale structure from both weak lensing or X-ray emission. The COSMOS…
Cluster Mass Calibration at High Redshift: HST Weak Lensing Analysis of 13 Distant Galaxy Clusters from the South Pole Telescope Sunyaev-Zel'dovich Survey
T. Schrabback, D. Applegate, J. P. Dietrich +26
We present an HST/ACS weak gravitational lensing analysis of 13 massive high-redshift (z_median=0.88) galaxy clusters discovered in the South Pole Telescope (SPT) Sunyaev-Zel'dovic…