Search Publications
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
Petitjean, Patrick; Ross, Nicholas P.; Bailey, Stephen +70 more
We present cosmological results from the final galaxy clustering data set of the Baryon Oscillation Spectroscopic Survey, part of the Sloan Digital Sky Survey III. Our combined galaxy sample comprises 1.2 million massive galaxies over an effective area of 9329 deg2 and volume of 18.7 Gpc3, divided into three partially overlap…
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing
Simon, P.; Heymans, C.; Choi, A. +33 more
We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ∼450 deg2 of imaging data from the Kilo Degree Survey (KiDS). For a flat Λ cold dark matter (ΛCDM) cosmology with a prior on H0 that encompasses the most recent direct measurements, we find S_8≡ σ _8√{Ω _m/0.3}=0.745± 0.039…
Cosmic microwave background limits on accreting primordial black holes
Kamionkowski, Marc; Ali-Haïmoud, Yacine
Interest in the idea that primordial black holes (PBHs) might comprise some or all of the dark matter has recently been rekindled following LIGO's first direct detection of a binary-black-hole merger. Here we revisit the effect of accreting PBHs on the cosmic microwave background (CMB) frequency spectrum and the angular temperature and polarizatio…
H0LiCOW - V. New COSMOGRAIL time delays of HE 0435-1223: H0 to 3.8 per cent precision from strong lensing in a flat ΛCDM model
Treu, T.; Auger, M. W.; Koopmans, L. V. E. +15 more
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 gravitational time delays. First, we measure the time delay of HE 0435-1223 from 13-yr light curves obtained as part of the COSMOGRAIL project. Companion papers detail…
Can interacting dark energy solve the H0 tension?
Di Valentino, Eleonora; Melchiorri, Alessandro; Mena, Olga
The answer is yes. We indeed find that interacting dark energy can alleviate the current tension on the value of the Hubble constant H0 between the cosmic microwave background anisotropies constraints obtained from the Planck satellite and the recent direct measurements reported by Riess et al. 2016. The combination of these two data se…
Unveiling ν secrets with cosmological data: Neutrino masses and mass hierarchy
Ho, Shirley; Mena, Olga; Gerbino, Martina +4 more
Using some of the latest cosmological data sets publicly available, we derive the strongest bounds in the literature on the sum of the three active neutrino masses, Mν, within the assumption of a background flat Λ CDM cosmology. In the most conservative scheme, combining Planck cosmic microwave background temperature anisotropies and ba…
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: anisotropic galaxy clustering in Fourier space
Ross, Nicholas P.; Schneider, Donald P.; Eisenstein, Daniel J. +20 more
We investigate the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 sample, which consists of 1198 006 galaxies in the redshift range 0.2 < z < 0.75 and a sky coverage of 10 252 deg2. We analyse this data set in Fourier space, using the power-spectrum multipoles to measure redshift-space…
Global constraints on absolute neutrino masses and their ordering
Di Valentino, Eleonora; Melchiorri, Alessandro; Capozzi, Francesco +3 more
Within the standard three-neutrino framework, the absolute neutrino masses and their ordering (either normal, NO, or inverted, IO) are currently unknown. However, the combination of current data coming from oscillation experiments, neutrinoless double beta (0 ν β β ) decay searches, and cosmological surveys, can provide interesting constraints for…
CMB bounds on disk-accreting massive primordial black holes
Calore, Francesca; Kohri, Kazunori; Poulin, Vivian +2 more
Stellar-mass primordial black holes (PBH) have been recently reconsidered as a dark matter (DM) candidate after the aLIGO discovery of several binary black hole (BH) mergers with masses of tens of M⊙ . Matter accretion on such massive objects leads to the emission of high-energy photons, capable of altering the ionization and thermal hi…
CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics
Heymans, Catherine; van Waerbeke, Ludovic; Choi, Ami +9 more
We investigate the impact of astrophysical systematics on cosmic shear cosmological parameter constraints from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) and the concordance with cosmic microwave background measurements by Planck. We present updated CFHTLenS cosmic shear tomography measurements extended to degree scales using a c…