COSMOLOGY FROM GRAVITATIONAL LENS TIME DELAYS AND PLANCK DATA

By Sherry H. Suyu, T. Treu, Stefan Hilbert, A. Sonnenfeld, M. Auger, R. Blandford, T. Collett, F. Courbin, C. Fassnacht, Leon V. E. Koopmans and 4 more. 2013

157 citations recorded by the source corpus.

Under the assumption of a flat ΛCDM cosmology, recent data from the Planck satellite point toward a Hubble constant that is in tension with that measured by gravitational lens time delays and by the local distance ladder. Prosaically, this difference could arise from unknown systematic uncertainties in some of the measurements. More interestingly—if systematics were ruled out—resolving the tension would require a departure from the flat ΛCDM cosmology, introducing, for example, a modest amount of spatial curvature, or a non-trivial dark energy equation of state. To begin to address these issues, we present an analysis of the gravitational lens RXJ1131−1231 that is improved in one particular regard: we examine the issue of systematic error introduced by an assumed lens model density profile. We use more flexible gravitational lens models with baryonic and dark matter components, and find that the exquisite Hubble Space Telescope image with thousands of intensity pixels in the Einstein ring and the stellar velocity dispersion of the lens contain sufficient information to constrain these more flexible models. The total uncertainty on the time-delay distance is 6.6% for a single system. We proceed to combine our improved time-delay distance measurement with the WMAP9 and Planck posteriors. In an open ΛCDM model, the data for RXJ1131−1231 in combination with Planck favor a flat universe with (68% credible interval (CI)). In a flat wCDM model, the combination of RXJ1131−1231 and Planck yields (68% CI).

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/f8b29202d74376085e301bd84d57ca33487a1877

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Citations in the corpus

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 (2016, methodology): “…by Suyu et al. (2010) and Suyu et al. (2013), re-weighting the WMAP and Planck posterior samples with the TDSL likelihoods from the analyses of B1608+656 (Suyu et al. 2010), RXJ1131−1231 (Suyu et al. 2014) and HE 0435−1223 (H0LiCOW Paper IV), for the set cosmological models described in Table 2.”
THE GRISM LENS-AMPLIFIED SURVEY FROM SPACE (GLASS). I. SURVEY OVERVIEW AND FIRST DATA RELEASE (2015, background): “Typically, the deflectors are galaxies, for which the gravitational potential can be sufficiently well constrained by extended gravitational arcs and stellar kinematics (Treu & Koopmans 2002; Suyu et al. 2014).”
THE POPULATION OF GALAXY–GALAXY STRONG LENSES IN FORTHCOMING OPTICAL IMAGING SURVEYS (2015, background): “…2010; Barnabè et al. 2011), the dark sub-halo population (Vegetti et al. 2014), cosmological parameters (Collett & Auger 2014; Oguri et al. 2012; Suyu et al. 2014), the high redshift luminosity function (Barone-Nugent et al. 2015) and the nature of high redshift sources (e.g. Newton et al.…”
H0LiCOW – I. H0 Lenses in COSMOGRAIL's wellspring: program overview (2016, methodology): “…lens modeling techniques (Suyu et al. 2009; Suyu & Halkola 2010; Suyu et al. 2012b, Suyu et al. in preparation) and kinematic modeling methods (Auger et al. 2010; Sonnenfeld et al. 2012) to obtain the lens mass distribution with a few percent uncertainty (e.g., Suyu et al. 2013, 2014).”
Time delay cosmography (2016, methodology): “Suyu et al. (2014) fitted the same two models used by Schneider and Sluse (2013) to the current state-of-the-art Einstein ring imaging and lens galaxy velocity dispersion data, and found that present measurements of stellar kinematics reduce the error by a factor of 10, at least within their…”
TDCOSMO IV: Hierarchical time-delay cosmography -- joint inference of the Hubble constant and galaxy density profiles (2020, methodology): “The imaging modeling is presented by Suyu et al. (2014) (for HST) and Chen et al. (2019) (for Keck Adaptive Optics data).”
H0LiCOW - IV. Lens mass model of HE 0435-1223 and blind measurement of its time-delay distance for cosmology (2016, methodology): “HE 0435−1223 is the third H0LiCOW system analyzed in this manner, following B1608+656 (Suyu et al. 2010) and RXJ1131−1231 (Suyu et al. 2013, 2014).”
TDCOSMO. I. An exploration of systematic uncertainties in the inference of $H_0$ from time-delay cosmography (2019, methodology): “Although not used by the TDCOSMO collaboration, except in the analysis of RX J1131−1231 by Suyu et al. (2014) who found negligible core size, we tested cored power-law profiles on simulated lenses in Sect.”