STRIDES: a 3.9 per cent measurement of the Hubble constant from the strong lens system DES J0408−5354

Published

Journal Article

ABSTRACT We present a blind time-delay cosmographic analysis for the lens system DES J0408−5354. This system is extraordinary for the presence of two sets of multiple images at different redshifts, which provide the opportunity to obtain more information at the cost of increased modelling complexity with respect to previously analysed systems. We perform detailed modelling of the mass distribution for this lens system using three band Hubble Space Telescope imaging. We combine the measured time delays, line-of-sight central velocity dispersion of the deflector, and statistically constrained external convergence with our lens models to estimate two cosmological distances. We measure the ‘effective’ time-delay distance corresponding to the redshifts of the deflector and the lensed quasar $D_{\Delta t}^{\rm eff}=$$3382_{-115}^{+146}$ Mpc and the angular diameter distance to the deflector Dd = $1711_{-280}^{+376}$ Mpc, with covariance between the two distances. From these constraints on the cosmological distances, we infer the Hubble constant H0= $74.2_{-3.0}^{+2.7}$ km s−1 Mpc−1 assuming a flat ΛCDM cosmology and a uniform prior for Ωm as $\Omega _{\rm m} \sim \mathcal {U}(0.05, 0.5)$. This measurement gives the most precise constraint on H0 to date from a single lens. Our measurement is consistent with that obtained from the previous sample of six lenses analysed by the H0 Lenses in COSMOGRAIL’s Wellspring (H0LiCOW) collaboration. It is also consistent with measurements of H0 based on the local distance ladder, reinforcing the tension with the inference from early Universe probes, for example, with 2.2σ discrepancy from the cosmic microwave background measurement.

Full Text

Duke Authors

Cited Authors

  • Shajib, AJ; Birrer, S; Treu, T; Agnello, A; Buckley-Geer, EJ; Chan, JHH; Christensen, L; Lemon, C; Lin, H; Millon, M; Poh, J; Rusu, CE; Sluse, D; Spiniello, C; Chen, GC-F; Collett, T; Courbin, F; Fassnacht, CD; Frieman, J; Galan, A; Gilman, D; More, A; Anguita, T; Auger, MW; Bonvin, V; McMahon, R; Meylan, G; Wong, KC; Abbott, TMC; Annis, J; Avila, S; Bechtol, K; Brooks, D; Brout, D; Burke, DL; Carnero Rosell, A; Carrasco Kind, M; Carretero, J; Castander, FJ; Costanzi, M; da Costa, LN; De Vicente, J; Desai, S; Dietrich, JP; Doel, P; Drlica-Wagner, A; Evrard, AE; Finley, DA; Flaugher, B; Fosalba, P; García-Bellido, J; Gerdes, DW; Gruen, D; Gruendl, RA; Gschwend, J; Gutierrez, G; Hollowood, DL; Honscheid, K; Huterer, D; James, DJ; Jeltema, T; Krause, E; Kuropatkin, N; Li, TS; Lima, M; MacCrann, N; Maia, MAG; Marshall, JL; Melchior, P; Miquel, R; Ogando, RLC; Palmese, A; Paz-Chinchón, F; Plazas, AA; Romer, AK; Roodman, A; Sako, M; Sanchez, E; Santiago, B; Scarpine, V; Schubnell, M; Scolnic, D; Serrano, S; Sevilla-Noarbe, I; Smith, M; Soares-Santos, M; Suchyta, E; Tarle, G; Thomas, D; Walker, AR; Zhang, Y

Published Date

  • June 1, 2020

Published In

Volume / Issue

  • 494 / 4

Start / End Page

  • 6072 - 6102

Published By

Electronic International Standard Serial Number (EISSN)

  • 1365-2966

International Standard Serial Number (ISSN)

  • 0035-8711

Digital Object Identifier (DOI)

  • 10.1093/mnras/staa828

Language

  • en