2020MNRAS.494.6072S

Query : 2020MNRAS.494.6072S

2020MNRAS.494.6072S - Mon. Not. R. Astron. Soc., 494, 6072-6102 (2020/June-1)

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

SHAJIB A.J., BIRRER S., TREU T., AGNELLO A., BUCKLEY-GEER E.J., CHAN J.H.H., CHRISTENSEN L., LEMON C., LIN H., MILLON M., POH J., RUSU C.E., SLUSE D., SPINIELLO C., CHEN G.C.-F., COLLETT T., COURBIN F., FASSNACHT C.D., FRIEMAN J., GALAN A., GILMAN D., MORE A., ANGUITA T., AUGER M.W., BONVIN V., McMAHON R., MEYLAN G., WONG K.C., ABBOTT T.M.C., ANNIS J., AVILA S., BECHTOL K., BROOKS D., BROUT D., BURKE D.L., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., CASTANDER F.J., COSTANZI M., DA COSTA L.N., DE VICENTE J., DESAI S., DIETRICH J.P., DOEL P., DRLICA-WAGNER A., EVRARD A.E., FINLEY D.A., FLAUGHER B., FOSALBA P., GARCIA-BELLIDO J., GERDES D.W., GRUEN D., GRUENDL R.A., GSCHWEND J., GUTIERREZ G., HOLLOWOOD D.L., HONSCHEID K., HUTERER D., JAMES D.J., JELTEMA T., KRAUSE E., KUROPATKIN N., LI T.S., LIMA M., MacCRANN N., MAIA M.A.G., MARSHALL J.L., MELCHIOR P., MIQUEL R., OGANDO R.L.C., PALMESE A., PAZ-CHINCHON F., PLAZAS A.A., ROMER A.K., 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 A.R. and ZHANG Y.

Abstract (from CDS):

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_Δt_^ 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 Ω_ m_ ∼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.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: strong - cosmological parameters - distance scale - cosmology: observations

Nomenclature: Fig. 1, Table 2: [SBT2020] DES J0408-5354 GN (Nos G3-G6), [SBT2020] DES J0408-5354 SN (Nos S1-S3).

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [ALB2017] DES J0408-5354 G2 G 04 08 21.49 -53 54 00.3           ~ 3 0
2 [ALB2017] DES J0408-5354 C LeQ 04 08 21.49 -53 54 00.3           ~ 3 0
3 [ALB2017] DES J0408-5354 B LeQ 04 08 21.49 -53 53 59.2           ~ 5 0
4 [ALB2017] DES J0408-5354 G4 G 04 08 21.66 -53 54 12.9           ~ 1 0
5 [ALB2017] DES J0408-5354 gLS 04 08 21.70 -53 53 59.6           ~ 37 0
6 [ALB2017] DES J0408-5354 G1 G 04 08 21.70 -53 53 59.6           ~ 6 0
7 [ALB2017] DES J0408-5354 D LeQ 04 08 21.71 -53 53 58.1           ~ 5 0
8 [ALB2017] DES J0408-5354 G3 G 04 08 21.79 -53 53 59.4           ~ 2 0
9 [ALB2017] DES J0408-5354 G0 G 04 08 21.83 -53 54 05.9           ~ 3 0
10 [ALB2017] DES J0408-5354 A LeQ 04 08 21.9440821536 -53 54 00.873496512           ~ 5 0
11 [ALB2017] DES J0408-5354 G5 G 04 08 22.31 -53 54 00.1           ~ 1 0
12 [ALB2017] DES J0408-5354 G6 G 04 08 22.94 -53 53 53.8           ~ 1 0
13 [VV2006] J043814.8-122314 QSO 04 38 14.88 -12 17 14.6     17.15     ~ 245 2
14 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 703 2
15 2MASS J11315154-1231588 Sy1 11 31 51.5387 -12 31 58.716           ~ 304 1
16 [OIH2005] SDSS J1206+4332 gLS 12 06 29.6 +43 32 17           ~ 63 0
17 NVSS J160914+653229 rG 16 09 13.93704 +65 32 27.9024     19.4     ~ 215 0
18 [VV2006] J203342.1-472343 QSO 20 33 42.12 -47 23 43.9           ~ 135 1

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