TDCOSMO XXVIII. The Hubble constant from the quadruply lensed quasar J1537−3010 with precise time delays
Abstract
We present the first measurement of the Hubble constant (H0) from the quadruply-lensed quasar J1537−3010, which has optically-measured time delays at ∼2 % precision. We combine these delays with multi-band imaging data from the Hubble Space Telescope (HST) and model the system with two independent software and teams. We adopt a mass profile that is maximally degenerate with H0 to fully incorporate the mass-sheet degeneracy in the error budget, with nuisance parameters constrained by spatially resolved stellar kinematics from the Multi Unit Spectroscopic Explorer (MUSE) and a line-of-sight (LoS) analysis using the Euclid Flagship simulation. The entire analysis is performed blindly to H0, distances and mass density slope of the main deflector. After unblinding, we measure H0 = 75.5+9.3−5.8 km s−1 Mpc−1, corresponding to a 10% precision measurement from a single system. This precision is driven by conservative lens modeling assumptions including differences between lens modeling methods and the limited stellar kinematics constraints, from which we infer a total mass-sheet parameter λ≡(1−κext)λint = 0.89+0.11−0.06 (λint=0.89+0.09−0.07) that is consistent with current results for elliptical galaxies (λ≈ 1). Our lensing constraints, stellar kinematic measurements and LoS characterization will be included in subsequent population-level measurements of H0. Moreover, our lens models combined with future near-infrared spectroscopy and imaging from the James Webb Space Telescope will further reduce the uncertainties on H0 from J1537−3010 alone, bringing it closer to the few percents precision of the time delays.
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BibTeX
@misc{galan2026tdcosmo,
title = {{TDCOSMO XXVIII. The Hubble constant from the quadruply lensed quasar J1537$-$3010 with precise time delays}},
author = {A Galan and A.G Schweinfurth and S.H Suyu and D.P Johnson and A Chawla and D Sluse and G.V Kharchilava and E Buckley-Geer and H Lin and S Knabel and W Sheu and S Ertl and T Anguita and S Birrer and F Courbin and F Dux and M Millon and V Motta and S Schuldt and T Treu and D.M Williams and M Cappellari and K.C Wong and D Eckert},
howpublished = {HAL},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.00179},
eprint = {2609.00179},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05741427v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - TDCOSMO XXVIII. The Hubble constant from the quadruply lensed quasar J1537−3010 with precise time delays
AU - A Galan
AU - A.G Schweinfurth
AU - S.H Suyu
AU - D.P Johnson
AU - A Chawla
AU - D Sluse
AU - G.V Kharchilava
AU - E Buckley-Geer
AU - H Lin
AU - S Knabel
AU - W Sheu
AU - S Ertl
AU - T Anguita
AU - S Birrer
AU - F Courbin
AU - F Dux
AU - M Millon
AU - V Motta
AU - S Schuldt
AU - T Treu
AU - D.M Williams
AU - M Cappellari
AU - K.C Wong
AU - D Eckert
PY - 2026
DA - 2026/09/01
PB - HAL
DO - 10.48550/arxiv.2609.00179
UR - https://hal.science/hal-05741427v1
AB - We present the first measurement of the Hubble constant (H_0) from the quadruply-lensed quasar J1537−3010, which has optically-measured time delays at ∼2 % precision. We combine these delays with multi-band imaging data from the Hubble Space Telescope (HST) and model the system with two independent software and teams. We adopt a mass profile that is maximally degenerate with H_0 to fully incorporate the mass-sheet degeneracy in the error budget, with nuisance parameters constrained by spatially resolved stellar kinematics from the Multi Unit Spectroscopic Explorer (MUSE) and a line-of-sight (LoS) analysis using the Euclid Flagship simulation. The entire analysis is performed blindly to H_0, distances and mass density slope of the main deflector. After unblinding, we measure H_0 = 75.5^+9.3_−5.8 km s^−1 Mpc^−1, corresponding to a 10% precision measurement from a single system. This precision is driven by conservative lens modeling assumptions including differences between lens modeling methods and the limited stellar kinematics constraints, from which we infer a total mass-sheet parameter λ≡(1−κ_ext)λ_int = 0.89^+0.11_−0.06 (λ_int=0.89^+0.09_−0.07) that is consistent with current results for elliptical galaxies (λ≈ 1). Our lensing constraints, stellar kinematic measurements and LoS characterization will be included in subsequent population-level measurements of H_0. Moreover, our lens models combined with future near-infrared spectroscopy and imaging from the James Webb Space Telescope will further reduce the uncertainties on H_0 from J1537−3010 alone, bringing it closer to the few percents precision of the time delays.
ER -