A SHARP view of H0LiCOW: H-0 from three time-delay gravitational lens systems with adaptive optics imagingChen, G. C. -F., Fassnacht, C. D., Suyu, S. H., Rusu, C. E., Chan, J. H. H., Wong, K. C., Auger, M. W., Hilbert, S., Bonvin, V., Birrer, S., Millon, M., Koopmans, L. V. E., Lagattuta, D. J., McKean, J. P., Vegetti, S., Courbin, F., Ding, X., Halkola, A., Jee, I., Shajib, A. J., Sluse, D., Sonnenfeld, A. & Treu, T., Dec-2019, In : Monthly Notices of the Royal Astronomical Society. 490, 2, p. 1743-1773 31 p.
Research output: Contribution to journal › Article › Academic › peer-review
We present the measurement of the Hubble constant, H-0, with three strong gravitational lens systems, We describe a blind analysis of both PG 1115+080 and 11E0435-1223 as well as an extension of our previous analysis of RXJ 1131-1231. For each lens, we combine new adaptive optics (AO) imaging from the Keck Telescope, obtained as part of the SHARP (Strong-lensing High Angular Resolution Programme) AO effort, with Hubble Space Telescope (HST) imaging, velocity dispersion measurements, and a description of the line-of-sight mass distribution to build an accurate and precise lens mass model. This mass model is then combined with the COSMOGRAIL-measured time delays in these systems to determine Ho. We do both an AO only and an AO + HST analysis of the systems and find that AO and HST results are consistent. After unblinding, the AO-only analysis gives H-0 = 82.8(-8.3)(+9.4) km s(-1) Mpc(-1) for PG 1115+080, H-0 = 70.1(-4.5)(+5.3) km s(-1) Mpc(-1) for HE 0435-1223, and H-0 = 77.0(-4.6)(+4.0) km s(-1) Mpc(-1) for RXJ 1131-1231. The joint AO-only result for the three lenses is H-0 = 75.6(-3.3)(+3.2) km s(-1) Mpc(-1). The joint result of the AO + HST analysis for the three lenses is H-0 = 76.8(-2.6)(+2.6) km s(-1) Mpc(-1). All of these results assume a flat A cold dark matter cosmology with a uniform prior on Omega(m) in [0.05, 0.5] and H-0 in [0, 150] km s(-1) Mpc(-1). This work is a collaboration of the SHARP and H0LiCOW teams, and shows that AO data can be used as the high-resolution imaging component in lens-based measurements of H-0. The full time-delay cosmography results from a total of six strongly lensed systems are presented in a companion paper.
|Number of pages||31|
|Journal||Monthly Notices of the Royal Astronomical Society|
|Publication status||Published - Dec-2019|
- gravitational lensing: strong, instrumentation: adaptive optics, distance scale, EARLY-TYPE GALAXIES, BARYON ACOUSTIC-OSCILLATIONS, EDGE-ON DISC, DARK-MATTER, HUBBLE CONSTANT, SPECTROSCOPIC SURVEY, DATA RELEASE, PHOTOMETRIC REDSHIFTS, MASS STRUCTURE, EINSTEIN RING