Pixellated Lenses and Estimates of H_0 from Time-delay Quasars
| dc.creator | Williams, Liliya L. R. | |
| dc.creator | Saha, Prasenjit | |
| dc.date | 1999-09-14 | |
| dc.date.accessioned | 2026-07-07T02:33:16Z | |
| dc.date.available | 2026-07-07T02:33:16Z | |
| dc.description | The largest source of uncertainty in the determination of H_0 from a multiply-imaged QSO system is the unknown mass distribution in the lensing galaxy. Parametric models severely restrict the shape of the galaxy thereby underestimating errors and biasing the best estimate of H_0. We present a method that explores the whole of the model space allowed by the image observables and a few general properties of galaxies. We describe blind test of the method and then apply it to PG1115+080 and B1608+656 which yield H_0 between 45 and 80 km/s/Mpc at 90% confidence level, with the best estimate of 60 km/s/Mpc. | |
| dc.description | 4 pages incl 4 figures. Contributed talk to "Gravitational Lensing: Recent Progress and Future Goals", Boston University, MA, July 1999, eds. T.G. Brainerd and C.S. Kochanek | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9909248 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9909248 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14778 | |
| dc.subject | Astrophysics | |
| dc.title | Pixellated Lenses and Estimates of H_0 from Time-delay Quasars | |
| dc.type | text |