First estimate of the time delay in HE 1104-1805
| dc.creator | Wisotzki, Lutz | |
| dc.creator | Wucknitz, Olaf | |
| dc.creator | Lopez, Sebastian | |
| dc.creator | Soerensen, Anton Norup | |
| dc.date | 1998-10-12 | |
| dc.date.accessioned | 2026-07-07T02:28:21Z | |
| dc.date.available | 2026-07-07T02:28:21Z | |
| dc.description | We present first results from five years of spectrophotometric monitoring of the bright double QSO and gravitational lens HE 1104-1805. The quasar has varied considerably over this time, while the emission line fluxes appear to have remained constant. We have constructed monochromatic continuum light curves for components A and B, finding that B leads the variability. A quantitative analysis with the Pelt method gives a best estimate for the light travel time delay of about 0.73 years, although a value as low as 0.3 cannot yet be excluded. We discuss possible models for the QSO-lens configuration and use our measured time delay to predict the redshift of the lens, z_d. Finding that most likely z_d < 1, we can rule out the hitherto favoured values of z_d = 1.32 or 1.66. A new candidate is an absorption system at z=0.73, but the lens could also be an elliptical not detected in absorption. | |
| dc.description | 4 pages, 4 figures, accepted for A&A, Letters to the editor | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9810181 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9810181 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/13087 | |
| dc.subject | Astrophysics | |
| dc.title | First estimate of the time delay in HE 1104-1805 | |
| dc.type | text |