Detection of the Galaxy Lensing the Doubly–imaged Quasar Sbs 1520+530
نویسندگان
چکیده
H band observations with a spatial resolution of 0. 15 carried out with the Canada-France-Hawaii Telescope adaptive optics system show a galaxy between the components of the double BAL QSO SBS 1520+530, thereby confirming this system as a gravitational lens. The galaxy is located 0. 40 from the fainter of the two QSO images and is offset 0. 12 from the line joining them. The H magnitude of the lensing galaxy is ∼1 mag fainter than expected from the velocity dispersion derived for the lensing galaxy were it at z = 0.72 or z = 0.81, the redshifts of the two absorption line systems. Subject headings: Galaxies: Quasars: individual (SBS 1520+530) – Gravitational lenses – Quasars
منابع مشابه
The lensing system towards the doubly imaged quasar SBS 1520 + 530 ⋆
The gravitational potential responsible for the lensing effect in SBS 1520+530 is studied over length scales from a few arc-seconds to a few arc-minutes. For this purpose, we use sharply deconvolved Hubble Space Telescope images in the optical and near-IR, in combination with ground based optical data obtained over a wider field-of-view. In particular, we have carried out a multi-color analysis...
متن کاملLens Galaxy Properties of Sbs 1520+530: Insights from Keck Spectroscopy and Ao Imaging
We report on an investigation of the SBS 1520+530 gravitational lens system. We have used archivalHubble Space Telescope (HST ) imaging,Keck spectroscopic data, andKeck adaptive optics (AO) imaging to study the lensing galaxy and its environment. The AO imaging has allowed us to fix the lens galaxy properties with a high degree of accuracy when performing the lens modeling, and the data indicat...
متن کاملDetection of the Galaxy Lensing
H band observations with a spatial resolution of 0: 00 15 carried out with the Canada-France-Hawaii Telescope adaptive optics system show a galaxy between the components of the double BAL QSO SBS 1520+530, thereby connrming this system as a gravitational lens. The galaxy is located 0: 00 40 from the fainter of the two QSO images and is ooset 0: 00 12 from the line joining them. The H magnitude ...
متن کاملGravitational Lensing in Astronomy
Deflection of light by gravity was predicted by General Relativity and observationally confirmed in 1919. In the following decades, various aspects of the gravitational lens effect were explored theoretically. Among them were: the possibility of multiple or ring-like images of background sources, the use of lensing as a gravitational telescope on very faint and distant objects, and the possibil...
متن کاملStrong Lensing by Subhalos in the Dwarf-galaxy Mass Range Ii: Detection Probabilities
The dark halo substructures predicted by current cold dark matter simulations may in principle be detectable through strong-lensing image splitting of quasars on small angular scales (0.01 arcseconds or below). Here, we estimate the overall probabilities for lensing by substructures in a host halo closely aligned to the line of sight to a background quasar. Under the assumption that the quasar ...
متن کامل