SIMBAD references

2010ApJ...716L.185L - Astrophys. J., 716, L185-L189 (2010/June-3)

Adaptive optics observations of B0128+437: a low-mass, high-redshift gravitational lens.


Abstract (from CDS):

We use high-resolution adaptive optics (AO) imaging on the Keck II telescope to study the gravitational lens B0128+437 in unprecedented detail, allowing us to resolve individual lensed quasar components and, for the first time, detect and measure properties of the lensing galaxy. B0128+437 is a small-separation lens with known flux-ratio and astrometric anomalies. We discuss possible causes for these anomalies, including the presence of substructure in the lensing galaxy, propagation effects due to dust and a turbulent interstellar medium, and gravitational microlensing. This work demonstrates that AO will be an essential tool for studying the many new small-separation lenses expected from future surveys.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: individual: CLASS B0128+437 - gravitational lensing: strong - infrared: galaxies

Simbad objects: 12

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