ANGLES Objectives

Our project is centred on using gravitational lensing to learn about the matter distributions of galaxies ranging in redshifts from near zero to of order unity. Multiple gravitational images of a distant background object are produced on those rare occasions when there is almost perfect alignment between an intervening galaxy and the distant object. Radiation is deflected in the gravitational field of the galaxy usually resulting in two or four magnified and distorted images of the background object. The magnifications, distortions and relative positions of the images give unique information about the distribution of matter in the galaxy doing the lensing. In addition, the interstellar medium within the lensing galaxy also often leaves its mark on the radiation that has passed through, telling us about the prevailing conditions in these lensing galaxies. A further bonus of the lensing process is that the light paths for the images are not the same. If the background object is variable we can measure a time delay and hence determine the Hubble constant.

We will focus on four main project objectives:

At the completion of the project we expect:

For more details of the scientific programme download the ANGLES science case (Word format) taken from the original proposal.

Last modified: January 19, 2005
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