Distances of Gravitational Lenses

Details Distances of Gravitational Lenses Distances of Gravitational Lenses

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.143b&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

As first proposed by Refsdal, gravitational lenses provide a clean way, in principle, to measure the Hubble length. All that is required is a measurement of the time delay between the variation of separate images, created through the action of a gravitational lens, an adequate model of the lens and an assumed geometry for the universe. To date, four galactic gravitational lenses have yielded accurate time delays and there are good prospects for additions to this list. In recent years techniques for modelling lenses have improved and these will be critically assessed, together with a discussion of remaining errors and uncertainties.

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