Distances on Cosmological Scales with VLTI

Details Distances on Cosmological Scales with VLTI Distances on Cosmological Scales with VLTI

2003-03-19

arxiv.org/abs/astro-ph/0303445v1

Astrophys.Space Sci. 286 (2003) 261-266

Astronomy and Astrophysics

Astrophysics

6 pages, 2 postscript figures, to appear in the proceedings of the JENAM 2002 Workshop WS-VLTI "The Very Large Telescope Inter

Scientific paper

10.1023/A:1026104932701

We present here a new method using interferometric measurements of quasars, that allows the determination of direct geometrical distances on cosmic scales. Quasar Broad Emission Line Regions sizes provide a "meter rule" with which to measure the metric of the Universe. This method is less dependent of model assumptions, and even of variations in the fundamental constants (other than c). We discuss the spectral and spatial requirements on the VLTI observations needed to carry out these measurements.

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