The DUEL (Dark Universe with Extragalactic Lensing) Network:
The DUEL network is a European Community Research and Training Network, composed of researchers in Gravitational Lensing at Astronomical Institutes in:
3. Institut d’Astrophysique de Paris (IAP),
4. Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Capodimonte, Naples [OAC]
5. Ruprecht-Karls-Universitaet Heidelberg [ITA]
6. Rheinische Friedrich-Wilhelms-Universitaet Bonn [AIfA]
7. Ludwig Maximillians Universitaet Muenchen [USM]
The Network starts in January 2007 and will run for 4 years.
The aims of DUEL are to
exploit imminent, large-scale imaging and multi-wavelength galaxy surveys and
prepare for future gravitational lensing surveys. The analysis of these surveys will map out the 3-dimensional distribution
of Dark Matter over a large volume of the observable Unive
The DUEL Network will study the growth of structure using weak gravitational lensing, a technique that has been in development since the 1990s. It involves measuring shapes of galaxies very accurately, and deducing coherent distortion patterns from these: they are the signature of gravitational fields along the line of sight. It is possible to disentangle the distortion pattern and deduce the distribution of the (mostly dark) matter responsible for them. By mapping out the evolution of the distribution pattern with distance to the source galaxies, we can trace the growth of structure, and this is the fundamental diagnostic we are targeting. We will then address several major cosmological questions that can be explored with weak lensing information: the properties and evolution of dark energy in the universe, the properties of dark matter distribution and its relation with the inflation period that occurred during the very early stage of the universe the universe, and the relations between luminous and dark matter and its relation with galaxy formation processes.
order to study weak lensing, we are participating in and will analyse three
large astronomical surveys that are being conducted specifically for this
The Network will be appointing 7 PhD students and 7 Postdoctoral Fellows in the next few years, who will each specialize in one of these aspects, while at the same time acquiring a working knowledge of the other facets of the project. As a result, they should be well-trained to be a part of future generations of similar surveys, using facilities on earth and in space that are now on the drawing board.
For further information about the DUEL Network contact:
Dr Andrew N. Taylor
Institute for Astronomy