CSL-1: chance projection effect or serendipitous discovery of a gravitational lens induced by a cosmic string?
The Capodimonte-Sternberg-Lens candidate no. 1 is an extragalactic double source detected in the Osservatorio Astronomico di Capodimonte - Deep Field. It can be interpreted either as the chance alignment of two identical galaxies at z= 0.46 or as the first case of gravitational lensing by a cosmic string. Extensive modelling shows in fact that cosmic strings are the only type of lens which (at least at low angular resolution) can produce undistorted double images of a background source. We propose an experimentum crucis to disentangle these two possible explanations. If the lensing by a cosmic string should be confirmed, it would provide the first measurements of energy scale of symmetry breaking and of the energy scale of grand unified theory.
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- August 2003
- gravitational lensing;
- galaxies: general;
- cosmology: miscellaneous;
- Accepted for publication in the Mon. Not. Royal Astron. Society