Further spectroscopic observations of the CSL-1 object
Astrophysics
2009-11-11 v3
Abstract
CSL-1 is a peculiar object (R.A._{2000}= 12h 23m 30.5"; Dec_{2000}= -12deg 38' 57.0") which, for its photometric and spectroscopic properties, is possibly the first case of gravitational lensing by a cosmic string. In this paper we present additional evidences, based on medium-high resolution VLT + FORS1 observations, that the spectra of the two components of CSL-1 are identical within a confidence level higher than 99.9% and the velocity difference of the two components is consistent with zero. This result adds further confidence to the interpretation of the system as a true lens.
Keywords
Cite
@article{arxiv.astro-ph/0506400,
title = {Further spectroscopic observations of the CSL-1 object},
author = {M. Sazhin and M. Capaccioli and G. Longo and M. Paolillo and O. Khovanskaya},
journal= {arXiv preprint arXiv:astro-ph/0506400},
year = {2009}
}
Comments
In press on ApJ Letters. 10 pages, 3 figures - Accepted version with additional statistical evidence