RXJ 0921+4529: a binary quasar or gravitational lens?
Cosmology and Nongalactic Astrophysics
2016-08-14 v1
Abstract
We report the new spectroscopic observations of the gravitational lens RXJ 021+4529 with the multi-mode focal reducer SCORPIO of the SAO RAS 6-m telescope. The new spectral observations were compared with the previously observed spectra of components A and B of RXJ 0921+4529, i.e. the same components observed in different epochs. We found a significant difference in the spectrum between the components that cannot be explained with microlensing and/or spectral variation. We conclude that RXJ 0921+4529 is a binary quasar system, where redshifts of quasars A and B are 1.6535 +/- 0.0005 and 1.6625 +/- 0.0015, respectively.
Cite
@article{arxiv.1008.4156,
title = {RXJ 0921+4529: a binary quasar or gravitational lens?},
author = {L. Č. Popović and A. V. Moiseev and E. Mediavilla and P. Jovanović and D. Ilić and J. Kovačević and J. Muñoz},
journal= {arXiv preprint arXiv:1008.4156},
year = {2016}
}
Comments
6 pages, 5 figures, accepted for publication in The Astrophysical Journal Letters