Bibcode
Popović, L. Č.; Moiseev, A. V.; Mediavilla, E.; Jovanović, P.; Ilić, D.; Kovačević, J.; Muñoz, J. A.
Bibliographical reference
The Astrophysical Journal Letters, Volume 721, Issue 2, pp. L139-L142 (2010).
Advertised on:
10
2010
Citations
4
Refereed citations
4
Description
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.
Related projects
Relativistic and Theoretical Astrophysics
Introduction Gravitational lenses are a powerful tool for Astrophysics and Cosmology. The goals of this project are: i) to obtain a robust determination of the Hubble constant from the time delay measured between the images of a lensed quasar; ii) to study the individual and statistical properties of dark matter condensations in lens galaxies from
Evencio
Mediavilla Gradolph