6533b830fe1ef96bd12970ac
RESEARCH PRODUCT
RXJ 0921+4529: a binary quasar or gravitational lens?
Alexei MoiseevJ. A. MuñozJelena KovacevicLuka Č. PopovićPredrag JovanovićD. IlićE. MediavillaE. Mediavillasubject
PhysicsActive galactic nucleusCosmology and Nongalactic Astrophysics (astro-ph.CO)FOS: Physical sciencesAstronomy and AstrophysicsQuasarAstrophysicsGravitational microlensingGalaxySpectral lineRedshiftGravitational lensSpace and Planetary ScienceEmission spectrumAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-09-10 |