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https://research.matf.bg.ac.rs/handle/123456789/59| Title: | RXJ 0921+4529: A binary quasar or a gravitational lens? | Authors: | Popović, L. Č Moiseev, A. V. Mediavilla, E. Jovanović, P. Ilić, Dragana Kova Čević, J. Muñoz, J. A. |
Affiliations: | Astronomy | Keywords: | Galaxies: active;Quasars: emission lines | Issue Date: | 1-Oct-2010 | Journal: | Astrophysical Journal Letters | 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. © 2010. The American Astronomical Society. All rights reserved. |
URI: | https://research.matf.bg.ac.rs/handle/123456789/59 | ISSN: | 20418205 | DOI: | 10.1088/2041-8205/721/2/L139 |
| Appears in Collections: | Research outputs |
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