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SERENDIPITOUS DISCOVERY OF A PROJECTED PAIR OF QSOs SEPARATED BY 4.5 arcsec ON THE SKY
| Indexado |
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| DOI | 10.3847/0004-6256/152/1/13 | ||||
| Año | 2016 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
We present the serendipitous discovery of a projected pair of quasi-stellar objects (QSOs) with an angular separation of Delta theta = 4.50 arcsec. The redshifts of the two QSOs are widely different: one, our program target, is a QSO with a spectrum consistent with being a narrow line Seyfert 1 active galactic nucleus at z = 2.05. For this target we detect Ly alpha, C IV, and C III]. The other QSO, which by chance was included on the spectroscopic slit, is a Type 1 QSO at a redshift of z = 1.68, for which we detect C IV, CIII], and Mg II. We compare this system to previously detected projected QSO pairs and find that only about a dozen previously known pairs have smaller angular separation.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Heintz, K. E. | Hombre |
Univ Copenhagen - Dinamarca
Niels Bohr Institute - Dinamarca Niels Bohr Institutet - Dinamarca |
| 2 | Fynbo, J. P. U. | Hombre |
Univ Copenhagen - Dinamarca
Niels Bohr Institute - Dinamarca Niels Bohr Institutet - Dinamarca |
| 3 | Krogager, J. K. | Hombre |
Univ Copenhagen - Dinamarca
Niels Bohr Institute - Dinamarca Institut d 'Astrophysique de Paris - Francia Niels Bohr Institutet - Dinamarca Institut d’Astrophysique de Paris - Francia |
| 4 | Vestergaard, M. | Mujer |
Univ Copenhagen - Dinamarca
UNIV ARIZONA - Estados Unidos Niels Bohr Institute - Dinamarca The University of Arizona - Estados Unidos Niels Bohr Institutet - Dinamarca |
| 5 | Moller, P. | Hombre |
ESO - Alemania
Observatorio Europeo Austral - Alemania |
| 6 | Arabsalmani, M. | - |
ESO - Alemania
Observatorio Europeo Austral - Alemania |
| 7 | Geier, S. | Hombre |
Gran Telescopio Canarias GRANTECAN - España
Inst Astrofis Canarias - España Gran Telescopio Canarias (GRANTECAN) - España Instituto Astrofisico de Canarias - España |
| 8 | Noterdaeme, Pasquier | - |
UPMC - Francia
Institut d 'Astrophysique de Paris - Francia Institut d’Astrophysique de Paris - Francia |
| 9 | Ledoux, Cedric | Hombre |
ESO - Chile
European Southern Observatory Santiago - Chile Observatorio Europeo Austral - Chile Observatorio Europeo Austral - Alemania |
| 10 | Saturni, F. G. | - |
Univ Roma La Sapienza - Italia
Università degli Studi di Roma La Sapienza - Italia Sapienza Università di Roma - Italia |
| 11 | Venemans, B. P. | Hombre |
Max Planck Inst Astron - Alemania
Max Planck Institute for Astronomy - Alemania |
| Fuente |
|---|
| ERC |
| Seventh Framework Programme |
| Alfred P. Sloan Foundation |
| U.S. Department of Energy Office of Science |
| Center for High Performance Computing at the University of Utah |
| Danish Council for Independent Research |
| European Research Council under European Union/ERC |
| Agradecimiento |
|---|
| We wish to thank the anonymous referee for the helpful comments that improved the quality of this work. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Program (FP7/2007-2013)/ERC Grant agreement No. EGGS-278202. The data presented here were obtained with ALFOSC, which is provided by the Instituto de Astrofisica de Andalucia (IAA) under a joint agreement with the University of Copenhagen and NOTSA. B.V. acknowledges funding through the ERC grant Cosmic Dawn. M.V. gratefully acknowledges support from the Danish Council for Independent Research via grant No. DFF 4002-00275. Funding for the Sloan Digital Sky Survey III has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High Performance Computing at the University of Utah. The SDSS website is www.sdss.org. |
