2024-03-29T11:08:52Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1099912021-10-28T15:40:38Zcom_10261_45com_10261_4com_10261_97com_10261_37col_10261_298col_10261_350col_10261_290
The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41
Matute, Israel
Masegosa, Josefa
Márquez, Isabel
Fernández-Soto, Alberto
Husillos, César
Olmo, Ascensión del
Perea, Jaime
Pović, Mirjana
Ascaso, Begoña
Alfaro, Emilio J.
Moles, Mariano
Aguerri, J.A.L.
Aparicio Villegas, Teresa
Benítez, Narciso
Broadhurst, T.
Cabrera-Caño, Jesús
Castander, Francisco J.
Cepa, Jordi
Cerviño, Miguel
Cristóbal-Hornillos, David
Infante, Leopoldo
González Delgado, Rosa M.
Martínez, Vicente J.
Molino, Alberto
Prada, Francisco
Quintana, José María
Junta de Andalucía
Ministerio de Ciencia e Innovación (España)
Generalitat Valenciana
Consejo Superior de Investigaciones Científicas (España)
European Commission
[Aims]: We aim to illustrate the potentiality of the Advanced Large, Homogeneous Area, Medium-Band Redshift Astronomical (ALHAMBRA) survey to investigate the high-redshift universe through the detection of quasi stellar objects (QSOs) at redshifts higher than 5. [Methods]: We searched for QSOs candidates at high redshift by fitting an extensive library of spectral energy distributions-including active and non-active galaxy templates, as well as stars-to the photometric database of the ALHAMBRA survey (composed of 20 optical medium-band plus the 3 broad-band JHKs near-infrared filters). [Results]: Our selection over ≈1 square degree of ALHAMBRA data (∼1/4 of the total area covered by the survey), combined with GTC/OSIRIS spectroscopy, has yielded identification of an optically faint QSO at very high redshift (z = 5.41). The QSO has an absolute magnitude of ∼-24 at the 1450 Å continuum, a bolometric luminosity of ≈2 × 1046 erg s -1, and an estimated black hole mass of ≈108 M ⊙. This QSO adds itself to a reduced number of known UV faint sources at these redshifts. The preliminary derived space density is compatible with the most recent determinations of the high-z QSO luminosity functions. This new detection shows how ALHAMBRA, as well as forthcoming well-designed photometric surveys, can provide a wealth of information on the origin and early evolution of this kind of object. © 2013 ESO.
Part of this work was supported by Junta de Andalucía, through grant TIC-114 and the Excellence Project P08-TIC-3531, and by the Spanish Ministry for Science and Innovation through grants AYA2006-1456, AYA2010-15169, and AYA2010-22111-C03-02, and Generalitat Valenciana project Prometeo 2008/132. M.P. acknowledges financial support from the JAE-Doc programme of the Spanish National Research Council (CSIC), co-funded by the European Social Fund.
Peer Reviewed
2015-01-30T12:00:39Z
2015-01-30T12:00:39Z
2013
2015-01-30T12:00:40Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1051/0004-6361/201321920
issn: 0004-6361
e-issn: 1432-0746
Astronomy and Astrophysics 557: A78 (2013)
http://hdl.handle.net/10261/109991
10.1051/0004-6361/201321920
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100003359
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100011011
Publisher's version
http://dx.doi.org/10.1051/0004-6361/201321920
open
EDP Sciences