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The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41 (Research Note)

Opened Access The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41 (Research Note)


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Autor: Cabrera Cano, J.
Matute, I.
Masegosa, J.
Márquez, I.
Fernández Soto, A.
Departamento: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Fecha: 2013
Publicado en: Astronomy and Astrophysics, 557, 1-6.
Tipo de documento: Artículo
Resumen: 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 ...
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Cita: Cabrera Cano, J., Matute, I., Masegosa, J., Márquez, I. y Fernández Soto, A. (2013). The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41 (Research Note). Astronomy and Astrophysics, 557, 1-6.
Tamaño: 1.484Mb
Formato: PDF


DOI: 10.1051/0004-6361/201321920

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