Volume 440, Number 2, September III 2005
|Page(s)||L51 - L54|
|Published online||01 September 2005|
Letter to the Editor
First detection of [CII]158 μm at high redshift: vigorous star formation in the early universe
INAF – Osservatorio Astrofisico di Arcetri, L.go E. Fermi 5, 50125 Firenze, Italy e-mail: email@example.com
2 IRAM, 300 rue de la Piscine, 38406 St.-Marin-d'Hères, France
3 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
4 Radioastronomisches Institut, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
5 National Radio Astronomy Observatory, PO Box O, Socorro, NM 87801, USA
6 Department of Physics, San Jose State University, 1 Washington Square, San Jose, CA 95192, USA
7 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
8 Institut d'Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
9 Instituto de Radioastronomia Milimetrica, Avenida Divina Pastora 7, 18012 Granada, Spain
10 Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
Accepted: 29 July 2005
We report the detection of the fine-structure line of at 157.74 in SDSS J114816.64+525150.3 (hereafter J1148+5251), the most distant known quasar, at , using the IRAM 30-m telescope. This is the first detection of the [Cii] line at high redshift, and also the first detection in a Hyperluminous Infrared Galaxy (). The [Cii] line is detected at a significance level of 8σ and has a luminosity of . The ratio is , about an order of magnitude smaller than observed in local normal galaxies and similar to the ratio observed in local Ultraluminous Infrared Galaxies. The [Cii] line luminosity indicates that the host galaxy of this quasar is undergoing an intense burst of star formation with an estimated rate of ≈. The detection of in SDSS J1148+5251 suggests a significant enrichment of metals at (age of the universe ~870 Myr), although the data are consistent with a reduced carbon to oxygen ratio as expected from chemical evolutionary models of the early phases of galaxy formation.
Key words: galaxies: high redshift / galaxies: ISM / quasars: individual: J114816.64+525150.3 / infrared: galaxies / submillimeter / ISM: abundances
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.