Low-mass stars found in CFHTLS : J/ApJ/633/630

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Authors : Willott C.J. orcid , Delfosse X., Forveille T. (hide) , Delfosse X., Forveille T. et..al

VizieR DOI : 10.26093/cds/vizier.16330630
Bibcode : 2005ApJ...633..630W (ADS) (Simbad) (Objects)
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CDS Keywords : Stars, dwarfs; QSOs; Photometry, infrared
UAT : Dwarf stars, Quasars, Infrared photometry

Observation (OC)

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Inserted into VizieR : 06-Nov-2006
Last modification : 23-Dec-2006

First results from the Canada-France high-z quasar survey constraints on the z=6 quasar luminosity function and the quasar contribution to reionization. (2005)

Keywords : cosmology observations - galaxies: active - quasars: general

Abstract:We present preliminary results of a new quasar survey being undertaken with multicolor optical imaging from the Canada-France-Hawaii Telescope. The current data consist of 3.83deg^2^ of imaging in the i' and z' filters to a 10{sigma} limit of z'<23.35. Near-infrared photometry of 24 candidate 5.7<z<6.4 quasars confirms them all to be low-mass stars, including two T dwarfs and four or five L dwarfs. Photometric estimates of the spectral type of the two T dwarfs are T3 and T6. ...(more)
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American Astronomical Society policies
In this paper we use optical imaging from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) to search for high-redshift quasars. The data used come from the first official release: T0001. This release includes data in the four Deep Survey fields obtained during the period 2003 June-2004 July. Observations at J band were performed using the CFHT-IR camera at the CFHT. CFHT-IR is a HgCdTe 1024^2^ array with pixel size 0.211". Observations were carried out in photometric conditions on UT 2003 November 9-10, 2004 May 4, and 2004 November 23-24.

  • J/AJ/121/31 : High-redshift quasars in SDSS (Fan+, 2001)

                


                

                    

                


                

                    

                


                

                    
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