The 6dF Galaxy Survey: final redshift release (DR3) and southern large-scale structures |
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| Authors: | D. Heath Jones,Mike A. Read,Will Saunders,Matthew Colless,Tom Jarrett,Quentin A. Parker,Anthony P. Fairall &dagger ,Thomas Mauch,Elaine M. Sadler,Fred G. Watson,Donna Burton,Lachlan A. Campbell,Paul Cass,Scott M. Croom,John Dawe &dagger ,Kristin Fiegert,Leela Frankcombe,Malcolm Hartley,John Huchra,Dionne James,Emma Kirby,Ofer Lahav,John Lucey,Gary A. Mamon,Lesa Moore,Bruce A. Peterson,Sayuri Prior,Dominique Proust,Ken Russell,Vicky Safouris,Ken-ichi Wakamatsu,Eduard Westra, Mary Williams |
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| Affiliation: | Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia;Institute for Astronomy, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ;Infrared Processing and Analysis Center, California Institute of Technology, Mail Code 100-22, Pasadena, CA 91125, USA;Department of Physics, Macquarie University, Sydney 2109, Australia;Department of Astronomy, University of Cape Town, Private Bag, Rondebosch 7700, South Africa;Astrophysics, Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH;School of Physics, University of Sydney, NSW 2006, Australia;Research School of Astronomy &Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia;Harvard-Smithsonian Center for Astrophysics, 60 Garden St MS20, Cambridge, MA 02138-1516, USA;Department of Physics and Astronomy, University College London, Gower St, London WC1E 6BT;Department of Physics, University of Durham, South Road, Durham DH1 3LE;Institut d'Astrophysique de Paris (CNRS UMR 7095), 98 bis Bd Arago, F-75014 Paris, France;GEPI (CNRS UMR 8111), Observatoire de Paris, F-92195 Meudon, France;Faculty of Engineering, Gifu University, Gifu 501-1193, Japan |
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| Abstract: | We report the final redshift release of the 6dF Galaxy Survey (6dFGS), a combined redshift and peculiar velocity survey over the southern sky (| b | > 10°) . Its 136 304 spectra have yielded 110 256 new extragalactic redshifts and a new catalogue of 125 071 galaxies making near-complete samples with ( K , H , J , r F, b J) ≤ (12.65, 12.95, 13.75, 15.60, 16.75) . The median redshift of the survey is 0.053. Survey data, including images, spectra, photometry and redshifts, are available through an online data base. We describe changes to the information in the data base since earlier interim data releases. Future releases will include velocity dispersions, distances and peculiar velocities for the brightest early-type galaxies, comprising about 10 per cent of the sample. Here we provide redshift maps of the southern local Universe with z ≤ 0.1 , showing nearby large-scale structures in hitherto unseen detail. A number of regions known previously to have a paucity of galaxies are confirmed as significantly underdense regions. The URL of the 6dFGS data base is http://www-wfau.roe.ac.uk/6dFGS . |
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| Keywords: | surveys galaxies: distances and redshifts cosmology: observations large-scale structure of Universe |
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