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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Herschel-atlas: A binary HyLIRG pinpointing a cluster of starbursting protoellipticals
Astrophysical Journal, Volume 772, No. 2, Article 137, Year 2013
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Description
Panchromatic observations of the best candidate hyperluminous infrared galaxies from the widest Herschel extragalactic imaging survey have led to the discovery of at least four intrinsically luminous z = 2.41 galaxies across an ≈100 kpc region - a cluster of starbursting protoellipticals. Via subarcsecond interferometric imaging we have measured accurate gas and star formation surface densities. The two brightest galaxies span ∼3 kpc FWHM in submillimeter/radio continuum and CO J = 4-3, and double that in CO J = 1-0. The broad CO line is due partly to the multitude of constituent galaxies and partly to large rotational velocities in two counter-rotating gas disks - a scenario predicted to lead to the most intense starbursts, which will therefore come in pairs. The disks have M dyn of several × 1011 M o, and gas fractions of ∼40%. Velocity dispersions are modest so the disks are unstable, potentially on scales commensurate with their radii: these galaxies are undergoing extreme bursts of star formation, not confined to their nuclei, at close to the Eddington limit. Their specific star formation rates place them ≳ 5 × above the main sequence, which supposedly comprises large gas disks like these. Their high star formation efficiencies are difficult to reconcile with a simple volumetric star formation law. N-body and dark matter simulations suggest that this system is the progenitor of a B(inary)-type ≈1014.6- o cluster. © 2013. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Ivison, Robert J.
United Kingdom, Edinburgh
Royal Observatory
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Swinbank, A. Mark
United Kingdom, Durham
Durham University
Smail, Ian R.
United Kingdom, Durham
Durham University
Harris, Andrew I.
United States, College Park
University of Maryland, College Park
Bussmann, Robert Shane
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Cooray, Asantha Roshan
United States, Irvine
University of California, Irvine
Cox, Pierre
France, Saint Martin D'heres
Iram Institut de Radioastronomie Millimétrique
Fu, Hai
United States, Irvine
University of California, Irvine
Kovács, Attila
United States, Minneapolis
University of Minnesota Twin Cities
Krips, Melanie
France, Saint Martin D'heres
Iram Institut de Radioastronomie Millimétrique
Narayanan, Desika T.
United States, Tucson
The University of Arizona
Negrello, Mattia
Italy, Padua
Osservatorio Astronomico Di Padova
Neri, Roberto
France, Saint Martin D'heres
Iram Institut de Radioastronomie Millimétrique
Peñarrubia, Jorge
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Richard, Johan
France, Villeurbanne
Université Claude Bernard Lyon 1
Riechers, Dominick A.
United States, Ithaca
Cornell University
Rowlands, Kate E.
United Kingdom, Nottingham
University of Nottingham
Staguhn, Johannes G.
United States, Baltimore
Johns Hopkins University Krieger School of Arts and Sciences
Targett, Thomas A.
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Amber, Simon
United Kingdom, Milton Keynes
The Open University
Bourne, Nathan
United Kingdom, Nottingham
University of Nottingham
Bertoldi, Frank
Germany, Bonn
Universität Bonn
Bremer, Malcolm N.
United Kingdom, Bristol
University of Bristol
Calanog, Jae A.
United States, Irvine
University of California, Irvine
Clements, David L.
United Kingdom, London
Imperial College London
Dannerbauer, Helmut
Austria, Vienna
Universität Wien
Dariush, Aliakbar A.
United Kingdom, Cambridge
Institute of Astronomy
de Zotti, Gianfranco
Italy, Padua
Osservatorio Astronomico Di Padova
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Dunne, Loretta
New Zealand, Christchurch
University of Canterbury
Eales, Stephen A.
United Kingdom, Cardiff
Cardiff University
Farrah, Duncan G.
United States, Blacksburg
Virginia Polytechnic Institute and State University
Fleuren, Simone
United Kingdom, London
Queen Mary University of London
Franceschini, Alberto
Italy, Padua
Università Degli Studi Di Padova
Geach, James E.
United Kingdom, Hatfield
University of Hertfordshire
George, R. D.
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Helly, J. C.
United Kingdom, Durham
Durham University
Hopwood, Rosalind H.B.
United Kingdom, Milton Keynes
The Open University
United Kingdom, London
Imperial College London
Ibar, E.
United Kingdom, Edinburgh
Royal Observatory
Chile, Santiago
Pontificia Universidad Católica de Chile
Jarvis, Matthew J.
United Kingdom, Oxford
University of Oxford
South Africa, Bellville
University of the Western Cape
Kneib, Jean Paul
Switzerland, Lausanne
École Polytechnique Fédérale de Lausanne
Maddox, Steve J.
New Zealand, Christchurch
University of Canterbury
Omont, Alain A.
France, Paris
Sorbonne Université
Scott, Douglas J.
Canada, Vancouver
The University of British Columbia
Serjeant, Stephen B.G.
United Kingdom, Milton Keynes
The Open University
Smith, Matthew W.L.
United Kingdom, Cardiff
Cardiff University
Thompson, Mark A.
United Kingdom, Hatfield
University of Hertfordshire
Valiante, Elisabetta
United Kingdom, Cardiff
Cardiff University
Valtchanov, Ivan
Spain, Madrid
European Space Astronomy Centre
Vieira, Joaquin D.
United States, Pasadena
California Institute of Technology
van der Werf, Paul P.
Netherlands, Leiden
Sterrewacht Leiden
Statistics
Citations: 130
Authors: 50
Affiliations: 37
Identifiers
Doi:
10.1088/0004-637X/772/2/137
ISSN:
0004637X
e-ISSN:
15384357
Study Design
Cross Sectional Study
Study Approach
Quantitative