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The XXL Survey IX. ...
The XXL Survey IX. Optical overdensity and radio continuum analysis of a supercluster at z=0.43
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- Baran, N. (författare)
- Sveučilište u Zagrebu,University of Zagreb
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- Smolcic, V. (författare)
- Sveučilište u Zagrebu,University of Zagreb
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- Milakovic, D. (författare)
- Sveučilište u Zagrebu,University of Zagreb
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- Novak, M. (författare)
- Sveučilište u Zagrebu,University of Zagreb
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- Delhaize, J. (författare)
- Sveučilište u Zagrebu,University of Zagreb
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- Gastaldello, F. (författare)
- Istituto nazionale di astrofisica (INAF)
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Ramos-Ceja, M. E. (författare)
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Pacaud, F. (författare)
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- Bourke, S. (författare)
- California Institute of Technology (Caltech)
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- Carilli, C. L. (författare)
- National Radio Astronomy Observatory Socorro
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- Ettori, S. (författare)
- Osservatorio Astronomico Di Bologna
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- Hallinan, G. (författare)
- California Institute of Technology (Caltech)
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- Horellou, Cathy, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Koulouridis, E. (författare)
- Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Chiappetti, L. (författare)
- Istituto nazionale di astrofisica (INAF)
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- Miettinen, O. (författare)
- Sveučilište u Zagrebu,University of Zagreb
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- Melnyk, O. (författare)
- Taras Shevchenko National University of Kyiv,Sveučilište u Zagrebu,University of Zagreb
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- Mooley, K. (författare)
- California Institute of Technology (Caltech)
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- Pierre, M. (författare)
- Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Pompei, E. (författare)
- European Southern Observatory Santiago
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- Schinnerer, E. (författare)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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(creator_code:org_t)
- 2016-06-15
- 2016
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 592
- Relaterad länk:
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http://publications.... (primary) (free)
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https://www.aanda.or...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We present observations with the Karl G. Jansky Very Large Array (VLA) at 3 GHz (10 cm) toward a sub-field of the XXL-North 25 deg(2) field targeting the first supercluster discovered in the XXL Survey. The structure has been found at a spectroscopic redshift of 0.43 and extending over 0.degrees 35x0.degrees 1 on the sky. The aim of this paper is twofold. First, we present the 3 GHz VLA radio continuum observations, the final radio mosaic and radio source catalogue, and, second, we perform a detailed analysis of the supercluster in the optical and radio regimes using photometric redshifts from the CFHTLS survey and our new VLA-XXL data. Our final 3 GHz radio mosaic has a resolution of 3 ''.2 x 1 ''.9, and encompasses an area of 41'x41' with rms noise level lower than similar to 20 mu Jy beam(-1). The noise in the central 15'x15' region is approximate to 11 mu Jy beam(-1). From the mosaic we extract a catalogue of 155 radio sources with signal-to-noise ratio (S/N) >= 6, eight of which are large, multicomponent sources, and 123 (79%) of which can be associated with optical sources in the CFHTLS W1 catalogue. Applying Voronoi tessellation analysis (VTA) in the area around the X-ray identified supercluster using photometric redshifts from the CFHTLS survey we identify a total of seventeen overdensities at z(phot) = 0.35-0.50, 7 of which are associated with clusters detected in the XMM-Newton XXL data. We find a mean photometric redshift of 0.43 for our overdensities, consistent with the spectroscopic redshifts of the brightest cluster galaxies of seven X-ray detected clusters. The full VTA-identified structure extends over similar to 0.degrees 6x0.degrees 2on the sky, which corresponds to a physical size of similar to 12x4 Mpc(2) at z = 0.43. No large radio galaxies are present within the overdensities, and we associate eight (S/N > 7) radio sources with potential group/cluster member galaxies. The spatial distribution of the red and blue VTA-identified potential group member galaxies, selected by their observed g -r colours, suggests that the clusters are not virialised yet, but are dynamically young, as expected for hierarchical structure growth in a Lambda CDM universe. Further spectroscopic data are required to analyse the dynamical state of the groups.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies: groups: general
- galaxies: clusters: general
- radio continuum: galaxies
- catalogs
Publikations- och innehållstyp
- for (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Baran, N.
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Smolcic, V.
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Milakovic, D.
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Novak, M.
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Delhaize, J.
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Gastaldello, F.
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visa fler...
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Ramos-Ceja, M. E ...
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Pacaud, F.
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Bourke, S.
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Carilli, C. L.
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Ettori, S.
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Hallinan, G.
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Horellou, Cathy, ...
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Koulouridis, E.
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Chiappetti, L.
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Miettinen, O.
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Melnyk, O.
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Mooley, K.
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Pierre, M.
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Pompei, E.
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Schinnerer, E.
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