prikaz prve stranice dokumenta The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43
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Scientific paper - Original scientific paper
The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43
Astronomy and Astrophysics, 592 (2016); A8. https://doi.org/10.1051/0004-6361/201526952
Baran, N.; Smolčić, Vernesa; Milaković, D.; Novak, M.; Delhaize, J.; Gastaldello, F.; Ramos-Ceja, M. E.; Pacaud, F.; Bourke, S.; Carilli, C. L.; Ettori, S.; Hallinan, G.; Horellou, C.; Koulouridis, E.; Chiappetti, L.; Miettinen, O.; Melnyk, O.; Mooley, K.; Pierre, M.; Pompei, E.; Schinnerer, E. More authors...

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Baran, N., Smolčić, V., Milaković, D., Novak, M., Delhaize, J., Gastaldello, F. ... Schinnerer, E. (2016). The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43. Astronomy and Astrophysics, 592.. doi: 10.1051/0004-6361/201526952

Baran, N., et al. "The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43." Astronomy and Astrophysics, vol. 592, 2016. https://doi.org/10.1051/0004-6361/201526952

Baran, N., Vernesa Smolčić, D. Milaković, M. Novak, J. Delhaize, F. Gastaldello, M. E. Ramos Ceja, et al. "The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43." Astronomy and Astrophysics 592 (2016). https://doi.org/10.1051/0004-6361/201526952

Baran, N., et al. (2016) 'The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43', Astronomy and Astrophysics, 592. doi: 10.1051/0004-6361/201526952

Baran N, Smolčić V, Milaković D, Novak M, Delhaize J, Gastaldello F, and sur.. The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43. Astronomy and Astrophysics [Internet]. 2016 [cited 2024 April 23];592. doi: 10.1051/0004-6361/201526952

N. Baran, et al., "The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43", Astronomy and Astrophysics, vol. 592, 2016. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:479712. [Accessed: 23 April 2024]

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Metadata
Title (english)The XXL Survey. IX. Optical overdensity and radio continuum analysis of a supercluster at z = 0.43
AuthorN. Baran
AuthorVernesa Smolčić
MBZ: 336180
AuthorD. Milaković
AuthorM. Novak
AuthorJ. Delhaize
AuthorF. Gastaldello
AuthorM. E. Ramos-Ceja
AuthorF. Pacaud
AuthorS. Bourke
AuthorC. L. Carilli
AuthorS. Ettori
AuthorG. Hallinan
AuthorC. Horellou
AuthorE. Koulouridis
AuthorL. Chiappetti
AuthorO. Miettinen
AuthorO. Melnyk
AuthorK. Mooley
AuthorM. Pierre
AuthorE. Pompei
AuthorE. Schinnerer
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Astronomy and Astrophysics
Abstract (english)
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 deg2 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.̊35 × 0.̊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 × 1.̋9, and encompasses an area of 41' × 41' with rms noise level lower than ~ 20 μJy beam-1. The noise in the central 15' × 15' region is ≈ 11 μJy 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 zphot = 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 ~ 0.̊6 × 0.̊2 on the sky, which corresponds to a physical size of ~ 12 × 4 Mpc2 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 ΛCDM universe. Further spectroscopic data are required to analyse the dynamical state of the groups.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleAstronomy and Astrophysics
Numberingvol. 592, A8
p-ISSN0004-6361
e-ISSN1432-0746
DOIhttps://doi.org/10.1051/0004-6361/201526952
URN:NBNurn:nbn:hr:217:479712
Publication2016
Document URLhttps://www.aanda.org/articles/aa/abs/2016/08/aa26952-15/aa26952-15.html
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2016 ESO. Received: 13 July 2015. Accepted: 22 April 2016.
Created on2020-02-23 16:01:45