Abstract
The most massive galaxies and the richest clusters are believed to have emerged from regions with the largest enhancements of mass density1,2,3,4 relative to the surrounding space. Distant radio galaxies may pinpoint the locations of the ancestors of rich clusters, because they are massive systems associated with ‘overdensities’ of galaxies that are bright in the Lyman-α line of hydrogen5,6,7. A powerful technique for detecting high-redshift galaxies is to search for the characteristic ‘Lyman break’ feature in the galaxy colour, at wavelengths just shortwards of Lyα, which is due to absorption of radiation from the galaxy by the intervening intergalactic medium. Here we report multicolour imaging of the most distant candidate7,8,9 protocluster, TN J1338–1942 at a redshift z ≈ 4.1. We find a large number of objects with the characteristic colours of galaxies at that redshift, and we show that this excess is concentrated around the targeted dominant radio galaxy. Our data therefore indicate that TN J1338–1942 is indeed the most distant cluster progenitor of a rich local cluster, and that galaxy clusters began forming when the Universe was only ten per cent of its present age.
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References
Kaiser, N. On the spatial correlation function of Abell clusters. Astrophys. J. 284, L9–L12 (1984)
White, S. D. M. & Rees, M. J. Core condensation in heavy halos—A two-stage theory for galaxy formation and clustering. Mon. Not. R. Astron. Soc. 183, 341–358 (1978)
Baugh, C. M., Cole, S., Frenk, C. S. & Lacey, C. G. The epoch of galaxy formation. Astrophys. J. 498, 504–521 (1998)
Bahcall, N. A. & Fan, X. The most massive distant clusters: Determining Ω and σ8 . Astrophys. J. 504, 1–6 (1998)
Miley, G. in Extrasolar Planets to Cosmology: The VLT Opening Symposium (eds Bergeron, J. & Renzini, A.) 32–42 (Springer, Berlin, 2000)
Pentericci, L. et al. A search for clusters at high redshift. II. A proto cluster around a radio galaxy at z = 2.16. Astron. Astrophys. 361, L25–L28 (2000)
Venemans, B. P. et al. The most distant structure of galaxies known: A protocluster at z = 4.1. Astrophys. J. 569, L11–L14 (2002)
De Breuck, C. et al. VLT spectroscopy of the z = 4.11 radio galaxy TN J1338–1942. Astron. Astrophys. 352, L51–L56 (1999)
De Breuck, C., van Breugel, W., Röttgering, H. J. A. & Miley, G. A sample of 669 ultra steep spectrum radio sources to find high redshift radio galaxies. Astron. Astrophys. Suppl. 143, 303–333 (2000)
Rosati, P. et al. An X-ray-selected galaxy cluster at z = 1.26. Astron. J. 118, 76–85 (1999)
Steidel, C. C. et al. A large structure of galaxies at redshift z ∼ 3 and its cosmological implications. Astrophys. J. 492, 428–438 (1998)
Shimasaku, K. et al. Subaru deep survey IV: Discovery of a large-scale structure at redshift ∼ = 5. Astrophys. J. 586, L111–L114 (2003)
De Breuck, C. et al. Optical and near-infrared imaging of ultra-steep-spectrum radio sources: The K-z diagram of radio-selected and optically selected galaxies. Astron. J. 123, 637–677 (2002)
Dey, A., van Breugel, W., Vacca, W. D. & Antonucci, R. Triggered star formation in a massive galaxy at z = 3.8: 4C 41.17. Astrophys. J. 490, 698–709 (1997)
Pentericci, L. et al. HST images and properties of the most distant radio galaxies. Astrophys. J. 504, 139–146 (1999)
van Ojik, R. Gas in Distant Radio Galaxies: Probing the Early Universe Thesis, Leiden Univ. (1995)
Steidel, C. C. et al. Lyα imaging of a proto-cluster region at 〈z〉 = 3.09. Astrophys. J. 532, 170–182 (2000)
Shapley, A. E., Steidel, C. C., Pettini, M. & Adelberger, K. Rest-frame ultraviolet spectra of z ∼ 3 Lyman break galaxies. Astrophys. J. 588, 65–89 (2003)
Steidel, C. C., Giavalisco, M., Pettini, M., Dickinson, M. & Adelberger, K. Spectroscopic confirmation of a population of normal star-forming galaxies at redshifts z > 3. Astrophys. J. 462, L1–L7 (1999)
Steidel, C. C., Adelberger, K., Giavalisco, M., Dickinson, M. & Pettini, M. Lyman-break galaxies at z > 4 and the evolution of the ultraviolet luminosity density at high redshift. Astrophys. J. 519, 1–17 (1999)
Ford, H. C. et al. Advanced camera for the Hubble Space Telescope. Proc. SPIE 3356, 234–248 (1998)
Madau, P. Radiative transfer in a clumpy universe: The colors of high-redshift galaxies. Astrophys. J. 441, 18–27 (1995)
Bouwens, R. J., Broadhurst, T. & Illingworth, G. Cloning dropouts: Implications for galaxy evolution at high redshift. Astrophys. J. 593, 640–660 (2003)
Giavalisco, M. et al. The Great Observatories Origins Deep Survey. Astrophys. J. Lett. (special issue) (in the press)
Somerville, R. S. et al. Cosmic variance in the Great Observatories Origins Deep Survey. Astrophys. J. Lett. (special issue) (in the press); preprint at 〈http://xxx.lanl.gov/astro-ph/0309071〉 (2003)
Blakeslee, J. P., Anderson, K. R., Meurer, G. R., Benítez, N. & Magee, D. An automatic image reduction pipeline for the Advanced Camera for Surveys. ASP Conf. Ser. 295, 257–260 (2003)
Bertin, E. & Arnouts, S. SExtractor: Software for source extraction. Astron. Astrophys. 117, 393–404 (1996)
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Miley, G., Overzier, R., Tsvetanov, Z. et al. A large population of ‘Lyman-break’ galaxies in a protocluster at redshift z ≈ 4.1. Nature 427, 47–50 (2004). https://doi.org/10.1038/nature02125
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DOI: https://doi.org/10.1038/nature02125
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