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An overdensity of galaxies near the most distant radio-loud quasar
期刊文章

An overdensity of galaxies near the most distant radio-loud quasar

W. Zheng, R.A. Overzier, R.J. Bouwens, R.L. White, H.C. Ford, N. Beníez, J.P. Blakeslee, L.D. Bradley, M.J. Jee, A.R. Martel, …
Astrophysical Journal, 卷.640(2 I), 頁碼.574-578
04/2006
DOI: https://doi.org/10.1086/500167

摘要

Galaxies: high-redshift Large-scale structure of universe Space and Planetary Science Nuclear and High Energy Physics
A 5 arcmin <sup>2</sup> region around the luminous radio-loud quasar SDSS J0836+0054 (z = 5.8) hosts a wealth of associated galaxies, characterized by very red (1.3 < i <sub>775</sub> - z <sub>850</sub> < 2.0) color. The surface density of these z ∼ 5.8 candidates is approximately 6 times higher than the number expected from deep ACS fields. This is one of the highest galaxy overdensities at high redshifts, which may develop into a group or cluster. We also find evidence for a substructure associated with one of the candidates. It has two very faint companion objects within 2″, which are likely to merge. The finding supports the results of a recent simulation, which finds that luminous quasars at high redshifts lie on the most prominent dark matter filaments and are surrounded by many fainter galaxies. The quasar activity from these regions may signal the buildup of a massive system. © 2006 The American Astronomical Society. All rights reserved.

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