Evidence of primordial clustering around the QSO SDSS J1030+0524 at z = 6.28

M. Stiavelli; S. G. Djorgovski; C. Pavlovsky; C. Scarlata; D. Stern; A. Mahabal; D. Thompson; M. Dickinson; N. Panagia; G. Meylan

doi:10.1086/429406

Evidence of primordial clustering around the QSO SDSS J1030+0524 at z = 6.28

M. Stiavelli, S. G. Djorgovski, C. Pavlovsky, C. Scarlata, D. Stern, A. Mahabal, D. Thompson, M. Dickinson, N. Panagia, G. Meylan

Minnesota Institute for Astrophysics

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87 Scopus citations

Abstract

We present tentative evidence of primordial clustering, manifested as an excess of color-selected objects in the field of the QSO SDSS J1030+0524 at redshift z = 6.28. We have selected objects red in i₇₇₅ - z ₈₅₀ on the basis of Hubble Space Telescope Advanced Camera for Surveys imaging of a field centered on the QSO. Compared to data at comparable depth obtained by the Great Observatories Origins Deep Survey, we find an excess of objects with i₇₇₅ - z₈₅₀ ≥ 1.5 in the QSO field. The significance of the detection is estimated to be ∼97% on the basis of the counts alone and increases to 99.4% if one takes into account the color distribution. If confirmed, this would represent the highest redshift example of galaxy clustering and would have implications on models for the growth of structure. Bias-driven clustering of first luminous objects forming in the highest peaks of the primordial density field is expected in most models of early structure formation. The redshift of one of the candidates has been found to be z = 5.970 by our spectroscopy with the Keck I Low Resolution Imaging Spectrometer, confirming the validity of our color selection.

Original language	English (US)
Pages (from-to)	L1-L4
Journal	Astrophysical Journal
Volume	622
Issue number	1 II
DOIs	https://doi.org/10.1086/429406
State	Published - Mar 20 2005

Bibliographical note

Funding Information:
1Based, in part, on data obtained at the W. M. Keck Observatory, which is operated as a scientific partnership between the California Institute of Technology, the University of California, and NASA, and was made possible by the generous financial support of the W. M. Keck Foundation.

Funding Information:
We thank the GOODS teams for obtaining and releasing the data on which our study is partly based. NASA/ESA Hubble Space Telescope data are obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This work is partially supported by NASA grant GO-9777. The work of D. S. was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. We thank the staff of W. M. Keck Observatory for their expert assistance.

Keywords

Early universe
Galaxies: formation
Galaxies: high-redshift

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10.1086/429406

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title = "Evidence of primordial clustering around the QSO SDSS J1030+0524 at z = 6.28",

abstract = "We present tentative evidence of primordial clustering, manifested as an excess of color-selected objects in the field of the QSO SDSS J1030+0524 at redshift z = 6.28. We have selected objects red in i775 - z 850 on the basis of Hubble Space Telescope Advanced Camera for Surveys imaging of a field centered on the QSO. Compared to data at comparable depth obtained by the Great Observatories Origins Deep Survey, we find an excess of objects with i775 - z850 ≥ 1.5 in the QSO field. The significance of the detection is estimated to be ∼97% on the basis of the counts alone and increases to 99.4% if one takes into account the color distribution. If confirmed, this would represent the highest redshift example of galaxy clustering and would have implications on models for the growth of structure. Bias-driven clustering of first luminous objects forming in the highest peaks of the primordial density field is expected in most models of early structure formation. The redshift of one of the candidates has been found to be z = 5.970 by our spectroscopy with the Keck I Low Resolution Imaging Spectrometer, confirming the validity of our color selection.",

keywords = "Early universe, Galaxies: formation, Galaxies: high-redshift",

author = "M. Stiavelli and Djorgovski, {S. G.} and C. Pavlovsky and C. Scarlata and D. Stern and A. Mahabal and D. Thompson and M. Dickinson and N. Panagia and G. Meylan",

note = "Funding Information: 1Based, in part, on data obtained at the W. M. Keck Observatory, which is operated as a scientific partnership between the California Institute of Technology, the University of California, and NASA, and was made possible by the generous financial support of the W. M. Keck Foundation. Funding Information: We thank the GOODS teams for obtaining and releasing the data on which our study is partly based. NASA/ESA Hubble Space Telescope data are obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This work is partially supported by NASA grant GO-9777. The work of D. S. was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. We thank the staff of W. M. Keck Observatory for their expert assistance.",

year = "2005",

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AU - Stiavelli, M.

AU - Djorgovski, S. G.

AU - Pavlovsky, C.

AU - Scarlata, C.

AU - Stern, D.

AU - Mahabal, A.

AU - Thompson, D.

AU - Dickinson, M.

AU - Panagia, N.

AU - Meylan, G.

N1 - Funding Information: 1Based, in part, on data obtained at the W. M. Keck Observatory, which is operated as a scientific partnership between the California Institute of Technology, the University of California, and NASA, and was made possible by the generous financial support of the W. M. Keck Foundation. Funding Information: We thank the GOODS teams for obtaining and releasing the data on which our study is partly based. NASA/ESA Hubble Space Telescope data are obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. This work is partially supported by NASA grant GO-9777. The work of D. S. was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. We thank the staff of W. M. Keck Observatory for their expert assistance.

PY - 2005/3/20

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N2 - We present tentative evidence of primordial clustering, manifested as an excess of color-selected objects in the field of the QSO SDSS J1030+0524 at redshift z = 6.28. We have selected objects red in i775 - z 850 on the basis of Hubble Space Telescope Advanced Camera for Surveys imaging of a field centered on the QSO. Compared to data at comparable depth obtained by the Great Observatories Origins Deep Survey, we find an excess of objects with i775 - z850 ≥ 1.5 in the QSO field. The significance of the detection is estimated to be ∼97% on the basis of the counts alone and increases to 99.4% if one takes into account the color distribution. If confirmed, this would represent the highest redshift example of galaxy clustering and would have implications on models for the growth of structure. Bias-driven clustering of first luminous objects forming in the highest peaks of the primordial density field is expected in most models of early structure formation. The redshift of one of the candidates has been found to be z = 5.970 by our spectroscopy with the Keck I Low Resolution Imaging Spectrometer, confirming the validity of our color selection.

AB - We present tentative evidence of primordial clustering, manifested as an excess of color-selected objects in the field of the QSO SDSS J1030+0524 at redshift z = 6.28. We have selected objects red in i775 - z 850 on the basis of Hubble Space Telescope Advanced Camera for Surveys imaging of a field centered on the QSO. Compared to data at comparable depth obtained by the Great Observatories Origins Deep Survey, we find an excess of objects with i775 - z850 ≥ 1.5 in the QSO field. The significance of the detection is estimated to be ∼97% on the basis of the counts alone and increases to 99.4% if one takes into account the color distribution. If confirmed, this would represent the highest redshift example of galaxy clustering and would have implications on models for the growth of structure. Bias-driven clustering of first luminous objects forming in the highest peaks of the primordial density field is expected in most models of early structure formation. The redshift of one of the candidates has been found to be z = 5.970 by our spectroscopy with the Keck I Low Resolution Imaging Spectrometer, confirming the validity of our color selection.

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KW - Galaxies: high-redshift

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JF - Astrophysical Journal

IS - 1 II

ER -

Evidence of primordial clustering around the QSO SDSS J1030+0524 at z = 6.28

Abstract

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