2017A&A...606A..23B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST20:53:18

2017A&A...606A..23B - Astronomy and Astrophysics, volume 606A, 23-23 (2017/10-1)

Primordial environment of supermassive black holes. II. Deep Y- and J-band images around the z∼ 6.3 quasar SDSS J1030+0524.

BALMAVERDE B., GILLI R., MIGNOLI M., BOLZONELLA M., BRUSA M., CAPPELLUTI N., COMASTRI A., SANI E., VANZELLA E., VIGNALI C., VITO F. and ZAMORANI G.

Abstract (from CDS):

Many cosmological studies predict that early supermassive black holes (SMBHs) can only form in the most massive dark matter halos embedded within large-scale structures marked by galaxy overdensities that may extend up to ∼10 physical Mpc. This scenario, however, has not been confirmed observationally, as the search for galaxy overdensities around high-z quasars has returned conflicting results. The field around the z=6.31 quasar SDSSJ1030+0524 (J1030) is unique for multi-band coverage and represents an excellent data legacy for studying the environment around a primordial SMBH. In this paper we present wide-area (∼25'x25') Y- and J-band imaging of the J1030 field obtained with the near infrared camera WIRCam at the Canada-France-Hawaii Telescope (CFHT). We built source catalogs in the Y- and J-band, and matched those with our photometric catalog in the r, z, and i bands presented in our previous paper and based on sources with zAB<25.2 detected using z-band images from the the Large Binocular Cameras (LBC) at the Large Binocular Telescope (LBT) over the same field of view. We used these new infrared data together with H and K photometric measurements from the MUlti-wavelength Survey by Yale-Chile (MUSYC) and with the Spitzer Infrared Array Camera (IRAC) data to refine our selection of Lyman break galaxies (LBGs), extending our selection criteria to galaxies in the range 25.2<zAB<25.7. We selected 21 robust high redshift candidates in the J1030 field with photometric redshift z∼6 and colors i-z≥1.3. We found a significant asymmetry in the distribution of the high redshift galaxies in J1030, supporting the existence of a coherent large-scale structure around the quasar. We estimated an overdensity of z∼6 galaxies in the field of δ=2.4, which is significant at >4σ. The overdensity value and its significance are higher than those found in our previous paper and we interpret this as evidence of an improved LBG selection.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: high-redshift - galaxies: photometry - galaxies: photometry

Nomenclature: Tables 2: [BGM2017] J1030 NNNNN N=18 among (Nos 2335 to 30511) added.

Status at CDS:   All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SDSS J103027.09+052455.0 QSO 10 30 27.092 +05 24 55.02   26.15 25.44     ~ 221 0
2 SDSS J104845.05+463718.3 QSO 10 48 45.058 +46 37 18.38   25.87 24.76     ~ 116 0
3 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 391 0
4 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 303 1
5 SDSS J141111.27+121737.3 QSO 14 11 11.277 +12 17 37.31   24.79 23.82     ~ 61 0

    Equat.    Gal    SGal    Ecl

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2020.07.11-20:53:18

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