Overdensity of Lyman-Break Galaxy Candidates Around Hot Dust-Obscured Galaxies

Abstract

Hot dust-obscured galaxies (Hot DOGs), are a family of hyper-luminous, heavily obscured quasars. A number of studies have shown that these objects reside in significantly overdense regions of the Universe based on the identification of companions at optical through far-IR wavelengths. Here we present further characterization of their environments by studying the surface density of Lyman break galaxy (LBG) candidates in the vicinity of three Hot DOGs. For two of them, WISE J041010.60-091305.2 at z=3.631 and WISE J083153.25+014010.8 at z=3.912, we identify the candidate LBG companions using deep observations obtained with Baade/IMACS. For the third, WISE J224607.56-052634.9 at z=4.601, we re-analyse previously published data obtained with Gemini-S/GMOS-S. We optimise the LBG photometric selection criteria at the redshift of each target using the COSMOS2020 catalog. When comparing the density of LBG candidates found in the vicinity of these Hot DOGs with that in the COSMOS2020 catalog, we find overdensities of $\delta =1.83\pm 0.08$ (${\delta }^{\prime }=7.49\pm 0.68$), $\delta =4.67\pm 0.21$ (${\delta }^{\prime }=29.17\pm 2.21$), and $\delta =2.36\pm 0.25$ (${\delta }^{\prime }=11.60\pm 1.96$) around W0410-0913, W0831+0140, and W2246-0526, respectively, without (with) contamination correction. Additionally, we find that the overdensities are centrally concentrated around each Hot DOG. Our analysis also reveals that the overdensity of the fields surrounding W0410-0913 and W0831+0140 declines steeply beyond physical scales of $\sim$2 Mpc. If these overdensities evolve to clusters by z=0, these results suggest that the Hot DOG may correspond to the early formation stages of the brightest cluster galaxy. We were unable to determine if this is also the case for W2246-0526 due to the smaller field of view of the GMOS-S observations. Our results imply that Hot DOGs may be excellent tracers of protoclusters.

Accepted for publication in A&A, the manuscript consists of 14 pages, 16 figures, and 4 tables

References in corpus (31)

• Gaia Data Release 3: Summary of the content and survey properties
• The Cosmic Evolution Survey (COSMOS) -- Overview
• EAZY: A Fast, Public Photometric Redshift Code
• COSMOS2020: A panchromatic view of the Universe to $z\sim 10$ from two complementary catalogs
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• A Luminous Quasar at Redshift 7.642
• Formation of z ~ 6 quasars from hierarchical galaxy mergers
• The First Hyper-Luminous Infrared Galaxy Discovered by WISE
• Half of the Most Luminous Quasars May Be Obscured: Investigating the Nature of WISE-Selected Hot, Dust-Obscured Galaxies
• The Most Luminous Galaxies Discovered by WISE
• Submillimeter Follow-up of WISE-Selected Hyperluminous Galaxies
• NuSTAR and XMM-Newton Observations of Luminous, Heavily Obscured, WISE-Selected Quasars at z ~ 2
• LCDM predictions for galaxy protoclusters I: the relation between galaxies, protoclusters and quasars at z~6
• A Morphological Classification Model to Identify Unresolved PanSTARRS1 Sources: Application in the ZTF Real-Time Pipeline
• The Habitat Segregation between Lyman Break Galaxies and Lyman alpha Emitters around a QSO at z~5
• The primordial environment of super massive black holes: large scale galaxy overdensities around $z\sim 6$ QSOs with LBT
• Submillimetre observations of WISE-selected high-redshift, luminous, dusty galaxies
• No overdensity of Lyman Alpha Emitting Galaxies around a quasar at z~5.7
• The web of the Giant: spectroscopic confirmation of a Large Scale Structure around the z=6.31 quasar SDSS J1030+0524
• The primordial environment of supermassive black holes (II): deep Y and J band images around the z=6.3 quasar SDSS J1030+0524
• Fast Outflows in Hot Dust-Obscured Galaxies with Keck/NIRES
• Spectral Classification and Ionized Gas Outflows in $z\sim 2$ WISE-Selected Hot Dust-Obscured Galaxies
• Large-scale structure of Lyman break galaxies around a radio galaxy protocluster at z~4
• Overdensities of SMGs around WISE-selected, ultra-luminous, high-redshift AGN
• Detection of companion galaxies around hot dust-obscured hyper-luminous galaxy W0410-0913
• Imaging Polarization of the Blue-Excess Hot Dust-Obscured Galaxy WISE J011601.41-050504.0
• The SCUBA-2 850 $\mu m$ follow-up of WISE-selected, luminous dust-obscured quasars
• A Mixture of LBG Overdensities in the Fields of Three $6<z<7$ Quasars: Implications for the Robustness of Photometric Selection
• An Overdensity of Lyman Break Galaxies Around the Hot Dust-Obscured Galaxy WISE J224607.56$-$052634.9
• An overdensity of red galaxies around the hyperluminous dust-obscured quasar W1835$+$4355 at $z=2.3$
• A lack of LAEs within 5Mpc of a luminous quasar in an overdensity at z=6.9: potential evidence of quasar negative feedback at protocluster scales

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