LBT-MODS spectroscopy of high-redshift candidates in the Chandra J1030 field. A newly discovered z$\sim$2.8 large scale structure

Abstract

We present the results of a spectroscopic campaign with the Multi-Object Double Spectrograph (MODS) instrument mounted on the Large Binocular Telescope (LBT), aimed at obtaining a spectroscopic redshift for seven Chandra J1030 sources with a photometric redshift >=2.7 and optical magnitude r_AB=[24.5-26.5]. We obtained a spectroscopic redshift for five out of seven targets: all of them have z_spec>=2.5, thus probing the reliability of the Chandra J1030 photometric redshifts. The spectroscopic campaign led to the serendipitous discovery of a z~2.78 large scale structure (LSS) in the J1030 field: the structure contains four X-ray sources (three of which were targeted in the LBT-MODS campaign) and two non-X-ray detected galaxies for which a VLT-MUSE spectrum was already available. The X-ray members of the LSS are hosted in galaxies that are significantly more massive (log(M_*/M_sun)=[10.0-11.1]) than those hosting the two MUSE-detected sources (log(M_*/M_sun)<10). Both observations and simulations show that massive galaxies, and particularly objects having log(M_*/M_sun)>10, are among the best tracers of large scale structures and filaments in the cosmic web. Consequently, our result can explain why X-ray-detected AGN have also been shown to be efficient tracers of large scale structures.

16 pages, 9 Figures. Accepted for publication in Astronomy and Astrophysics

References in corpus (45)

• Cosmic Star Formation History
• EAZY: A Fast, Public Photometric Redshift Code
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
• The Herschel view of the dominant mode of galaxy growth from z=4 to the present day
• Toward the Standard Population Synthesis Model of the X-Ray Background: Evolution of X-Ray Luminosity and Absorption Functions of Active Galactic Nuclei Including Compton-Thick Populations
• The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
• The 1% Concordance Hubble Constant
• X-ray spectral properties of AGN in the Chandra Deep Field South
• Obscuration-dependent evolution of Active Galactic Nuclei
• A massive proto-cluster of galaxies at a redshift of z {\approx} 5.3
• X-CIGALE: fitting AGN/galaxy SEDs from X-ray to infrared
• The MUSE 3D view of the Hubble Deep Field South
• Fitting AGN/galaxy X-ray-to-radio SEDs with CIGALE and improvement of the code
• High-redshift AGN in the Chandra Deep Fields: the obscured fraction and space density of the sub-$L_{\ast }$ population
• Gas filaments of the cosmic web located around active galaxies in a proto-cluster
• The star-formation history of K-selected galaxies
• The VIMOS Public Extragalactic Redshift Survey (VIPERS): Galaxy segregation inside filaments at $z\simeq 0.7$
• The infrared-radio correlation of star-forming galaxies is strongly M${}_{\star }$-dependent but nearly redshift-invariant since z$\sim$4
• No significant evolution of relations between Black hole mass and Galaxy total stellar mass up to z~2.5
• The Multiwavelength Survey by Yale-Chile (MUSYC): Deep Near-Infrared Imaging and the Selection of Distant Galaxies
• Supermassive Black Holes at High Redshift are Expected to be Obscured by their Massive Host Galaxies' Inter Stellar Medium
• The Hard X-Ray Luminosity Function of High-Redshift ($3<z\lesssim 5$) Active Galactic Nuclei
• The primordial environment of super massive black holes: large scale galaxy overdensities around $z\sim 6$ QSOs with LBT
• The VIMOS Ultra Deep Survey: The reversal of the star-formation rate $-$ density relation at $2<z<5$
• Mapping and characterisation of cosmic filaments in galaxy cluster outskirts: strategies and forecasts for observations from simulations
• On the cosmic evolution of AGN obscuration and the X-ray luminosity function: XMM-Newton and Chandra spectral analysis of the 31.3 deg${}^2$ Stripe 82X
• Dust and gas content of high-redshift galaxies hosting obscured AGN in the CDF-S
• The web of the Giant: spectroscopic confirmation of a Large Scale Structure around the z=6.31 quasar SDSS J1030+0524
• The 700 ks Chandra Spiderweb Field I: evidence for widespread nuclear activity in the Protocluster
• The quest for Type 2 quasars: Chandra observations of luminous obscured quasars in the Sloan Digital Sky Survey
• The primordial environment of supermassive black holes (II): deep Y and J band images around the z=6.3 quasar SDSS J1030+0524
• The Chandra COSMOS Legacy survey: the z>3 sample
• A Planck-selected dusty proto-cluster at z=2.16 associated with a strong over-density of massive H$\alpha$ emitting galaxies
• A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field
• Planck far-infrared detection of Hyper Suprime-Cam protoclusters at $\mathbf{z}\sim 4$: hidden AGN and star formation activity
• Implications of the Environments of Radio-detected AGN in a Complex Protostructure at z$\sim$3.3
• Chandra reveals a luminous Compton-thick QSO powering a $Ly\alpha$ blob in a $z=4$ starbursting protocluster
• X-ray redshifts for obscured AGN: a case study in the J1030 deep field
• The deep Chandra survey in the SDSS J1030+0524 field
• The XMM deep survey in the CDFS XI. X-ray properties of 185 bright sources
• SIPGI: an interactive pipeline for spectroscopic data reduction
• A deep 1.4 GHz survey of the J1030 equatorial field: a new window on radio source populations across cosmic time
• Redshift identification of X-ray selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources
• X-ray Sources in the SSA22 Chandra Field

Cited by in corpus (1)

• X-ray properties and obscured fraction of AGN in the J1030 Chandra field