Overdensity of submillimeter galaxies around the $z\simeq 2.3$ MAMMOTH-1 nebula

Abstract

In the hierarchical model of structure formation, giant elliptical galaxies form through merging processes within the highest density peaks known as protoclusters. While high-redshift radio galaxies usually pinpoint the location of these environments, we have recently discovered at z~2-3 three Enormous (>200 kpc) Lyman-Alpha Nebulae (ELANe) that host multiple AGN and that are surrounded by overdensities of Lyman-alpha Emitters (LAE). These regions are prime candidates of massive protoclusters in the early stages of assembly. To characterize the star-forming activity within these rare structures - both on ELAN and protocluster scales - we have initiated an observational campaign with the JCMT and the APEX telescopes. In this paper we report on sensitive SCUBA-2/JCMT 850 and 450 $\mu$m observations of a 128 arcmin${}^2$ field comprising the ELAN MAMMOTH-1, together with the peak of the hosting BOSS1441 LAE overdensity at z=2.32. These observations unveil $4.0\pm 1.3$ times higher source counts at 850 $\mu$m with respect to blank fields, likely confirming the presence of an overdensity also in obscured tracers. We find a strong detection at 850 $\mu$m associated with the continuum source embedded within the ELAN MAMMOTH-1, which - together with the available data from the literature - allow us to constrain the spectral energy distribution of this source to be of an ULIRG with a far-infrared luminosity of $L_{\mathrm{FIR}}^{\mathrm{SF}}=2.4_{-2.1}^{+7.4}\times 10^{12}$ L${}_{\odot }$, and hosting an obscured AGN. Such a source is thus able to power the hard photoionization plus outflow scenario depicted in Cai et al. (2017b) to explain the extended Lyman-alpha, HeII$\lambda 1640$ and CIV$\lambda 1549$ emission, and their kinematics. In addition, the two brightest detections at 850 $\mu$m ($f_{850}>18$ mJy) sit at the density peak of the LAEs overdensity, likely pinpointing the core of the protocluster.

arXiv comment17 pages, 12 figures, 8 tables; Accepted for publication in A&A

References in corpus (75)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Star Formation in Galaxies Along the Hubble Sequence
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• A Deep Sub-millimeter Survey of Lensing Clusters: A New Window on Galaxy Formation and Evolution
• Dusty Star-Forming Galaxies at High Redshift
• Lyman Alpha Imaging of a Proto-Cluster Region at <z>=3.09
• SCUBA-2: The 10000 pixel bolometer camera on the James Clerk Maxwell Telescope
• Revisiting the Infrared Spectra of Active Galactic Nuclei with a New Torus Emission Model
• An ALMA survey of Sub-millimeter Galaxies in the Extended Chandra Deep Field South: Physical properties derived from ultraviolet-to-radio modelling
• Distant Radio Galaxies and their Environments
• The Ages of Elliptical Galaxies in a Merger Model
• A cosmic web filament revealed in Lyman-alpha emission around a luminous high-redshift quasar
• Far-infrared Spectral Energy Distribution Fitting for Galaxies Near and Far
• Deep radio imaging of the SCUBA 8-mJy survey fields: sub-mm source identifications and redshift distribution
• The SCUBA-2 Cosmology Legacy Survey: 850um maps, catalogues and number counts
• SCUBA-2: iterative map-making with the Sub-Millimetre User Reduction Facility
• The SCUBA HAlf Degree Extragalactic Survey (SHADES) - III. Identification of radio and mid-infrared counterparts to submillimetre galaxies
• A Subaru Search for Ly-alpha Blobs in and around the Proto-cluster Region at Redshift z=3.1
• SCUBA-2: on-sky calibration using submillimetre standard sources
• An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field South: High resolution 870um source counts
• Quasar Quartet Embedded in Giant Nebula Reveals Rare Massive Structure in Distant Universe
• The Massive Hosts of Radio Galaxies Across Cosmic Time
• Discovery of a galaxy cluster with a violently starbursting core at z=2.506
• A massive core for a cluster of galaxies at a redshift of 4.3
• Energetic galaxy-wide outflows in high-redshift ultra-luminous infrared galaxies hosting AGN activity
• Extended Lyman-alpha emission from cold accretion streams
• Protoclusters associated with z > 2 radio galaxies. I. Characteristics of high redshift protoclusters
• An extreme proto-cluster of luminous dusty starbursts in the early Universe
• Lyman Alpha Blobs as an Observational Signature of Cold Accretion Streams into Galaxies
• The SCUBA-2 Cosmology Legacy Survey: ALMA resolves the bright-end of the sub-millimeter number counts
• Characterisation of SCUBA-2 450um and 850um-selected Galaxies in the COSMOS Field
• A massive, distant proto-cluster at z=2.47 caught in a phase of rapid formation?
• An excess of dusty starbursts related to the Spiderweb galaxy
• The rapid assembly of an elliptical galaxy of 400 billion solar masses at a redshift of 2.3
• An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Near-infrared morphologies and stellar sizes
• Discovery of an Enormous Ly$\alpha$ nebula in a massive galaxy overdensity at $z=2.3$
• Connecting the cosmic infrared background to the X-ray background
• The Ubiquity of Coeval Starbursts in Massive Galaxy Cluster Progenitors
• The Lyman alpha Reference Sample: Extended Lyman alpha Halos Produced at Low Dust Content
• Giant Lya nebulae associated with high redshift radio galaxies
• Kinematically quiet halos around z~2.5 radio galaxies. Keck spectroscopy
• The Spitzer High Redshift Radio Galaxy Survey
• AGNfitter: A Bayesian MCMC approach to fitting spectral energy distributions of AGN
• Gas-rich mergers and feedback are ubiqitous amongst starbursting radio galaxies, as revealed by JVLA, IRAM PdBI and Herschel
• MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$
• Inspiraling Halo Accretion Mapped in Lyman-$\alpha$ Emission around a $z\sim 3$ Quasar
• Stellar Populations of Lyman Alpha Emitters at z = 3 - 4 Based on Deep Large Area Surveys in the Subaru-SXDS/UKIDSS-UDS Field
• The Subaru Ly-alpha blob survey: A sample of 100 kpc Ly-alpha blobs at z=3
• The SCUBA-2 Cosmology Legacy Survey: blank-field number counts of 450um-selected galaxies and their contribution to the cosmic infrared background
• An AzTEC 1.1 mm survey of the GOODS-N field -- II. Multi-wavelength identifications and redshift distribution
• Witnessing the birth of the red sequence: ALMA high-resolution imaging of [CII] and dust in two interacting ultra-red starbursts at z = 4.425
• Resolving the Cosmic Far-Infrared Background at 450 and 850 Microns with SCUBA-2
• The nature of luminous Lyman-alpha emitters at z~2-3: maximal dust-poor starbursts and highly ionising AGN
• Integral Field Spectroscopy of 2.0<z<2.7 Sub-mm Galaxies; gas morphologies and kinematics
• Strong Field-to-Field Variation of Lyman alpha Nebulae Populations at z~2.3
• Deep HeII and CIV Spectroscopy of a Giant Lyman alpha Nebula: Dense Compact Gas Clumps in the Circumgalactic Medium of a z~2 Quasar
• The Nature of Lya Blobs: Supernova-Dominated Primordial Galaxies
• The SCUBA-2 Cosmology Legacy Survey: Multi-wavelengths counterparts to 10${}^3$ submillimeter galaxies in the UKIDSS-UDS field
• The SCUBA-2 Cosmology Legacy Survey: Ultraluminous star-forming galaxies in a z=1.6 cluster
• Searching for large-scale structures around high-redshift radio galaxies with Herschel
• The SCUBA-2 Cosmology Legacy Survey: The EGS deep field I - Deep number counts and the redshift distribution of the recovered Cosmic Infrared Background at 450 and 850 um
• Keck/Palomar Cosmic Web Imagers (KCWI/PCWI) Reveal an Enormous Ly$\alpha$ Nebula in an Extremely Overdense QSO Pair Field at $z=2.45$
• SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-End Counts at 450 um
• Large scale structure around a z=2.1 cluster
• Resolving the optical emission lines of Lya blob 'B1' at z=2.38: another hidden quasar
• Faint Submillimter Galaxy Counts at 450 micron
• Herschel protocluster survey: A search for dusty star-forming galaxies in protoclusters at z=2-3
• The environments of high redshift radio galaxies and quasars: probes of protoclusters
• A Deep Narrowband Imaging Search for CIV and He II Emission from Ly$\alpha$ Blobs
• Overturning the Case for Gravitational Powering in the Prototypical Cooling Lyman-alpha Nebula
• ALMA observations of Lyman-alpha Blob 1: halo sub-structure illuminated from within
• AzTEC 1.1 mm observations of high-z protocluster environments: SMG overdensities and misalignment between AGN jets and SMG distribution
• Are we seeing accretion flows in a 250kpc-sized Ly-alpha halo at z=3?
• AzTEC 1.1 mm images of 16 radio galaxies at 0.5<z<5.2 and a quasar at z=6.3
• ALMA reveals Strong [CII] emission in a galaxy embedded in a giant Lyman-alpha blob at z=3.1

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• MUSE Analysis of Gas around Galaxies (MAGG) -- III: The gas and galaxy environment of z = 3-4.5 quasars
• Inspiraling streams of enriched gas observed around a massive galaxy 11 billion years ago
• Planck far-infrared detection of Hyper Suprime-Cam protoclusters at $\mathbf{z}\sim 4$: hidden AGN and star formation activity
• Submillimetre galaxies in two massive protoclusters at z = 2.24: witnessing the enrichment of extreme starbursts in the outskirts of HAE density peaks
• The cold circumgalactic environment of MAMMOTH-I: dynamically cold gas in the core of an Enormous Ly-alpha Nebula
• A Multiwavelength Study of ELAN Environments (AMUSE${}^2$). Mass budget, satellites spin alignment and gas infall in a massive $z\sim 3$ quasar host halo
• The Ionised- and Cool-Gas Content of The BR1202-0725 System as seen by MUSE and ALMA
• A Multiwavelength Study of ELAN Environments (AMUSE${}^2$): Detection of a dusty star-forming galaxy within the enormous Lyman $\alpha$ nebula at $z=2.3$ sheds light on its origin
• Protocluster detection in simulations of HSC-SSP and the 10-year LSST forecast, using PCcones
• A Multiwavelength Study of ELAN Environments (AMUSE${}^2$): Ubiquitous dusty star-forming galaxies associated with enormous Ly$\alpha$ nebulae on megaparsec scales
• Measuring the total infrared light from galaxy clusters at z=0.5-1.6: connecting stellar populations to dusty star formation
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• APEX at the QSO MUSEUM: molecular gas reservoirs associated with $z\sim$3 quasars and their link to the extended Ly$\alpha$ emission
• Discovery of a protocluster core associated with an enormous Ly$\alpha$ Nebula at $z=2.3$
• ASW${}^2$DF: Census of the obscured star formation in a galaxy cluster in formation at $z=2.2$
• JCMT/SCUBA-2 uncovers an excess of $850\mu$m counts on megaparsec scales around high-redshift quasars. Characterization of the overdensities and their alignment with the quasars' Ly$\alpha$ nebulae
• The WISSH quasars project VII. Outflows and metals in the circumgalactic medium around the hyper-luminous z~3.6 quasar J1538+08
• Probing the Mpc-scale environment of hyperluminous infrared galaxies at 2<z<4
• Deep Submillimetre and Radio Observations in the SSA22 Field. II. Sub-millimetre source catalogue and number counts
• LATIS: A Sample of IGM-selected Protoclusters and Protogroups at $z\sim 2.5$
• JWST reveals extended stellar disks for ALMA-bright dusty star-forming galaxies in the Spiderweb protocluster
• Brighter and More Massive Galaxies in the Vicinity of Lyman-alpha Nebulae
• ADF22+: a declining faint end in the far-infrared luminosity function in the SSA22 protocluster at z=3.09
• Submillimeter galaxy overdensities around physically associated quasar pairs
• J-PAS: Discovery of RaJav, a bright spatially extended Ly$\alpha$ Nebula at z=2.25
• The Photometric Analysis of the Environment Around Two Dusty Star-Forming Galaxies at $z\sim 2$