Identifying Luminous AGN in Deep Surveys: Revised IRAC Selection Criteria

Abstract

Spitzer IRAC selection is a powerful tool for identifying luminous AGN. For deep IRAC data, however, the AGN selection wedges currently in use are heavily contaminated by star-forming galaxies, especially at high redshift. Using the large samples of luminous AGN and high-redshift star-forming galaxies in COSMOS, we redefine the AGN selection criteria for use in deep IRAC surveys. The new IRAC criteria are designed to be both highly complete and reliable, and incorporate the best aspects of the current AGN selection wedges and of infrared power-law selection while excluding high redshift star-forming galaxies selected via the BzK, DRG, LBG, and SMG criteria. At QSO-luminosities of log L(2-10 keV) (ergs/s) > 44, the new IRAC criteria recover 75% of the hard X-ray and IRAC-detected XMM-COSMOS sample, yet only 38% of the IRAC AGN candidates have X-ray counterparts, a fraction that rises to 52% in regions with Chandra exposures of 50-160 ks. X-ray stacking of the individually X-ray non-detected AGN candidates leads to a hard X-ray signal indicative of heavily obscured to mildly Compton-thick obscuration (log N_H (cm^-2) = 23.5 +/- 0.4). While IRAC selection recovers a substantial fraction of luminous unobscured and obscured AGN, it is incomplete to low-luminosity and host-dominated AGN.

22 pages, 15 figures, accepted for publication in ApJ, full resolution version available at http://www.stsci.edu/~donley/iragn_paper/

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• Spectropolarimetry of High Redshift Obscured and Red Quasars
• Confirming the Quiescent Galaxy Population out to $z=3$: A Stacking Analysis of Mid-, Far-Infrared and Radio Data
• A Spitzer survey of Deep Drilling Fields to be targeted by the Vera C. Rubin Observatory Legacy Survey of Space and Time
• Stellar Populations of UV-Selected Active Galactic Nuclei Host Galaxies at z ~ 2 - 3
• The VLA-COSMOS 3 GHz Large Project: Star formation properties and radio luminosity functions of AGN with moderate-to-high radiative luminosities out to $z\sim 6$
• Revolutionizing Our Understanding of AGN Feedback and its Importance to Galaxy Evolution in the Era of the Next Generation Very Large Array
• Deep GMRT 610 MHz Observations of the ELAIS N1 Field : Catalogue and Source Counts
• Completing the Census of AGN in GOODS-S/HUDF: New Ultra-Deep Radio Imaging and Predictions for JWST
• Tracing the evolution of dust-obscured activity using sub-millimetre galaxy populations from STUDIES and AS2UDS
• Low-luminosity AGN and X-ray binary populations in COSMOS star-forming galaxies
• Hard X-ray selected AGNs in low-mass galaxies from the NuSTAR serendipitous survey
• The eMERGE Survey I: Very Large Array 5.5 GHz observations of the GOODS-North Field
• Infrared Contributions of X-Ray Selected Active Galactic Nuclei in Dusty Star-Forming Galaxies
• Giant scattering cones in obscured quasars
• AGN Selection Methods Have Profound Impacts on the Distributions of Host Galaxy Properties
• JWST MIRI Flight Performance: Imaging
• MIGHTEE: Deep 1.4 GHz Source Counts and the Sky Temperature Contribution of Star Forming Galaxies and Active Galactic Nuclei
• Stars and gas in the most metal-poor galaxies I: COS and MUSE observations of SBS 0335-052E
• NuSTAR unveils a heavily obscured low-luminosity Active Galactic Nucleus in the Luminous Infrared Galaxy NGC 6286
• A structure function analysis of VST-COSMOS AGN
• Mergers as triggers for nuclear activity: A near-IR study of the close environment of AGN in the VISTA-VIDEO survey
• Optically variable active galactic nuclei in the 3 yr VST survey of the COSMOS field
• Evidence for Widespread AGN Activity among Massive Quiescent Galaxies at z ~ 2
• A Spectroscopic Survey of WISE-selected Obscured Quasars with the Southern African Large Telescope
• SHARDS: Constraints on the dust attenuation law of star-forming galaxies at z~2
• The Massive and Distant Clusters of WISE Survey IV: The Distribution of Active Galactic Nuclei in Galaxy Clusters at $z\sim 1$
• ALMA constraints on star-forming gas in a prototypical z=1.5 clumpy galaxy: the dearth of CO(5-4) emission from UV-bright clumps
• Ages of massive galaxies at $0.5<z<2.0$ from 3D-HST rest-frame optical spectroscopy
• Highlights and Discoveries from the Chandra X-ray Observatory
• The XMM deep survey in the CDF-S II. a 9-20 keV selection of heavily obscured active galaxies at z>1.7
• A Catalog of Host Galaxies for WISE-Selected AGN: Connecting Host Properties with Nuclear Activity and Identifying Contaminants
• The protoplanetary disks in the nearby massive star forming region Cygnus OB2
• The WISE-2MASS Survey: Red Quasars Into the Radio Quiet Regime
• Pan-STARRS1 variability of XMM-COSMOS AGN. I. Impact on photometric redshifts
• The Subaru-XMM-Newton Deep Survey (SXDS) VIII.: Multi-wavelength Identification, Optical/NIR Spectroscopic Properties, and Photometric Redshifts of X-ray Sources
• SUDARE-VOICE variability-selection of Active Galaxies in the Chandra Deep Field South and the SERVS/SWIRE region
• SUPER V. ALMA continuum observations of z~2 AGN and the elusive evidence of outflows influencing star formation
• Robust Identification of Active Galactic Nuclei through HST Optical Variability in GOODS-S: Comparison with the X-ray and mid-IR Selected Samples
• The X-ray View of Merger-Induced AGN Activity at Low Redshift
• The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information
• Radio spectra and sizes of ALMA-identified submillimetre galaxies: evidence of age-related spectral curvature and cosmic ray diffusion?
• A panchromatic view of infrared quasars: excess star formation and radio emission in the most heavily obscured systems
• In and out star formation in z~1.5 quiescent galaxies from rest-frame UV spectroscopy and the far-infrared
• CLEAR: High-Ionization [Ne V] $\lambda$3426 Emission-line Galaxies at $1.4<z<2.3$
• A large, deep 3 deg${}^2$ survey of H$\alpha$, [OIII], and [OII] emitters from LAGER: constraining luminosity functions
• The SEDs, Host Galaxies and Environments of Variability Selected AGN in GOODS-S
• Multi-wavelength properties of radio and machine-learning identified counterparts to submillimeter sources in S2COSMOS
• The KMOS Galaxy Evolution Survey (KGES): the angular momentum of star-forming galaxies over the last ~10 Gyr
• On R-W1 as A Diagnostic to Discover Obscured Active Galactic Nuclei in Wide-Area X-ray Surveys
• The Past and Future of Mid-Infrared Studies of AGN
• The space density of Compton-thick AGN at z~0.8 in the zCOSMOS-Bright Survey
• Active Galactic Nuclei as seen by the Spitzer Space Telescope
• The faint source population at 15.7 GHz - III. A high-frequency study of HERGs and LERGs
• Dependence of the IRX-$\beta$ dust attenuation relation on metallicity and environment
• [OIII] emission line as a tracer of star-forming galaxies at high redshifts: Comparison between H$\alpha$ and [OIII] emitters at $z$=2.23 in HiZELS
• Green galaxies in the COSMOS field
• The average dust attenuation curve at z~1.3 based on HST grism surveys
• Spitzer Observations of the North Ecliptic Pole
• The UV 2175Å Attenuation Bump and its Correlation with PAH Emission at z~2
• A census of galaxy constituents in a Coma Progenitor observed at z>3
• Continuous Mid-Infrared Star Formation Rate Indicators: Diagnostics for 0<z<3 Star Forming Galaxies
• A random forest-based selection of optically variable AGN in the VST-COSMOS field
• The Evolution of Gas-Phase Metallicity and Resolved Abundances in Star-forming Galaxies at $z\approx 0.6-1.8$
• Stellar Mass Growth of Brightest Cluster Galaxy Progenitors in COSMOS Since z ~ 3
• The bright end of the infrared luminosity functions and the abundance of hyperluminous infrared galaxies
• Spitzer Spectroscopy of Infrared-Luminous Galaxies: Diagnostics of AGN and Star Formation and Contribution to Total Infrared Luminosity
• The Fine Line Between Normal and Starburst Galaxies
• JWST/MIRI Simulated Imaging: Insights into Obscured Star-Formation and AGN for Distant Galaxies in Deep Surveys
• High-resolution VLA Imaging of Obscured Quasars: Young Radio Jets Caught in a Dense ISM
• THE MOSDEF SURVEY: The Nature of Mid-Infrared Excess Galaxies and a Comparison of IR and UV Star Formation Tracers at z~2
• The environmental properties of radio-emitting AGN
• Molecular Gas during the Post-Starburst Phase: Low Gas Fractions in Green Valley Seyfert Post-Starburst Galaxies
• Infrared and X-Ray Evidence of an AGN in the NGC 3256 Southern Nucleus
• Stellar and Dust Properties of a Complete Sample of Massive Dusty Galaxies at $1\le z\le 4$ from MAGPHYS Modeling of UltraVISTA DR3 and Herschel Photometry
• CEERS: MIRI deciphers the spatial distribution of dust-obscured star formation in galaxies at $0.1<z<2.5$
• A census of radio-selected AGN on the COSMOS field and of their FIR properties
• A Quick Look at the 3GHz Radio Sky. II. Hunting for DRAGNs in the VLA Sky Survey
• Galaxy inclination and the IRX-beta relation: Effects on UV star-formation rate measurements at intermediate to high redshifts
• Multidimensional Data Driven Classification of Emission-line Galaxies
• Radio galaxies in ZFOURGE/NMBS: no difference in the properties of massive galaxies with and without radio-AGN out to z = 2.25
• No More Active Galactic Nuclei in Clumpy Disks Than in Smooth Galaxies at z~2 in CANDELS / 3D-HST
• CHILES VERDES: Radio variability at an unprecedented depth and cadence in the COSMOS field
• S2COSMOS: Evolution of Gas Mass with Redshift Using Dust Emission
• Deep ALMA photometry of distant X-ray AGN: improvements in star formation rate constraints, and AGN identification
• GAMA/DEVILS: Cosmic star formation and AGN activity over 12.5 billion years
• Molecular gas in two companion cluster galaxies at z=1.2
• Near Infrared Spectra and Intrinsic Luminosities of Candidate Type II Quasars at 2 < z < 3.4
• The LOFAR Two-metre Sky Survey Deep fields: A new analysis of low-frequency radio luminosity as a star-formation tracer in the Lockman Hole region
• A Comparison of Photometric Redshift Techniques for Large Radio Surveys
• X-ray observations of dust obscured galaxies in the Chandra Deep Field South
• Stellar populations and star formation histories of the most extreme [OIII] emitters at $z=1.3-3.7$
• Star formation in galaxies hosting AGN: A flat trend of star-formation rate with X-ray luminosity of galaxies hosting AGN in the SCUBA-2 Cosmology Legacy Survey
• A Highly Magnified Gravitationally Lensed Red QSO at z = 2.5 with a Significant Flux Ratio Anomaly
• New constraints on the 1.4 GHz source number counts and luminosity functions in the Lockman Hole field
• Host Dark Matter Halos of WISE-selected Obscured & Unobscured Quasars: Evidence for Evolution
• The composite nature of Dust-Obscured Galaxies (DOGs) at z~2-3 in the COSMOS field: I. A Far-Infrared View
• JWST's PEARLS: TN J1338-1942 -- I. Extreme jet triggered star-formation in a $z=4.11$ luminous radio galaxy
• The AGN contribution to the UV-FIR luminosities of interacting galaxies and its role in identifying the Main Sequence
• A Multiwavelength view of IC 860: What Is in Action inside Quenching Galaxies
• An insight into the extragalactic transient and variable microJy radio sky across multiple decades
• The Hunt for Red Quasars: Luminous Obscured Black Hole Growth Unveiled in the Stripe 82 X-ray Survey
• Molecular gas in radio galaxies in dense Mpc-scale environments at $z=0.4-2.6$
• Galaxy And Mass Assembly: the evolution of the cosmic spectral energy distribution from z = 1 to z = 0
• Probing star formation and ISM properties using galaxy disk inclination I: Evolution in disk opacity since $z\sim 0.7$
• Genuine Retrieval of the AGN Host Stellar Population (GRAHSP)
• The XMM-Newton deep survey in the CDF-S VI. Obscured AGN selected as infrared power-law galaxies
• The Accretion History of AGN: A Newly Defined Population of Cold Quasars
• Mapping the Morphology and Kinematics of a Lyman-alpha-selected Nebula at z=3.15 with MUSE
• The effect of active galactic nuclei on the cold interstellar medium in distant star-forming galaxies
• Searching for luminous absorbed sources in the WISE AGN catalogue
• Nowhere to Hide: Radio-faint AGN in the GOODS-N field. II. Multi-wavelength AGN selection techniques and host galaxy properties
• Probing the Timescale of the 1.4 GHz Radio emissions as a Star formation tracer
• Extending the variability selection of active galactic nuclei in the W-CDF-S and SERVS/SWIRE region
• Radio spectral properties of star-forming galaxies between 150-5000MHz in the ELAIS-N1 field
• The Role of AGN in Luminous Infrared Galaxies from the Multiwavelength Perspective
• Piercing through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields. II. Are Highly Obscured AGNs the Missing Link in the Merger-Triggered AGN-Galaxy Coevolution Models?
• AKARI mid-infrared slitless spectroscopic survey of star-forming galaxies at $z\lesssim 0.5$
• Multi-wavelength landscape of the young galaxy cluster RXJ1257.2+4738 at z=0.866: I. The infrared view
• The XXL Survey: XXXI. Classification and host galaxy properties of 2.1 GHz ATCA XXL-S radio sources
• Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
• Heavily Obscured AGN detection: a Radio vs X-ray challenge
• Evidence for gas-phase metal deficiency in massive protocluster galaxies at z~2.2
• A deep 1.4 GHz survey of the J1030 equatorial field: a new window on radio source populations across cosmic time
• K-CLASH: spatially-resolving star-forming galaxies in field and cluster environments at $z\approx 0.2$-$0.6$
• Physical properties of compact star-forming galaxies at $z\sim 2-3$
• Steadily Increasing Star Formation Rates in Galaxies Observed at 3 <~ z <~ 5 in the CANDELS/GOODS-S Field
• The Nature of the Faint Low-Frequency Radio Source Population
• Radio AGN Selection and Characterization in Three Deep-Drilling Fields of the Vera C. Rubin Observatory Legacy Survey of Space and Time
• A Generalized Power-Law Diagnostic for Infrared Galaxies at z>1: Active Galactic Nuclei and Hot Interstellar Dust
• COLDz: Deep 34 GHz Continuum Observations and Free-free Emission in High-redshift Star-forming Galaxies
• JADES: Rest-frame UV-to-NIR Size Evolution of Massive Quiescent Galaxies from Redshift z=5 to z=0.5
• Forward modeling the multiwavelength properties of Active Galactic Nuclei: application to X-ray and WISE mid-infrared samples
• Continuum optical-UV and X-ray variability of AGN: current results and future challenges
• Host galaxy properties and environment of obscured and unobscured X-ray selected Active Galactic Nuclei in the COSMOS survey
• Identification of AGN in the XMM-Newton X-ray survey of the SMC
• The resolved chemical abundance properties within the interstellar medium of star-forming galaxies at $\text{z}\approx 1.5$
• The Invisible AGN Catalogue: A Mid-Infrared - Radio Selection Method for Optically-Faint Active Galactic Nuclei
• The LOFAR Two-metre Sky Survey Deep Fields -- Data Release 1: IV. Photometric redshifts and stellar masses
• K-CLASH: Strangulation and Ram Pressure Stripping in Galaxy Cluster Members at 0.3 < z < 0.6
• Discovery of Massive, Mostly Star-formation Quenched Galaxies with Extremely Large Lyman-alpha Equivalent Widths at z ~ 3
• Submm/mm Galaxy Counterpart Identification Using a Characteristic Density Distribution
• The eROSITA Final Equatorial-Depth Survey (eFEDS): The first archetypal Quasar in the feedback phase discovered by eROSITA
• The dependency of AGN infrared color-selection on source luminosity and obscuration: An observational perspective in CDFS and COSMOS
• On the Impact of Inclination-Dependent Attenuation on Derived Star Formation Histories: Results from Disk Galaxies in the Great Observatories Origins Deep Survey Fields
• Does AGN Fraction Depend on Redshift or Luminosity? An Extinction-Free Test by 18-band Mid-infrared SED Fitting in the AKARI NEP Wide Field
• Evolution of Dust-Obscured Star Formation and Gas to z=2.2 from HiZELS
• A Fully-Identified Sample of AEGIS20 Microjansky Radio Sources
• A versatile classification tool for galactic activity using optical and infrared colors
• LADUMA: Discovery of a luminous OH megamaser at $z>0.5$
• The ATLAS 9.0 GHz Survey of the Extended Chandra Deep Field South: The Faint 9.0 GHz Radio Population
• The OTELO survey. III. Demography, morphology, IR luminosity and environment of AGN hosts
• The Infrared Properties of Sources Matched in the WISE all-sky and Herschel-ATLAS Surveys
• Getting ready for the LSST data -- estimating the physical properties of $z<2.5$ main sequence galaxies
• Surveys of the Cosmic X-ray Background
• Deep uGMRT observations of the ELAIS-North 1 field: statistical properties of radio--infrared relations up to $z\sim$2
• Obscured AGN enhancement in galaxy pairs at cosmic noon: evidence from a probabilistic treatment of photometric redshifts
• Where Do Obscured AGN Fit in A Galaxy's Timeline?
• The XMM Deep Survey in the CDF-S VII. UV catalogue of the Optical Monitor observations
• Determining the fraction of reddened quasars in COSMOS with multiple selection techniques from X-ray to radio wavelengths
• A CO Survey of SpARCS Star-Forming Brightest Cluster Galaxies: Evidence for Uniformity in BCG Molecular Gas Processing Across Cosmic Time
• Cold Dust Emission from X-ray AGN in the SCUBA-2 Cosmology Legacy Survey: Dependence on Luminosity, Obscuration & AGN Activity
• Cosmic evolution of radio-excess AGNs in quiescent and star-forming galaxies across $0<z<4$
• AKARI/IRC source catalogues and source counts for the IRAC Dark Field, ELAIS North and the AKARI Deep Field South
• Obscuration properties of mid-IR selected AGN
• GALFIT-ing AGN Host Galaxies in COSMOS: HST vs. Subaru
• The Evolution of the Low-Frequency Radio AGN Population to $z\simeq 1.5$ in the ELAIS N1 Field
• The MOSDEF Survey: Calibrating the relationship between H$\alpha$ star-formation rate and radio continuum luminosity at $1.4<z<2.6$
• The unification of powerful quasars and radio galaxies and their relation to other massive galaxies
• Active Galactic Nuclei and their Role in Galaxy Evolution: The Infrared Perspective
• The effect of the morphological quenching mechanism on star formation activity at 0.5 < z < 1.5 in 3D-HST/CANDELS
• Revisiting the Color-Color Selection: Submillimeter and AGN Properties of NUV-r-J Selected Quiescent Galaxies
• AGN in Dusty Starbursts at Z=2: Feedback Still To Kick In
• Selection of AGN candidates in the GOODS-South Field through SPITZER/MIPS 24 $\mu$m variability
• The Baltimore Oriole's Nest: Cool Winds from the Inner and Outer Parts of a Star-Forming Galaxy at z=1.3
• Exploring the Intrinsic Scatter of the Star-Forming Galaxy Main Sequence at redshift 0.5 to 3.0
• The VMC Survey -- XLIX. Discovery of a population of quasars dominated by nuclear dust emission behind the Magellanic Clouds
• A study on the Clustering Properties of Radio-Selected sources in the Lockman Hole Region at 325 MHz
• Resolving galactic-scale obscuration of X-ray AGN at $z\gtrsim 1$ with COSMOS-Web
• Selection of optically variable active galactic nuclei via a random forest algorithm
• The Luminosity and Stellar Mass Functions of Red W1-W2 Galaxies
• Revealing the differences in the SMBH accretion rate distributions of starburst and non-starburst galaxies
• HerMES: Disentangling active galactic nuclei and star formation in the radio source population
• Consistent analysis of the AGN LF in X-ray and MIR in the XMM-LSS field
• Probing star formation and ISM properties using galaxy disk inclination III: Evolution in dust opacity and clumpiness between redshift 0.0 < z < 0.7 constrained from UV to NIR
• A search for X-ray absorbed sources in the 3XMM catalogue, using photometric redshifts and Bayesian spectral fits
• Euclid preparation. Observational expectations for redshift z<7 active galactic nuclei in the Euclid Wide and Deep surveys
• Infrared Colours and Spectral Energy Distributions of Hard X-ray Selected Obscured and Compton-thick AGN
• Low-frequency radio spectra of submillimetre galaxies in the Lockman Hole
• The VLA-COSMOS 3 GHz Large Project: Average radio spectral energy distribution of active galactic nuclei
• An interacting galaxy pair at the origin of a light echo
• Environment of $1\le z\le 2$ obscured and unobscured AGNs in the Extended Chandra Deep Field South
• Infrared-detected AGNs in the Local Universe
• Measuring Stellar Masses of Emission Line Galaxies at 1.2<z<1.9
• Stellar, Gas, and Dust Emission of Star Forming Galaxies out to z~2
• Evidence for non-stellar rest-frame near-IR emission associated with increased star formation in galaxies at $z\sim 1$
• A Peculiar Type~II QSO Identified via Broad-band Detection of Extreme Nebular Line Emission
• Infrared spectroscopic confirmation of z~2 photometrically-selected obscured quasars
• UV-FIR SED modeling of AGN in IR-luminous galaxies up to z~2.5: Understanding the effects of torus models
• Stellar Mass and 3.4 $\mu$m M/L Ratio Evolution of Brightest Cluster Galaxies in COSMOS since z ~ 1.0
• The Importance of Dust Distribution in Ionizing-photon Escape: NIRCam and MIRI Imaging of a Lyman Continuum-emitting Galaxy at z ~ 3.8
• The hunt for red AGN: a new infrared diagnostic
• Redshift identification of X-ray selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources
• The H$\alpha$ and [O III] $\lambda 5007$ Luminosity Functions of $1.2<z<1.9$ Emission-Line Galaxies from HST Grism Spectroscopy
• A multi-band AGN-SFG classifier for extragalactic radio surveys using machine learning
• The Spitzer-IRAC/MIPS Extragalactic Survey (SIMES): II enhanced nuclear accretion rate in galaxy groups at z$\sim$0.2
• Properties of IR selected Active Galactic Nuclei
• X-ray Analysis of AGN from the GALEX Time Domain Survey
• The optical luminosity function of LOFAR radio-selected quasars at $1.4\le z\le 5.0$ in the NDWFS-Boötes field
• The Complex X-ray Obscuration Environment in the Radio Loud Type 2 Quasar 3C 223
• The Radio Spectral Energy Distribution and Star Formation Calibration in MIGHTEE-COSMOS Highly Star-Forming Galaxies at 1.5 < z < 3.5
• Core prominence as a signature of restarted jet activity in the LOFAR radio-galaxy population
• Star formation history of $0.1\le \text{z}\le 1.5$ mass-selected galaxies in the ELAIS-N1 Field
• Reconciling PTA and JWST and preparing for LISA with POMPOCO: a Parametrisation Of the Massive black hole POpulation for Comparison to Observations
• Active Galactic Nuclei in the Green Valley at z$\sim$0.7
• Are the hosts of VLBI selected radio-AGN different to those of radio-loud AGN?
• The Impact of Inclination-dependent Attenuation on Ultraviolet Star Formation Rate Tracers
• pop-cosmos: Insights from generative modeling of a deep, infrared-selected galaxy population
• Hot-Dust (690K) Luminosity Density and its Evolution in the last 7.5Gyr
• Beyond diagnostic-diagrams: A critical exploration on the classification of ionization processes
• The OTELO survey: Revealing a population of low-luminosity current/active star-forming galaxies at z$\sim 0.9$
• The Lockman--SpReSO project. Main properties of infrared selected star-forming galaxies
• Cosmic X-ray surveys of Active Galactic Nuclei: synergy between X-ray and infrared observations
• Exploring the physical properties of Type II Quasar candidates at intermediate redshifts with CIGALE
• The Feasibility and Flexibility of Selecting Quasars by Variability Using Ensemble Machine Learning Algorithms
• A new search for variability-selected active galaxies within the VST SUDARE-VOICE survey: the Chandra Deep Field South and the SERVS-SWIRE area
• Host galaxy and nuclear properties of IR-selected AGNs with and without outflow signatures
• Through the fog: a complementary optical galaxy classification scheme for 'intermediate' redshifts
• Nature of hard X-ray (3-24 keV) detected luminous infrared galaxies in the COSMOS field
• Disentangling AGN and Star Formation Activity at High Redshift Using Hubble Space Telescope Grism Spectroscopy
• Obscured accretion from AGN surveys
• Detailed study of the Bootes field using 300-500 MHz uGMRT observations: Source Properties and radio--infrared correlations
• Lower-Luminosity Obscured AGN Host Galaxies are Not Predominantly in Major-Merging Systems at Cosmic Noon
• Enhanced AGN Activity in Overdense Galactic Environments at $2<z<4$
• The Nature of LoBAL QSOs: II. HST/WFC3 Observations Reveal Host Galaxies Dominated by Mergers
• Navigating AGN variability with self-organizing maps
• Star formation activity in a young galaxy cluster at z=0.866
• A galaxy cluster in the innermost Zone of Avoidance, close to the radio phoenix VLSSJ2217.5+594
• Radio Galaxies in SIMBA: A MIGHTEE Comparison
• Hosts and environments: a (large-scale) radio history of AGN and star-forming galaxies
• Detection of radio-AGN in dust-obscured galaxies using deep uGMRT radio continuum observations
• ALMA measures molecular gas reservoirs comparable to field galaxies in a low-mass galaxy cluster at z=1.3
• Ultraviolet-to-far-infra-red self-consistent analysis of the stellar populations of massive starburst galaxies at intermediate redshifts
• Mid-infrared Variability-based AGN Selection using the Multi-epoch Photometric Data from WISE
• Identifying Compton-thick active galactic nuclei in the COSMOS. II. Searching among mid-infrared selected AGNs
• Effectiveness of WISE colour-based selection techniques to uncover obscured AGN
• PHIBSS: Searching for Molecular Gas Outflows in Star-Forming Galaxies at $z=$ 0.5-2.6
• The Lockman-SpReSO project. Galactic flows in a sample of far-infrared galaxies
• Compton-thick AGN Characterisation in a Multi-wavelength Context: Insights from the 70-Month \textit{SWIFT}/BAT Catalogue
• A GMRT 610 MHz radio survey of the North Ecliptic Pole (NEP, ADF-N) / Euclid Deep Field North
• Separating the Optical to Near-Infrared Light of AGN and Their Host Galaxies
• Star formation at z$\sim$0.9 from the OTELO survey: A comprehensive view combining deep optical spectroscopy and infrared data
• Fueling, Evolution, and Diversity of AGN in Dwarf Galaxies: Insights from Star Formation and Black Hole Scaling Relations
• The Compact Star-Forming Galaxies at $2<z<3$ in 3D-HST/CANDELS: AGN and Non-AGN Physical Properties
• Astro2020 Science White Paper: Black Hole Growth in Mergers and Dual AGN
• MIDIS: Quantifying the AGN component of X-ray-detected galaxies