2024
DAVOS: Dwarf Active Galactic Nuclei from Variability for the Origins of Seeds: Properties of Variability-selected Active Galactic Nuclei in the COSMOS Field and Expectations for the Rubin Observatory
Burke C, Liu Y, Ward C, Liu X, Natarajan P, Greene J. DAVOS: Dwarf Active Galactic Nuclei from Variability for the Origins of Seeds: Properties of Variability-selected Active Galactic Nuclei in the COSMOS Field and Expectations for the Rubin Observatory. The Astrophysical Journal 2024, 971: 140. DOI: 10.3847/1538-4357/ad54ca.Peer-Reviewed Original ResearchActive galactic nucleiBlack holeGalactic nucleiCOSMOS fieldIntermediate-mass black hole candidatesHost galaxy stellar massVirial black hole massesVariable active galactic nucleiHyper Suprime-Cam Subaru Strategic ProgramBroad-line widthsStellar mass relationBlack hole candidatesBlack hole massCentral black holeHigh-precision photometryGalaxy stellar massStellar mass estimatesLow-mass galaxiesEarly-type galaxiesSubaru Strategic ProgramBroad-lineHole massStellar massActive galaxiesMass relation
2023
First Detection of an Overmassive Black Hole Galaxy UHZ1: Evidence for Heavy Black Hole Seed Formation from Direct Collapse
Natarajan P, Pacucci F, Ricarte A, Bogdán Á, Goulding A, Cappelluti N. First Detection of an Overmassive Black Hole Galaxy UHZ1: Evidence for Heavy Black Hole Seed Formation from Direct Collapse. The Astrophysical Journal Letters 2023, 960: l1. DOI: 10.3847/2041-8213/ad0e76.Peer-Reviewed Original ResearchSpectral energy distributionDirect collapseChandra X-ray sourcesTemplate spectral energy distributionsCompton-thick quasarsStellar mass estimatesSupermassive black holesX-ray fluxBlack hole seedsHigh-redshift objectsBlack hole massX-ray sourcesX-ray detectionExcellent agreementMultiwavelength propertiesBH seedsEddington rateBH massEarly universeBolometric luminosityHole massL bolPrior theoretical predictionsBig BangBlack holes
2022
The ngEHT’s Role in Measuring Supermassive Black Hole Spins
Ricarte A, Tiede P, Emami R, Tamar A, Natarajan P. The ngEHT’s Role in Measuring Supermassive Black Hole Spins. Galaxies 2022, 11: 6. DOI: 10.3390/galaxies11010006.Peer-Reviewed Original ResearchSupermassive black hole massSupermassive black holesBlack hole massSpin measurementsSupermassive black hole spinBlack holesEvent Horizon TelescopeEvent horizon scalesBlack hole spinHole spinCosmic timeTelescope ArrayHigh accretion ratesAccretion flowSpinCosmic AssemblyAccretion ratePre-existing samplesNew constraintsTelescopeHolesNew samplesConstraintsMeasurementsMultifrequencyExpectations for Horizon-Scale Supermassive Black Hole Population Studies with the ngEHT
Pesce D, Palumbo D, Ricarte A, Broderick A, Johnson M, Nagar N, Natarajan P, Gómez J. Expectations for Horizon-Scale Supermassive Black Hole Population Studies with the ngEHT. Galaxies 2022, 10: 109. DOI: 10.3390/galaxies10060109.Peer-Reviewed Original ResearchSupermassive black holesBlack hole massBlack holesEvent Horizon Telescope collaborationHole massEvent Horizon TelescopeBlack hole spinBlack hole shadowSMBH accretionEmission structurePrior theoretical studiesHole spinPhysical quantitiesSimple geometric modelPhysical parametersGeometric modelEntire skySource sizeTheoretical studyFlux densityHolesTelescopeSpinParametersEstimatesDwarf AGNs from variability for the origins of seeds (DAVOS): Intermediate-mass black hole demographics from optical synoptic surveys
Burke C, Shen Y, Liu X, Natarajan P, Caplar N, Bellovary J, Wang Z. Dwarf AGNs from variability for the origins of seeds (DAVOS): Intermediate-mass black hole demographics from optical synoptic surveys. Monthly Notices Of The Royal Astronomical Society 2022, 518: 1880-1904. DOI: 10.1093/mnras/stac2478.Peer-Reviewed Original ResearchActive galactic nucleiStellar massDwarf galaxiesIMBH massOptical variabilityRubin ObservatoryHost galaxy stellar massVariable active galactic nucleiHost stellar massGalaxy stellar massVera C. Rubin ObservatorySpectral energy distributionBlack hole massMock light curvesBlack hole demographicsGalactic nucleiMonte Carlo modelLuminosity functionHole massLight curvesRapid variabilitySurvey sensitivityEnergy distributionObservational constraintsMass range
2017
Conditions for Optimal Growth of Black Hole Seeds
Pacucci F, Natarajan P, Volonteri M, Cappelluti N, Urry C. Conditions for Optimal Growth of Black Hole Seeds. The Astrophysical Journal Letters 2017, 850: l42. DOI: 10.3847/2041-8213/aa9aea.Peer-Reviewed Original ResearchBlack holesBlack hole seedsSupermassive black holesBlack hole massCentral gas densityGravitational wave detectionParameter spaceLow-mass black holesHole massHost galaxiesInitial mass functionMass functionBolometric luminosityEddington accretionIsothermal profileWave detectionAccretion scenarioGas densityEnhanced probabilityInitial massQuasarsAccretion rate
2014
A large sample of Kohonen-selected SDSS quasars with weak emission lines: selection effects and statistical properties⋆
Meusinger H, Balafkan N. A large sample of Kohonen-selected SDSS quasars with weak emission lines: selection effects and statistical properties⋆. Astronomy & Astrophysics 2014, 568: a114. DOI: 10.1051/0004-6361/201423810.Peer-Reviewed Original ResearchWeak emission linesRadio-quiet quasarsSpectral energy distributionAccretion rateEmission linesEnergy distributionSloan Digital Sky Survey Data Release 7Radio-detected quasarsBlack hole massBroad line regionPower-law componentRedshift range zData Release 7Selection effectsBluer continuumEddington ratioHole massQuasar populationRadio quasarsRadio-loudQuasar activityRadio propertiesQuasar spectraRadio sourcesAccretion activity
2011
HOW IMPORTANT IS THE DARK MATTER HALO FOR BLACK HOLE GROWTH?
Volonteri M, Natarajan P, Gültekin K. HOW IMPORTANT IS THE DARK MATTER HALO FOR BLACK HOLE GROWTH? The Astrophysical Journal 2011, 737: 50. DOI: 10.1088/0004-637x/737/2/50.Peer-Reviewed Original ResearchDark matter haloesLow-mass galaxiesBlack hole growthLow-mass endCentral black holeBlack hole massMatter haloesBlack holesHole massHole growthDark matter halo massHost dark matter haloesLow-mass disk galaxiesHigh-mass black holesSupermassive black hole formationVelocity dispersion σBlack hole formationAngular momentum contentCentral SMBHGalaxies todayModel-independent analysisDisk galaxiesHalo massSMBH growthDispersion σ
2009
Is there an upper limit to black hole masses?
Natarajan P, Treister E. Is there an upper limit to black hole masses? Monthly Notices Of The Royal Astronomical Society 2009, 393: 838-845. DOI: 10.1111/j.1365-2966.2008.13864.x.Peer-Reviewed Original ResearchUltra-massive black holesBlack hole massBH mass functionMass functionHole massObserved X-ray luminosity functionX-ray luminosity functionLocal BH mass functionUpper limitCentral cluster galaxiesActive galactic nucleiBrightest central galaxiesMBH–σ relationHigh-mass endLocal mass functionHigh-mass tailCluster galaxiesBulge luminosityCentral galaxiesGalactic nucleiNearby UniverseSeed BHsStellar componentBH massHigh redshift
2007
The evolution of massive black hole seeds
Volonteri M, Lodato G, Natarajan P. The evolution of massive black hole seeds. Monthly Notices Of The Royal Astronomical Society 2007, 383: 1079-1088. DOI: 10.1111/j.1365-2966.2007.12589.x.Peer-Reviewed Original ResearchLow-mass galaxiesMassive black hole seedsBlack hole mass functionLow-mass endBlack hole seedsHigh redshiftBlack holesMass functionMassive seed black holesBlack hole occupation fractionNuclear black holeDark matter haloesLow surface brightnessMBH–σ relationRecent observational determinationsPresent observational constraintsSeed black holesBlack hole massFunction of redshiftBulgeless galaxiesMatter haloesVirgo clusterGas diskMass assemblyLuminosity function
2004
Modeling the Accretion History of Supermassive Black Holes
Natarajan P. Modeling the Accretion History of Supermassive Black Holes. Astrophysics And Space Science Library 2004, 308: 127-145. DOI: 10.1007/978-1-4020-2471-9_4.Peer-Reviewed Original ResearchSupermassive black holesBlack holesAccretion historyGrowth of SMBHsMost nearby galaxiesObservations of galaxiesX-ray wavebandsCold dark matterRemnant black holeBlack hole massLocal black holesStellar kinematicsLocal galaxiesDark matterNearby galaxiesLow redshiftCosmic timeHole massQuasar phenomenonMass estimatesGalaxiesSemi-analytic approachTheoretical modelingHolesStructure formation
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