2024
The NANOGrav 15 yr Data Set: Looking for Signs of Discreteness in the Gravitational-wave Background
Agazie G, Anumarlapudi A, Archibald A, Arzoumanian Z, Baier J, Baker P, Bécsy B, Blecha L, Brazier A, Brook P, Brown L, Burke-Spolaor S, Casey-Clyde J, Charisi M, Chatterjee S, Cohen T, Cordes J, Cornish N, Crawford F, Cromartie H, Crowter K, DeCesar M, Demorest P, Deng H, Dolch T, Ferrara E, Fiore W, Fonseca E, Freedman G, Garver-Daniels N, Gentile P, Glaser J, Good D, Gültekin K, Hazboun J, Jennings R, Johnson A, Jones M, Kaiser A, Kaplan D, Kelley L, Kerr M, Key J, Laal N, Lam M, Lamb W, Larsen B, Lazio T, Lewandowska N, Liu T, Lorimer D, Luo J, Lynch R, Ma C, Madison D, McEwen A, McKee J, McLaughlin M, McMann N, Meyers B, Meyers P, Mingarelli C, Mitridate A, Natarajan P, Ng C, Nice D, Ocker S, Olum K, Pennucci T, Perera B, Pol N, Radovan H, Ransom S, Ray P, Romano J, Runnoe J, Sardesai S, Schmiedekamp A, Schmiedekamp C, Schmitz K, Shapiro-Albert B, Siemens X, Simon J, Siwek M, Fiscella S, Stairs I, Stinebring D, Stovall K, Susobhanan A, Swiggum J, Taylor S, Turner J, Unal C, Vallisneri M, Vigeland S, Wahl H, Willson L, Witt C, Wright D, Young O. The NANOGrav 15 yr Data Set: Looking for Signs of Discreteness in the Gravitational-wave Background. The Astrophysical Journal 2024, 978: 31. DOI: 10.3847/1538-4357/ad93d5.Peer-Reviewed Original ResearchSupermassive black hole binariesGravitational wave backgroundPulsar timing arraysIndividual supermassive black hole binaryGravitational wave background amplitudeNorth American Nanohertz ObservatoryBlack hole binariesGravitational-wave backgroundStrain spectrumContinuous GWsEarly universeGravitational-waveGravitational wavesTiming arraysWave backgroundNANOGravPower lawSpectraResidual spectrumGWDiscrete naturePulsarObservatoryBinariesRealizationDetecting Population III Stars through Tidal Disruption Events in the Era of JWST and Roman
Chowdhury R, Chang J, Dai L, Natarajan P. Detecting Population III Stars through Tidal Disruption Events in the Era of JWST and Roman. The Astrophysical Journal Letters 2024, 966: l33. DOI: 10.3847/2041-8213/ad41b7.Peer-Reviewed Original ResearchTidal disruption eventsPop III starsIII starsEarly universeNancy Grace Roman Space TelescopeBlack hole mass functionEra of JWSTMass fallback rateMetal-free starsMassive black holesPopulation III starsRoman Space TelescopeDisruptive eventsPristine gasSpace TelescopeBlack holeStar formationEvolution timescalesFallback ratePopulation IIIFlare emissionHeavy elementsMass functionStarsLocal UniverseOvermassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift Universe
Mezcua M, Pacucci F, Suh H, Siudek M, Natarajan P. Overmassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift Universe. The Astrophysical Journal Letters 2024, 966: l30. DOI: 10.3847/2041-8213/ad3c2a.Peer-Reviewed Original ResearchJames Webb Space TelescopeSupermassive black holesBlack holeCosmic noonCoevolution of supermassive black holesHigh-redshift UniverseHigh-z sourcesLow-mass galaxiesStar formation historyOvermassive black holesPresent-day UniverseGalactic nucleiEarly universeHost galaxiesSpace TelescopeActive galaxiesCosmic timeRedshift rangeStellar contentHigh-zFormation historyGalaxiesLocal relationsHolesTelescopeAn Enhanced Massive Black Hole Occupation Fraction Predicted in Cluster Dwarf Galaxies
Tremmel M, Ricarte A, Natarajan P, Bellovary J, Sharma R, Quinn T. An Enhanced Massive Black Hole Occupation Fraction Predicted in Cluster Dwarf Galaxies. The Open Journal Of Astrophysics 2024, 7 DOI: 10.33232/001c.116617.Peer-Reviewed Original ResearchMassive black holesLow-mass galaxiesBlack hole occupation fractionDwarf galaxiesMass galaxiesOccupation fractionBlack holeCosmological simulationsCluster environmentPopulation of massive black holesFunction of galaxy stellar massLow-mass black holesMassive black hole formationSeed massive black holeHost massive black holesMass black holesNuclear star clusterGalaxy stellar massCluster dwarf galaxiesMass assembly historyLocal gas propertiesStellar massEarly universeStar clustersCluster dwarfs
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 two z ∼ 13 galaxy candidates HD1 and HD2 are likely not lensed
Lee R, Pacucci F, Natarajan P, Loeb A. The two z ∼ 13 galaxy candidates HD1 and HD2 are likely not lensed. Monthly Notices Of The Royal Astronomical Society 2022, 519: 585-593. DOI: 10.1093/mnras/stac3605.Peer-Reviewed Original ResearchHubble Space TelescopeSupermassive black holesGalaxy candidatesStar formationHST imagingLensing hypothesisForeground galaxiesSpace TelescopeSpherical deflectorLensing galaxyEarly universeGravitational lensingDeep imagingBlack holesGalaxiesJWSTLuminosityHigh magnificationTelescopeLensingUniverseDeflectorUltravioletHolesMagnitudeSnowmass2021 theory frontier white paper: Astrophysical and cosmological probes of dark matter
Boddy K, Lisanti M, McDermott S, Rodd N, Weniger C, Ali-Haïmoud Y, Buschmann M, Cholis I, Croon D, Erickcek A, Gluscevic V, Leane R, Mishra-Sharma S, Muñoz J, Nadler E, Natarajan P, Price-Whelan A, Vegetti S, Witte S. Snowmass2021 theory frontier white paper: Astrophysical and cosmological probes of dark matter. Journal Of High Energy Astrophysics 2022, 35: 112-138. DOI: 10.1016/j.jheap.2022.06.005.Peer-Reviewed Original ResearchDark matterCosmological probesDark matter discoveryEffective field theoryEarly universeNew observablesCosmological domainField theoryStatistical inferenceSignificant open questionsConsistent pictureTheoretical techniquesGeneral propertiesTheoretical challengesGalaxiesAstrophysicsFundamental natureStarsTheoretical foundationUniversePhysicsObservablesProbeMatterOpen question
2019
Titans of the early Universe: The Prato statement on the origin of the first supermassive black holes
Woods T, Agarwal B, Bromm V, Bunker A, Chen K, Chon S, Ferrara A, Glover S, Haemmerlé L, Haiman Z, Hartwig T, Heger A, Hirano S, Hosokawa T, Inayoshi K, Klessen R, Kobayashi C, Koliopanos F, Latif M, Li Y, Mayer L, Mezcua M, Natarajan P, Pacucci F, Rees M, Regan J, Sakurai Y, Salvadori S, Schneider R, Surace M, Tanaka T, Whalen D, Yoshida N. Titans of the early Universe: The Prato statement on the origin of the first supermassive black holes. Publications Of The Astronomical Society Of Australia 2019, 36: e027. DOI: 10.1017/pasa.2019.14.Peer-Reviewed Original ResearchFirst supermassive black holesSupermassive black holesBlack holesEarly universeNext-generation observatoryMassive quasarsSupermassive starsMassive seedsProgenitor modelsFormation scenarioSuch objectsUniverseTheoretical understandingTheoretical evidenceQuasarsHolesStarsObservatoryPresent understanding
2015
Hubble Frontier Fields: a high-precision strong-lensing analysis of the massive galaxy cluster Abell 2744 using ∼180 multiple images
Jauzac M, Richard J, Jullo E, Clément B, Limousin M, Kneib J, Ebeling H, Natarajan P, Rodney S, Atek H, Massey R, Eckert D, Egami E, Rexroth M. Hubble Frontier Fields: a high-precision strong-lensing analysis of the massive galaxy cluster Abell 2744 using ∼180 multiple images. Monthly Notices Of The Royal Astronomical Society 2015, 452: 1437-1446. DOI: 10.1093/mnras/stv1402.Peer-Reviewed Original ResearchGalaxy cluster Abell 2744Gravitational lensing analysisAbell 2744Cluster-scale dark matter haloesHigh-precision mass measurementsGalaxy-scale haloesMultiply imaged galaxiesMassive galaxy clustersStrong-lensing analysisDark matter haloesMass modelCent level precisionKpc apertureMatter haloesAdvanced CameraGalaxy clustersEarly universeLensing analysisMagnification mapsCluster coreCluster membersFrontier fieldPrevious erroneous identificationMass measurementsLevel precision
2013
NEW OBSERVATIONAL CONSTRAINTS ON THE GROWTH OF THE FIRST SUPERMASSIVE BLACK HOLES
Treister E, Schawinski K, Volonteri M, Natarajan P. NEW OBSERVATIONAL CONSTRAINTS ON THE GROWTH OF THE FIRST SUPERMASSIVE BLACK HOLES. The Astrophysical Journal 2013, 778: 130. DOI: 10.1088/0004-637x/778/2/130.Peer-Reviewed Original ResearchBlack hole growthHole growthBlack holesDeep Hubble Space Telescope imagesTotal black hole growthChandra Deep Field SouthHubble Space Telescope imagesDeep Field SouthSupermassive black holesActive black holesSpace Telescope imagesBlack hole mergersX-ray emissionMass densityNew observational constraintsGalaxy candidatesLuminous galaxiesGalaxy sampleMass assemblyEarly universeHole mergersTelescope imagesEarly epochsInteresting constraintsObservational constraints
2012
STAR FORMATION IN THE EARLY UNIVERSE: BEYOND THE TIP OF THE ICEBERG
Tanvir N, Levan A, Fruchter A, Fynbo J, Hjorth J, Wiersema K, Bremer M, Rhoads J, Jakobsson P, O'Brien P, Stanway E, Bersier D, Natarajan P, Greiner J, Watson D, Castro-Tirado A, Wijers R, Starling R, Misra K, Graham J, Kouveliotou C. STAR FORMATION IN THE EARLY UNIVERSE: BEYOND THE TIP OF THE ICEBERG. The Astrophysical Journal 2012, 754: 46. DOI: 10.1088/0004-637x/754/1/46.Peer-Reviewed Original ResearchStar formation rateGalaxy luminosity functionGamma-ray burstsLuminosity functionStar formationEarly universeMean star formation rateHubble Space Telescope imagingHubble Ultra Deep FieldSteep faint-end slopeSwift gamma-ray burstsUltra Deep FieldFaint-end slopeDeep field observationsRespective redshiftsGRB 090423Telescope imagingHost galaxiesUV luminosityGRB positionsCharacteristic luminosityDeep FieldGRB rateDeep observationsGRB production
2011
Black hole growth in the early Universe is self-regulated and largely hidden from view
Treister E, Schawinski K, Volonteri M, Natarajan P, Gawiser E. Black hole growth in the early Universe is self-regulated and largely hidden from view. Nature 2011, 474: 356-358. PMID: 21677753, DOI: 10.1038/nature10103.Peer-Reviewed Original Research
2002
First Stars, Very Massive Black Holes, and Metals
Schneider R, Ferrara A, Natarajan P, Omukai K. First Stars, Very Massive Black Holes, and Metals. The Astrophysical Journal 2002, 571: 30. DOI: 10.1086/339917.Peer-Reviewed Original ResearchInitial mass functionSupermassive black holesFirst starsGalactic nucleiBlack holesPrimordial initial mass functionFirst heavy elementsDark matter candidateStar formation modeFirst massive starsPopulation III starsMassive black holesMatter candidatePrimordial starsStar formationPossible redshiftsMassive starsEarly universeRedshift zBaryonic haloHeavy elementsCosmological contextNegligible fractionMass functionInitial stars
1994
Dynamical chaos in SU(2)⊗U(1) theory
Berman G, Bulgakov E, Holm D, Kluger Y. Dynamical chaos in SU(2)⊗U(1) theory. Physics Letters A 1994, 194: 251-264. DOI: 10.1016/0375-9601(94)91247-5.Peer-Reviewed Original ResearchTime correlation functionsGeV/fm3Correlation functionsChaotic regimeFrequency spectrumEarly universeRegular regimeDynamical chaosEnergy densityFrequency linesBroken phaseObservable effectChaotic dynamicsSpectraYang-Mills fieldsRegimeGauge theoryTransitionUniverseDensityFm3DynamicsYang-MillsTheoryField
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