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
Dwarf 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
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
2006
GRB 050814 at z = 5.3 and the Redshift Distribution of Swift GRBs
Jakobsson P, Levan A, Fynbo J, Priddey R, Hjorth J, Tanvir N, Watson D, Jensen B, Sollerman J, Natarajan P, Gorosabel J, Cerón J, Pedersen K. GRB 050814 at z = 5.3 and the Redshift Distribution of Swift GRBs. AIP Conference Proceedings 2006, 836: 552-557. DOI: 10.1063/1.2207953.Peer-Reviewed Original ResearchRedshift distributionMean redshiftSwift GRBsGRB 050814Red optical coloursStar formation rateX-ray observationsGRB redshift distributionHigh mean redshiftSpectral energy distributionWide redshift rangeHigh redshift burstsOptical colorsGRB rateIntergalactic mediumRedshift rangeEnergy distributionGRB sampleGRBsFormation rateRedshiftEfficient probeUniverseSignificant fractionGalaxiesA mean redshift of 2.8 for Swift gamma-ray bursts
Jakobsson P, Levan A, Fynbo J, Priddey R, Hjorth J, Tanvir N, Watson D, Jensen B, Sollerman J, Natarajan P, Gorosabel J, Cerón J, Pedersen K, Pursimo T, Árnadóttir A, Castro-Tirado A, Davis C, Deeg H, Fiuza D, Mykolaitis S, Sousa S. A mean redshift of 2.8 for Swift gamma-ray bursts. Astronomy & Astrophysics 2006, 447: 897-903. DOI: 10.1051/0004-6361:20054287.Peer-Reviewed Original ResearchGamma-ray burstsSwift gamma-ray burstsMean redshiftRed optical coloursStar formation rateHigh-redshift UniverseX-ray observationsHigh mean redshiftSpectral energy distributionWide redshift rangeHigh redshift burstsStar formationOptical colorsGRB rateIntergalactic mediumRedshift distributionRedshift rangeHigh luminosityEnergy distributionGRB 050814RedshiftAfterglowUniverseFormation rateEfficient probe
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