2025
Dynamics of Low-mass Black Hole Seeds in the BRAHMA Simulations Using Subgrid Dynamical Friction: Impact on Merger-driven Black Hole Growth in the High-redshift Universe
Bhowmick A, Blecha L, Kelley L, Sivasankaran A, Torrey P, Weinberger R, Chen N, Vogelsberger M, Hernquist L, Natarajan P, Di Matteo T. Dynamics of Low-mass Black Hole Seeds in the BRAHMA Simulations Using Subgrid Dynamical Friction: Impact on Merger-driven Black Hole Growth in the High-redshift Universe. The Astrophysical Journal 2025, 991: 81. DOI: 10.3847/1538-4357/adf96b.Peer-Reviewed Original ResearchMerger rateDynamical frictionHigher redshiftsVelocity offsetHalo centerLaser Interferometer Space AntennaBH merger rateBlack hole seedsHigh-redshift UniverseBlack hole growthCosmological hydrodynamical simulationsBH growthGas accretionGravitational wavesHalo massHost haloMerger timescaleGas massHydrodynamic simulationsSpace AntennaHole growthHost subhaloesHaloSeed modelBHSignatures of black hole seeding in the local Universe: predictions from the BRAHMA cosmological simulations
Bhowmick A, Blecha L, Torrey P, Somerville R, Kelley L, Weinberger R, Vogelsberger M, Hernquist L, Natarajan P, Kho J, Di Matteo T. Signatures of black hole seeding in the local Universe: predictions from the BRAHMA cosmological simulations. Monthly Notices Of The Royal Astronomical Society 2025, 538: 518-536. DOI: 10.1093/mnras/staf269.Peer-Reviewed Original ResearchBlack holeDwarf galaxiesSeed modelLocal UniverseBlack hole seedsLow-redshift constraintsSupermassive black holesLocalized black holesLyman–Werner radiationGas accretionRedshift constraintsAccretion physicsCosmological simulationsBH populationMerger dynamicsOccupation fractionGalaxiesDwarfAccretionMergerMass seedsSpinSignaturePhysicsHoles
2023
Bridging Scales in Black Hole Accretion and Feedback: Magnetized Bondi Accretion in 3D GRMHD
Cho H, Prather B, Narayan R, Natarajan P, Su K, Ricarte A, Chatterjee K. Bridging Scales in Black Hole Accretion and Feedback: Magnetized Bondi Accretion in 3D GRMHD. The Astrophysical Journal Letters 2023, 959: l22. DOI: 10.3847/2041-8213/ad1048.Peer-Reviewed Original ResearchSupermassive black holesStrong magnetic fieldMagnetic fieldBondi rateAccretion rateOrders of magnitudeBlack hole accretionMagnetic field reconnectionLow accretion ratesEnergy feedbackHost galaxiesSMBH massGas accretionField reconnectionBondi accretionBondi problemBondi radiusHorizon scaleBlack holesDensity profilesEnergy transportAccretionTurbulent convectionExternal mediumDisparate scales
2020
A new channel to form IMBHs throughout cosmic time
Natarajan P. A new channel to form IMBHs throughout cosmic time. Monthly Notices Of The Royal Astronomical Society 2020, 501: 1413-1425. DOI: 10.1093/mnras/staa3724.Peer-Reviewed Original ResearchNuclear star clustersBlack holesCosmic timeLow-mass dwarf galaxiesFormation of BHsFirst black holesLow-mass dwarfsCenter black holeTidal disruption eventsZero-angular momentumIMBH formationMassive galaxiesDwarf galaxiesCosmic epochsGas accretionHigh redshiftStar clustersBH formationBH massHole rangeDisruption eventsAngular momentumFinal massMass gapWave coalescence
2007
The mass function of high-redshift seed black holes
Lodato G, Natarajan P. The mass function of high-redshift seed black holes. Monthly Notices Of The Royal Astronomical Society: Letters 2007, 377: l64-l68. DOI: 10.1111/j.1745-3933.2007.00304.x.Peer-Reviewed Original ResearchSeed black holesSupermassive black holesBlack holesMass functionUltra-luminous X-ray sourcesCold dark matter cosmogonySignificant mass concentrationsX-ray sourcesMass distributionGas-rich environmentsGalaxy halosNearby galaxiesSolar massesGas accretionHigh redshiftRedshift zHalo propertiesDisk accretionBright quasarsFrequent mergersHigh massInner regionCentral massHolesSeed mass distribution
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