Massive Outflows Driven by Magnetic Effects in Star Forming Clouds with High Mass Accretion Rates

Abstract

The relation between the mass accretion rate onto the circumstellar disc and the rate of mass ejection by magnetically driven winds is investigated using three-dimensional magnetohydrodynamics simulations. Using a spherical cloud core with a varying ratio of thermal to gravitational energy, which determines the mass accretion rate onto the disc, to define the initial conditions, the outflow propagation for approximately 10^4 yr after protostar formation is then calculated for several cloud cores. The mass ejection rate and accretion rate are comparable only when the magnetic energy of the initial cloud core is comparable to the gravitational energy. Consequently, in strongly magnetised clouds a higher mass accretion rate naturally produces both massive protostars and massive outflows. The simulated outflow mass, momentum, kinetic energy and momentum flux agree well with observations, indicating that massive stars form through the same mechanism as low-mass stars but require a significantly strong magnetic field to launch massive outflows.

52 pages, 18 figures, accepted for publication by MNRAS

References in corpus (25)

• Cold Dark Clouds: The Initial Conditions for Star Formation
• Radiation-Hydrodynamic Simulations of Collapse and Fragmentation in Massive Protostellar Cores
• The Burst Mode of Protostellar Accretion
• Magnetic processes in a collapsing dense core. I Accretion and Ejection
• Circumventing the radiation pressure barrier in the formation of massive stars via disk accretion
• Bolocam Survey for 1.1 mm Dust Continuum Emission in the c2d Legacy Clouds. II. Ophiuchus
• A SCUBA survey of Orion, the low-mass end of the core mass function
• Magnetic Fields and Massive Star Formation
• Variable protostellar accretion with episodic bursts
• Radiation Magnetohydrodynamic Simulations of Protostellar Collapse: Non-Ideal Magnetohydrodynamic Effects and Early Formation of Circumstellar Disks
• The Fragmentation of Magnetized, Massive Star-Forming Cores with Radiative Feedback
• Magnetic Fields and Rotations of Protostars
• Effects of Ohmic and ambipolar diffusion on the formation and evolution of the first cores, protostars and circumstellar discs
• Grand Design Spiral Arms in A Young Forming Circumstellar Disk
• Exposed Long-lifetime First-core: A New Model of First Cores Based on Radiation Hydrodynamics
• Protostellar Outflows and Radiative Feedback from Massive Stars. II. Feedback, Star Formation Efficiency, and Outflow Broadening
• Protostellar Outflows and Radiative Feedback from Massive Stars
• Protostellar Jets Enclosed by Low-velocity Outflows
• Methanol Maser Associated Outflows: Detection statistics and properties
• Alfvenic Turbulence Beyond the Ambipolar Diffusion Scale
• Accretion Phase of Star Formation in Clouds with Different Metallicities
• Formation and Early Evolution of Circumstellar Disks in Turbulent Molecular Cloud Cores
• The dependence of protostar formation on the geometry and strength of the initial magnetic field
• 6.7GHz Methanol Maser Associated Outflows: An evolutionary sequence
• Are molecular outflows around high-mass stars driven by ionization feedback?

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• First hydrodynamics simulations of radiation forces and photoionization feedback in massive star formation
• Formation and Evolution of Disks around Young Stellar Objects
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• Massive outflows associated with ATLASGAL clumps
• Jets and outflows of massive protostars - From cloud collapse to jet launching and cloud dispersal
• The Effect of Misalignment between Rotation Axis and Magnetic Field on Circumstellar Disk
• The Origin of the Stellar Mass Distribution and Multiplicity
• An Ordered Envelope-disk Transition in the Massive Protostellar Source G339.88-1.26
• Does misalignment between magnetic field and angular momentum enhance or suppress circumstellar disk formation?
• Salt, Hot Water, and Silicon Compounds Tracing Massive Twin Disks
• The impact of non-ideal magnetohydrodynamic processes on discs, outflows, counter-rotation and magnetic walls during the early stages of star formation
• The first bird's-eye view of a gravitationally unstable accretion disk in high-mass star formation
• Massive Outflows Driven by Magnetic Effects II: Comparison with Observations
• Collapse of turbulent massive cores with ambipolar diffusion and hybrid radiative transfer II. Outflows
• Failed and delayed protostellar outflows with high mass accretion rates
• The Impact of Feedback in Massive Star Formation. II. Lower Star Formation Efficiency at Lower Metallicity
• Formation of massive stars under protostellar radiation feedback: Very metal-poor stars
• Modeling disks and magnetic outflows around a forming massive star: I. Investigating the two layer-structure of the accretion disk
• Magnetohydrodynamic effect on first star formation: prestellar core collapse and protostar formation
• Crescent-Shaped Molecular Outflow from the Intermediate-mass Protostar DK Cha Revealed by ALMA
• Modeling disks and magnetic outflows around a forming massive star: II. Dynamics of jets from massive protostars
• Discovery of a Photoionized Bipolar Outflow towards the Massive Protostar G45.47+0.05
• An ALMA study of the massive molecular clump N159W-North in the Large Magellanic Cloud: A possible gas flow penetrating one of the most massive protocluster systems in the Local Group
• Non-ideal magnetohydrodynamics on a moving mesh
• Twin Jets and Close Binary Formation
• Non-ideal magnetohydrodynamic simulations of the first star formation: the effect of ambipolar diffusion
• Disk wind feedback from high-mass protostars
• EVN observations of 6.7 GHz methanol maser polarization in massive star-forming regions IV. Magnetic field strength limits and structure for 7 additional sources
• The SOMA Radio Survey. I. Comprehensive SEDs Of High-Mass Protostars From Infrared To Radio And The Emergence Of Ionization Feedback
• The First Detection of a Protostellar CO Outflow in the Small Magellanic Cloud with ALMA
• ALMA-IMF XVII -- Census and lifetime of high-mass prestellar cores in 14 massive protoclusters
• Outflow-Confined HII regions. II. The Early Break-Out Phase
• Core Emergence in a Massive Infrared Dark Cloud: A Comparison Between Mid-IR Extinction and 1.3 mm Emission
• Structure of the Source I disk in Orion-KL
• Impact of Magnetic Braking on High-mass Close Binary Formation
• EVN observations of 6.7 GHz methanol maser polarization in massive star-forming regions. V. Completion of the flux-limited sample
• Driving Conditions of Protostellar Outflows in Different Star-Forming Environments
• WISE Discovery of Mid-infrared Variability in Massive Young Stellar Objects
• The magnetic field of a magnetohydrodynamic disk wind: Water maser observations and simulations
• Revealing a Centrally Condensed Structure in OMC-3/MMS 3 with ALMA High Resolution Observations
• Can High-velocity Protostellar Jets Help to Drive Low-velocity Outflow?
• Environmental Effects of Star-Forming Cores on Mass Accretion Rate
• Synthetic Polarization Maps of an Outflow Zone from Magnetohydrodynamic Simulations
• Discs and outflows in the early phases of massive star formation: influence of magnetic fields and ambipolar diffusion