Mass and Magnetic distributions in Self Gravitating Super Alfvenic Turbulence with AMR

Abstract

In this work, we present the mass and magnetic distributions found in a recent Adaptive Mesh Refinement (AMR) MHD simulation of supersonic, \sa, self gravitating turbulence. Powerlaw tails are found in both volume density and magnetic field probability density functions, with $P(\rho )\propto {\rho }^{-1.67}$ and $P(B)\propto B^{-2.74}$. A power law is also found between magnetic field strength and density, with $B\propto {\rho }^{0.48}$, throughout the collapsing gas. The mass distribution of gravitationally bound cores is shown to be in excellent agreement with recent observation of prestellar cores. The mass to flux distribution of cores is also found to be in excellent agreement with recent Zeeman splitting measurements.

9 pages, 10 figures (3 color). Submitted to the Astrophysical Journal

References in corpus (19)

• A Multi-Code Analysis Toolkit for Astrophysical Simulation Data
• The Statistics of Supersonic Isothermal Turbulence
• The Density Probability Distribution in Compressible Isothermal Turbulence: Solenoidal versus Compressive Forcing
• A High Order Godunov Scheme with Constrained Transport and Adaptive Mesh Refinement for Astrophysical MHD
• The Mass Distribution and Lifetime of Prestellar Cores in Perseus, Serpens, and Ophiuchus
• On the Density Distribution in Star-forming Interstellar Clouds
• Bolocam Survey for 1.1 mm Dust Continuum Emission in the c2d Legacy Clouds. II. Ophiuchus
• Magnetic Fields in Dark Cloud Cores: Arecibo OH Zeeman Observations
• An Ammonia Spectral Atlas of Dense Cores in Perseus
• Magnetically Regulated Star Formation in 3D: The Case of Taurus Molecular Cloud Complex
• Comparing Star Formation on Large Scales in the c2d Legacy Clouds: Bolocam 1.1 mm Dust Continuum Surveys of Serpens, Perseus, and Ophiuchus
• The effect of magnetic fields on star cluster formation
• Dense core formation in supersonic turbulent converging flows
• Density Probability Distribution Functions in Supersonic Hydrodynamic and MHD Turbulence
• The Nature of the Velocity Field in Molecular Clouds. I. The Non-Magnetic Case
• Sub-Alfvenic Non-Ideal MHD Turbulence Simulations with Ambipolar Diffusion: II. Comparison with Observation, Clump Properties, and Scaling to Physical Units
• Turbulent Mixing in the Interstellar Medium -- an application for Lagrangian Tracer Particles
• Simulating Supersonic Turbulence in Magnetized Molecular Clouds
• Density-PDFs and Lagrangian Statistics of highly compressible Turbulence

Cited by in corpus (44)

• Enzo: An Adaptive Mesh Refinement Code for Astrophysics
• The Star Formation Rate of Turbulent Magnetized Clouds: Comparing Theory, Simulations, and Observations
• On the Density Distribution in Star-forming Interstellar Clouds
• On the evolution of the density pdf in strongly self-gravitating systems
• Unfolding the Laws of Star Formation: The Density Distribution of Molecular Clouds
• The Two States of Star Forming Clouds
• Comparing Numerical Methods for Isothermal Magnetized Supersonic Turbulence
• Moving mesh simulations of star forming cores in magneto-gravo-turbulence
• Star Formation in the First Galaxies I: Collapse Delayed by Lyman-Werner Radiation
• Accuracy of core mass estimates in simulated observations of dust emission
• Magnetized Interstellar Molecular Clouds. I. Comparison Between Simulations and Zeeman Observations
• From parallel to perpendicular -- On the orientation of magnetic fields in molecular clouds
• On column density thresholds and the star formation rate
• The Razor's Edge of Collapse: The Transition Point from Lognormal to Powerlaw in Molecular Cloud PDFs
• Core and filament formation in magnetized, self-gravitating isothermal layers
• A Stable, Accurate Methodology for High Mach Number, Strong Magnetic Field MHD Turbulence with Adaptive Mesh Refinement: Resolution and Refinement Studies
• Collapse in Self-gravitating Turbulent Fluids
• Supernova Driving. II. Compressive Ratio in Molecular-Cloud Turbulence
• The Probability Distribution of Density Fluctuations in Supersonic Turbulence
• The Distribution of Mass Surface Densities in a High-Mass Protocluster
• The density structure of supersonic self-gravitating turbulence
• Atomic Chemistry In Turbulent Astrophysical Media I: Effect of Atomic Cooling
• Gravity Versus Magnetic Fields in Forming Molecular Clouds
• Atomic Chemistry in Turbulent Astrophysical Media II: Effect of the Redshift Zero Metagalactic Background
• Constructing multi-scale gravitational energy spectra from molecular cloud surface density PDF -- Interplay between turbulence and gravity
• Estimation of high-resolution dust column density maps. Comparison of modified black-body fits and radiative transfer modelling
• Detailed Balance and Exact Results for Density Fluctuations in Supersonic Turbulence
• The impact of magnetic fields on the chemical evolution of the supernova-driven ISM
• Orbital Migration of Protoplanets in a Marginally Gravitationally Unstable Disk. II. Migration, Merging, and Ejection
• Collapse and Fragmentation of Magnetic Molecular Cloud Cores with the Enzo AMR MHD Code. II. Prolate and Oblate Cores
• Tracing the general structure of Galactic molecular clouds using Planck data: I. The Perseus region as a test case
• Core Emergence in a Massive Infrared Dark Cloud: A Comparison Between Mid-IR Extinction and 1.3 mm Emission
• Time evolution of the galactic $B-\rho$ relation: the impact of the magnetic field morphology
• A two-phase model of galaxy formation: III. The formation of globular clusters
• The Magnetic Field versus Density relation in Star-Forming Molecular Clouds
• Finite shock model of density in supersonic turbulence
• Reconstructing the genesis of a globular cluster system at a look-back time of 9.1 Gyr with the JWST
• High-Performance Astrophysical Simulations and Analysis with Python
• The Density-Magnetic Field Relation in the Atomic ISM
• Comparison of Low-Mass and High-Mass Star Formation
• Historical perspective on astrophysical MHD simulations
• CO mapping of Cygnus-X -- volume density distribution
• Statistical mass function of prestellar cores from the density distribution of their natal clouds
• From Interstellar Clouds to Stars