Rotating filament in Orion B: Do cores inherit their angular momentum from their parent filament?

Abstract

Angular momentum is one of the most important physical quantities that govern star formation. The initial angular momentum of a core may be responsible for its fragmentation and can have an influence on the size of the protoplanetary disk. To understand how cores obtain their initial angular momentum, it is important to study the angular momentum of filaments where they form. While theoretical studies on filament rotation have been explored, there exist very few observational measurements of the specific angular momentum in star-forming filaments. We present high-resolution N2D+ ALMA observations of the LBS 23 (HH24-HH26) region in Orion B, which provide one of the most reliable measurements of the specific angular momentum in a star-forming filament. We find the total specific angular momentum ($4\times 10^{20}c{m}^2{s}^{-1}$), the dependence of the specific angular momentum with radius (j(r) $\propto r^{1.83}$), and the ratio of rotational energy to gravitational energy (${\beta }_{rot}\sim 0.04$) comparable to those observed in rotating cores with sizes similar to our filament width ($\sim$ 0.04 pc) in other star-forming regions. Our filament angular momentum profile is consistent with rotation acquired from ambient turbulence and with simulations that show cores and their host filaments develop simultaneously due to the multi-scale growth of nonlinear perturbation generated by turbulence.

arXiv commentaccepted by ApJ, 2020.12.1

References in corpus (86)

• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models
• Characterizing interstellar filaments with Herschel in IC5146
• Dense Cores in Dark Clouds. XIV. N2H+(1-0) maps of dense cloud cores
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• The Energy Dissipation Rate of Supersonic, Magnetohydrodynamic Turbulence in Molecular Clouds
• The Spitzer Space Telescope Survey of the Orion A & B Molecular Clouds - Part I: A Census of Dusty Young Stellar Objects and a Study of their Mid-IR Variability
• Tracing Magnetic Fields with Aligned Grains
• Molecular ions in L1544. II. The ionization degree
• The Physics of Star Formation
• On the diversity and statistical properties of protostellar discs
• Helical Fields and Filamentary Molecular Clouds
• What is the Total Deuterium Abundance in the Local Galactic Disk?
• The VLA Nascent Disk and Multiplicity Survey of Perseus Protostars (VANDAM). II. Multiplicity of Protostars in the Perseus Molecular Cloud
• SCUBA Polarization Measurements of the Magnetic Field Strengths in the L183, L1544, and L43 Prestellar Cores
• An ALMA study of the Orion Integral Filament: I. Evidence for narrow fibers in a massive cloud
• From Filamentary Networks to Dense Cores in Molecular Clouds: Toward a New Paradigm for Star Formation
• The Herschel Orion Protostar Survey: Spectral Energy Distributions and Fits Using a Grid of Protostellar Models
• Characterizing the properties of nearby molecular filaments observed with Herschel
• Direct observation of a sharp transition to coherence in Dense Cores
• Herschel-Planck dust optical-depth and column-density maps: I. Method description and results for Orion
• On the universality of interstellar filaments: theory meets simulations and observations
• Nonideal MHD Effects and Magnetic Braking Catastrophe in Protostellar Disk Formation
• On the nature of star-forming filaments: I. Filament morphologies
• Magnetic Field Diagnostics Based on Far-Infrared Polarimetry: Tests Using Numerical Simulations
• Filaments in Simulations of Molecular Cloud Formation
• Theoretical Models of Polarized Dust Emission from Protostellar Cores
• Molecular line study of the very young protostar IRAM 04191 in Taurus: Infall, rotation, and outflow
• Chains of dense cores in the Taurus L1495/B213 complex
• SMA Observations of Class 0 Protostars: A High-Angular Resolution Survey of Protostellar Binary Systems
• Depletion and low gas temperature in the L183 prestellar core : the N2H+ - N2D+ tool
• Turbulent Molecular Cloud Cores: Rotational Properties
• On the nature of star-forming filaments: II. Sub-filaments and velocities
• On the frequency of N2H+ and N2D+
• Can Nonlinear Hydromagnetic Waves Support a Self-Gravitating Cloud?
• A Bubbling Nearby Molecular Cloud: COMPLETE Shells in Perseus
• Fibers in the NGC1333 proto-cluster
• Formation of Magnetized Prestellar Cores with Ambipolar Diffusion and Turbulence
• CARMA Large Area Star Formation Survey: Observational Analysis of Filaments in the Serpens South Molecular Cloud
• Driven and Decaying Turbulence Simulations of Low-Mass Star Formation: From Clumps to Cores to Protostars
• Dense core formation in supersonic turbulent converging flows
• Collapse of a molecular cloud core to stellar densities: the formation and evolution of pre-stellar discs
• Complex, Quiescent Kinematics in a Highly Filamentary Infrared Dark Cloud
• Complex Structure in Class 0 Protostellar Envelopes III: Velocity Gradients in Non-Axisymmetric Envelopes, Infall or Rotation?
• The JCMT Legacy Survey of the Gould Belt: a first look at Orion B with HARP
• Aspect Ratio Dependence of the Free-Fall Time for Non-Spherical Symmetries
• Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South
• The Deuterium Fractionation Timescale in Dense Cloud Cores: A Parameter Space Exploration
• Gravitational fragmentation caught in the act: the filamentary Musca molecular cloud
• OVRO N2H+ Observations of Class 0 Protostars: Constraints on the Formation of Binary Stars
• The Angular Momentum of Magnetized Molecular Cloud Cores: A 2D-3D Comparison
• No Keplerian Disk >10 AU around the Protostar B335: Magnetic Braking or Young Age?
• Filament Fragmentation in High-Mass Star Formation
• High sensitivity maps of molecular ions in L1544: I. Deuteration of N2H+ and HCO+ and first evidence of N2D+ depletion
• Anisotropic Formation of Magnetized Cores in Turbulent Clouds
• The CARMA-NRO Orion Survey: The filamentary structure as seen in C${}^{18}$O emission
• Morphology and Kinematics of Filaments in the Serpens and Perseus Molecular Clouds
• Resolved Depletion Zones and Spatial Differentiation of N2H+ and N2D+
• Angular momentum profiles of Class 0 protostellar envelopes
• A Hunt for Massive Starless Cores
• Core and filament formation in magnetized, self-gravitating isothermal layers
• Protostellar Angular Momentum Evolution during Gravoturbulent Fragmentation
• Self-gravitating Filament Formation from Shocked Flows: Velocity Gradients across Filaments
• Observation of rotation in star forming regions: clouds, cores, disks, and jets
• Prestellar Core Formation, Evolution, and Accretion from Gravitational Fragmentation in Turbulent Converging Flows
• Magnetic fields in the massive dense cores of DR21 filament: weakly magnetized cores in a strongly magnetized filament
• Angular Momentum of the N2H+ Cores in the Orion A Cloud
• Formation of the Hub-Filament System G33.92+0.11: Local Interplay between Gravity, Velocity, and Magnetic Field
• The fragmentation and stability of hierarchical structure in Serpens South
• Hyperfine excitation of N${}_2$H${}^{+}$ by H${}_2$: Toward a revision of N${}_2$H${}^{+}$ abundance in cold molecular clouds
• Constraints on star formation theories from the Serpens molecular cloud and protocluster
• The specific angular momentum radial profile in dense cores: improved initial conditions for disk formation
• Unveiling the detailed density and velocity structures of the protostellar core B335
• The Initial Conditions of Clustered Star Formation III. The Deuterium Fractionation of the Ophiuchus B2 Core
• Geometry, Kinematics, and Magnetization of Simulated Prestellar Cores
• Zooming in to Massive Star Birth
• The Origins of Protostellar Core Angular Momenta
• The role of the magnetic field in the fragmentation process: the case of G14.225-0.506
• The CARMA-NRO Orion Survey: Protostellar Outflows, Energetics, and Filamentary Alignment
• An Origin for the Angular Momentum of Molecular Cloud Cores: a Prediction from Filament Fragmentation
• Tracing magnetic field morphology using the Velocity Gradient Technique in the presence of CO self-absorption
• On the equilibrium of rotating filaments
• The Earliest Stages of Star and Planet Formation: Core Collapse, and the Formation of Disks and Outflows
• ALMA ACA and Nobeyama observations of two Orion cores in deuterated molecular lines
• On estimating angular momenta of infalling protostellar cores from observations
• A rotating helical filament in the L1251 dark cloud

Cited by in corpus (14)

• Magnetic fields in star formation: a complete compilation of all the DCF estimations
• The Evolution of Protostellar Outflow Cavities, Kinematics, and Angular Distribution of Momentum and Energy in Orion A: Evidence for Dynamical Cores
• Witnessing the fragmentation of a filament into prestellar cores in Orion B/NGC 2024
• Low Mass Stars as Tracers of Star and Cluster Formation
• Supervised machine learning on Galactic filaments Revealing the filamentary structure of the Galactic interstellar medium
• A gravitational and dynamical framework of star formation: The Orion Nebula
• A Study of Stellar Spins in 15 Open Clusters
• Globules and pillars in Cygnus X III. Herschel and upGREAT/SOFIA far-infrared spectroscopy of the globule IRAS 20319+3958 inCygnus X
• A wide-field CO survey towards the California Molecular Filament
• The HH 24 Complex: Jets, Multiple Star Formation, and Orphaned Protostars
• VLA and NOEMA view of the Bok Globule CB 17: the starless nature of a proposed FHSC candidate
• Discovery of a New Population of Galactic HII Regions with Ionized Gas Velocity Gradients
• Random gas motions inside sub-parsec scale supercritical filaments
• Impact of the shape of the prestellar density fluctuations on the core mass function