The role of the magnetic field in the fragmentation process: the case of G14.225-0.506
arXiv:2010.13503 · doi:10.1051/0004-6361/202039152
Abstract
B-fields are predicted to play a role in the formation of filamentary structures and their fragmentation process. We aim at investigating the role of the B-field in the process of core fragmentation toward the hub-filament systems in the IRDC G14.2, which present different fragmentation level. We performed observations of the thermal dust polarization at 350 μm using the CSO toward the hubs. We applied the polarization--intensity-gradient method to estimate the significance of the B-field over the G-force. The B-field in Hub-N shows a uniform structure along the E-W orientation, perpendicular to the major axis of the hub-filament system. The I-gradient in Hub-N displays a local minimum coinciding with the dust core MM1a detected with interferometric observations. The B-field orientation is perturbed when approaching the dust core. Hub-S shows 2 local minima, reflecting the bimodal distribution of the B-field. In Hub-N, both E and W of the hub-filament system, the I-gradient and the B-field are parallel whereas they tend to be perpendicular when penetrating the filaments and hub. The analysis of the δ- and Σ B-maps indicate that, the B-field cannot prevent the collapse, suggesting that the B-field is initially dragged by the infalling motion and aligned with it, or is channeling material toward the central ridge from both sides. Values of Σ B > 1 are found toward a N-S ridge encompassing the dust emission peak, indicating that in this region B-field dominates over G-force, or that with the current angular resolution we cannot resolve an hypothetical more complex structure. We estimated the B-field strength, the MtF ratio and the A-M number, and found differences between the 2 hubs. The different levels of fragmentation observed in these 2 hubs could arise from the differences in the B-field properties rather than from different intensity of the G-field.
arXiv comment14 pages, 9 figures
References in corpus (72)
- Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models
- Clouds, filaments and protostars: the Herschel Hi-GAL Milky Way
- Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
- Filamentary structure of star-forming complexes
- Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
- Tracing Magnetic Fields with Aligned Grains
- Global Hierarchical Collapse In Molecular Clouds. Towards a Comprehensive Scenario
- Filamentary Accretion Flows in the Embedded Serpens South Protocluster
- The Turbulent Shock Origin of Proto--Stellar Cores
- SCUBA Polarization Measurements of the Magnetic Field Strengths in the L183, L1544, and L43 Prestellar Cores
- Dispersion of Magnetic Fields in Molecular Clouds. II
- SDC13 infrared dark clouds: Longitudinally collapsing filaments?
- Formation of Massive Molecular Cloud Cores by Cloud-cloud Collision
- A Correlation Between Surface Densities of Young Stellar Objects and Gas in Eight Nearby Molecular Clouds
- Collapse of massive magnetized dense cores using radiation-magneto-hydrodynamics: early fragmentation inhibition
- Magnetic Fields in High-Mass Infrared Dark Clouds
- Magnetic Fields and Massive Star Formation
- The ALMA Survey of 70 m dark High-mass clumps in Early Stages (ASHES). I. Pilot Survey: Clump Fragmentation
- The link between turbulence, magnetic fields, filaments, and star formation in the Central Molecular Zone cloud G0.253+0.016
- 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
- The Efficiency of Grain Alignment in Dense Interstellar Clouds: A Reassessment of Constraints from Near Infrared Polarization
- Trigonometric Parallaxes of Massive Star Forming Regions: VIII. G12.89+0.49, G15.03-0.68 (M17) and G27.36-0.16
- On the nature of star-forming filaments: II. Sub-filaments and velocities
- High Resolution Millimeter-Wave Mapping of Linearly Polarized Dust Emission: Magnetic Field Structure in Orion
- Gravity drives the evolution of infrared dark hubs: JVLA observations of SDC13
- Filamentary Fragmentation and Accretion in High-Mass Star-Forming Molecular Clouds
- Near-Infrared Imaging Polarimetry Toward Serpens South: Revealing the Importance of the Magnetic Field
- CARMA Large Area Star Formation Survey: Observational Analysis of Filaments in the Serpens South Molecular Cloud
- Unveiling a network of parallel filaments in the Infrared Dark Cloud G14.225-0.506
- Alignment Between Flattened Protostellar Infall Envelopes and Ambient Magnetic Fields
- Early stages of cluster formation: fragmentation of massive dense cores down to ~1000 AU
- Filamentary Accretion Flows in the Infrared Dark Cloud G14.225-0.506 Revealed by ALMA
- Fragmentation of massive dense cores down to ~1000 AU: Relation between fragmentation and density structure
- Evolution of Magnetic Fields in High Mass Star Formation: Linking field geometry and collapse for the W51 e2/e8 cores
- Using Herschel and Planck observations to delineate the role of magnetic fields in molecular cloud structure
- Magnetized filamentary gas flows feeding the young embedded cluster in Serpens South
- Interferometric Mapping of Magnetic Fields in Star-forming Regions I. W51 e1/e2 Molecular Cores
- Magnetic Field Strength Maps for Molecular Clouds: A New Method Based on a Polarization - Intensity Gradient Relation
- A holistic perspective on the dynamics of G035.39-00.33: the interplay between gas and magnetic fields
- Gravity, Magnetic Field, and Turbulence: Relative Importance and Impact on Fragmentation in the Infrared Dark Cloud G34.43+00.24
- Dense core properties in the Infrared Dark cloud G14.225-0.506 revealed by ALMA
- Magnetic Field Structure around Low-Mass Class 0 Protostars: B335, L1527 and IC348-SMM2
- Morphology and Kinematics of Filaments in the Serpens and Perseus Molecular Clouds
- ALMA imaging of the nascent planetary nebula IRAS 15103-5754
- ALMA resolves the hourglass magnetic field in G31.41+0.31
- JCMT BISTRO Survey observations of the Ophiuchus Molecular Cloud: Dust grain alignment properties inferred using a Ricean noise model
- Evidence for Delayed Massive Star Formation in the M17 Proto-OB Association
- The Importance of the Magnetic Field from an SMA-CSO-Combined Sample of Star-Forming Regions
- Dense gas kinematics and a narrow filament in the Orion A OMC1 region using NH3
- Core and filament formation in magnetized, self-gravitating isothermal layers
- What is controlling the fragmentation process in the Infrared Dark Cloud G14.225-0.506? Differet level of fragmentation in twin hubs
- Magnetic fields in the infrared dark cloud G34.43+0.24
- The Role of Turbulence and Magnetic Fields in Simulated Filamentary Structure
- Polarization Properties and Magnetic Field Structures in the High-Mass Star-Forming Region W51 Observed with ALMA
- Magnetic Fields and Infall Motions in NGC 1333 IRAS 4
- Magnetized interstellar molecular clouds: II. The Large-Scale Structure and Dynamics of Filamentary Molecular Clouds
- Cloud structure of three Galactic infrared dark star-forming regions from combining ground and space based bolometric observations
- Rapid Circumstellar Disk Evolution and an Accelerating Star Formation Rate in the Infrared Dark Cloud M17 SWex
- Quantifying the Significance of the Magnetic Field from Large-Scale Cloud to Collapsing Core: Self-Similarity, Mass-to-Flux Ratio and Star Formation Efficiency
- Magnetically Dominated Parallel Interstellar Filaments at the Infrared Dark Cloud G14.225-0.506
- Magnetically-regulated fragmentation of a massive, dense and turbulent clump
- Design and Initial Performance of SHARP, a Polarimeter for the SHARC-II Camera at the Caltech Submillimeter Observatory
- The fragmentation properties of massive protocluster gas clumps: an ALMA study
- Interpreting the Role of the Magnetic Field from Dust Polarization Maps
- The shortest periodic and flaring flux variability of a methanol maser emission at 6.7 GHz in G 014.23-00.50
- Formation of dense structures induced by filament collisions. Correlation of density, kinematics and magnetic field in the Pipe nebula
- An Estimation of the Star Formation Rate in the Perseus Complex
- Galactic Cold Cores VII: Filament Formation and Evolution - Methods & Observational Constraints
- Astronomical Image Processing with Array Detectors
- IRAS 18153-1651: an H II region with a possible wind bubble blown by a young main-sequence B star
Cited by in corpus (12)
- Does the magnetic field suppress fragmentation in massive dense cores?
- Magnetic fields in star formation: a complete compilation of all the DCF estimations
- Density profile evolution during prestellar core collapse: Collapse starts at the large scale
- Magnetic field properties in star formation: a review of their analysis methods and interpretation
- Multi-scale physical properties of NGC 6334 as revealed by local relative orientations between magnetic fields, density gradients, velocity gradients, and gravity
- Rotating filament in Orion B: Do cores inherit their angular momentum from their parent filament?
- B-fields And dust in interstelLar fiLAments using Dust POLarization (BALLAD-POL): I. The massive filament G11.11-0.12 observed by SOFIA/HAWC+
- The role of magnetic fields in the formation of multiple massive stars
- A Multi-Scale Picture of Magnetic Field and Gravity from Large-Scale Filamentary Envelope to Core-Accreting Dust Lanes in the High-Mass Star-Forming Region W51
- W51North: A protocluster emerging out of a thermally inhibited fragmenting cloud
- ALMAGAL V. Relations between the core populations and the parent clump physical properties
- Some Aspects of Rotation and Magnetic Field Morphology in the Infrared Dark Cloud G34.43+00.24