Evidence of high-mass star formation through multi-scale mass accretion in hub-filament-system clouds

Abstract

We present a statistical study of a sample of 17 hub-filament-system (HFS) clouds of high-mass star formation using high-angular resolution ($\sim$1-2 arcsecond) ALMA 1.3mm and 3mm continuum data. The sample includes 8 infrared (IR)-dark and 9 IR-bright types, which correspond to an evolutionary sequence from the IR-dark to IR-bright stage. The central massive clumps and their associated most massive cores are observed to follow a trend of increasing mass ($M$) and mass surface density ($\Sigma$) with evolution from IR-dark to IR-bright stage. In addition, a mass-segregated cluster of young stellar objects (YSOs) are revealed in both IR-dark and IR-bright HFSs with massive YSOs located in the hub and the population of low-mass YSOs distributed over larger areas. Moreover, outflow feedback in all HFSs are found to escape preferentially through the inter-filamentary diffuse cavities, suggesting that outflows would render a limited effect on the disruption of the HFSs and ongoing high-mass star formation therein. From the above observations, we suggest that high-mass star formation in the HFSs can be described by a multi-scale mass accretion/transfer scenario, from hub-composing filaments through clumps down to cores, that can naturally lead to a mass-segregated cluster of stars.

Accepted for publication in MNRAS; 16 pages, 8 figures, and 3 tables

References in corpus (39)

• Structural Analysis of Molecular Clouds: Dendrograms
• Filamentary structure of star-forming complexes
• Identifying the Low Luminosity Population of Embedded Protostars in the c2d Observations of Clouds and Cores
• The Importance of Radiative Feedback for the Stellar Initial Mass Function
• ATLASGAL --- towards a complete sample of massive star forming clumps
• The dynamics and outcome of star formation with jets, radiation, winds, and supernovae in concert
• A 24 Micron Point Source Catalog of the Galactic Plane from Spitzer/MIPSGAL
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- I. Survey description and a first look at G9.62+0.19
• The Turbulent Origin of Outflow and Spin Misalignment in Multiple Star Systems
• Filamentary Accretion Flows in the Infrared Dark Cloud G14.225-0.506 Revealed by ALMA
• Gravity Driven Magnetic Field at ~1000 au Scales in High-mass Star Formation
• Impact of Protostellar Outflows on Turbulence and Star Formation Efficiency in Magnetized Dense Cores
• ALMA-IMF I -- Investigating the origin of stellar masses: Introduction to the Large Program and first results
• ALMA resolves the spiraling accretion flow in the luminous OB cluster forming region G33.92+0.11
• High-mass Star Formation through Filamentary Collapse and Clump-fed Accretion in G22
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- XI. From inflow to infall in hub-filament systems
• A census of molecular hydrogen outflows and their sources along the Orion A molecular ridge: characteristics and overall distribution
• Alignment Between Protostellar Outflows and Filamentary Structure
• The Star Formation Rate of the Milky Way as seen by Herschel
• Multiscale, multiwavelength extraction of sources and filaments using separation of the structural components: getsf
• FEEDBACK: a SOFIA Legacy Program to Study Stellar Feedback in Regions of Massive Star Formation
• The ALMA Survey of 70 $\mu \mathrm{m}$ Dark High-mass Clumps in Early Stages (ASHES). II: Molecular Outflows in the Extreme Early Stages of Protocluster Formation
• ATOMS:ALMA Three-millimeter Observations of Massive Star-forming regions -- III :Catalogues of candidate hot molecular cores and Hyper/Ultra compact HII regions
• An ALMA study of hub-filament systems I. On the clump mass concentration within the most massive cores
• Distributed Low-Mass Star Formation in the IRDC G34.43+00.24
• The ALMA Survey of 70 $\mu$m Dark High-mass Clumps in Early Stages (ASHES). IV. Star formation signatures in G023.477
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions-IX. A pilot study towards IRDC G034.43+00.24 on multi-scale structures and gas kinematics
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- II. Compact objects in ACA observations and star formation scaling relations
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- XII: Fragmentation and multi-scale gas kinematics in protoclusters G12.42+0.50 and G19.88-0.53
• The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). VI. The core-scale CO-depletion
• Strong dependence of the physical properties of cores on spatial resolution in observations and simulations
• A Morphological Classification of 18190 Molecular Clouds Identified in ${}^{12}$CO Data from the MWISP Survey
• The ALMA Survey of 70 $\mu$m Dark High-mass Clumps in Early Stages (ASHES). V. Deuterated Molecules in the 70 $\mu$m dark IRDC G14.492-00.139
• The ALMA Survey of 70$\mu$m Dark High-mass Clumps in Early Stages (ASHES) III. A Young Molecular Outflow Driven by a Decelerating Jet
• Cloud-cloud collision as origin of the G31.41+0.31 massive protocluster
• An ALMA study of outflow parameters of protoclusters: outflow feedback to maintain the turbulence
• Initial phases of high-mass star formation: A multiwavelength study towards the extended green object G12.42+0.50
• A wide-field CO survey towards the California Molecular Filament
• A graph theory-based multi-scale analysis of hierarchical cascade in molecular clouds : Application to the NGC 2264 region

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• The ALMA Survey of 70 $\mu$m Dark High-mass Clumps in Early Stages (ASHES). IX. Physical Properties and Spatial Distribution of Cores in IRDCs
• Direct observational evidence of the multi-scale, dynamical mass accretion toward a high-mass star forming hub-filament system
• Multiscale Dynamical Scenario of High-mass Star Formation in an IRDC Filament G34
• Kinematics and star formation of hub-filament systems in W49A
• ALMA-IMF XVIII: The assembly of a star cluster: Dense N${}_2$H${}^{+}$ (1-0) kinematics in the massive G351.77 protocluster
• Emergence of high-mass stars in complex fiber networks (EMERGE) V. From filaments to spheroids: the origin of the hub-filament systems
• The Milky Way atlas for linear filaments II. clump rotation versus filament orientation
• Evolution of compressed clouds formed by filament coalescence. I. Oblique collisions
• ALMA-IMF VIII -- Combination of Interferometric Continuum Images with Single-Dish Surveys and Structural Analysis of Six Protoclusters