Filamentary Fragmentation and Accretion in High-Mass Star-Forming Molecular Clouds

Abstract

Filamentary structures are ubiquitous in high-mass star-forming molecular clouds. Their relation with high-mass star formation is still to be understood. Here we report interferometric observations toward 8 filamentary high-mass star-forming clouds. A total of 50 dense cores are identified in these clouds, most of which present signatures of high-mass star formation. Five of them are not associated with any star formation indicators, hence are prestellar core candidates. Evolutionary phases of these cores and their linewidths, temperatures, NH${}_3$ abundances, and virial parameters are found to be correlated. In a sub-sample of 4 morphologically well-defined filaments, we find that their fragmentation can not be solely explained by thermal or turbulence pressure support. We also investigate distributions of gas temperatures and non-thermal motions along the filaments, and find a spatial correlation between non-thermal linewidths and star formation activities. We find evidence of gas flows along these filaments, and derive an accretion rate along filaments of $\sim$10${}^{-4}$ M${}_{\odot }$ yr${}^{-1}$. These results suggest a strong relationship between massive filaments and high-mass star formation, through i) filamentary fragmentation in very early evolutionary phases to form dense cores, ii) accretion flows along filaments that are important for the growth of dense cores and protostars, and iii) enhancement of non-thermal motion in the filaments by the feedback or accretion during star formation.

31 pages, 11 figures, 8 tables, ApJ Accepted. 3-D interactive figures to visualize outflows (see Figure 7) will be published online, and are available at https://xinglunju.github.io/outflows.html

References in corpus (24)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Mayavi: a package for 3D visualization of scientific data
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• Filamentary structure of star-forming complexes
• A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
• Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane
• Magnetic Fields in High-Mass Infrared Dark Clouds
• Fragmentation of Molecular Clumps and Formation of Protocluster
• On the nature of star-forming filaments: I. Filament morphologies
• The dynamical properties of dense filaments in the infrared dark cloud G035.39-00.33
• A 24 Micron Point Source Catalog of the Galactic Plane from Spitzer/MIPSGAL
• Spitzer IRAC and MIPS Imaging of Clusters and Outflows in 9 High-mass Star Forming Regions
• ALMA resolves the spiraling accretion flow in the luminous OB cluster forming region G33.92+0.11
• VLA observations of ammonia in high-mass star formation regions
• Dust and gas emission in the prototypical hot core G29.96-0.02 at sub-arcsecond resolution
• Dense core properties in the Infrared Dark cloud G14.225-0.506 revealed by ALMA
• Investigating the structure and fragmentation of a highly filamentary IRDC
• The high-mass star-forming region IRAS18182-1433
• The Role of Turbulence and Magnetic Fields in Simulated Filamentary Structure
• Massive 70 micron quiet clumps I: evidence of embedded low/intermediate-mass star formation activity
• Initial Fragmentation in the Infrared Dark Cloud G28.53-0.25
• Star-forming filament models
• Fragmentation and Kinematics of dense molecular cores in the filamentary infrared-dark cloud G011.11-0.12
• SMA Observations of the Hot Molecular Core IRAS 18566+0408

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• ALMA observations of massive clouds in the central molecular zone: slim filaments tracing parsec-scale shocks
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• Network of Star Formation: Fragmentation controlled by scale-dependent turbulent pressure and accretion onto the massive cores revealed in the Cygnus-X GMC complex
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