Multi-scale dynamics in star-forming regions: the interplay between gravity and turbulence

Abstract

In this work we investigate the interplay between gravity and turbulence at different spatial scales and in different density regimes. We analyze a sample of 70 $\mu$m quiet clumps that are divided into three surface density bins and we compare the dynamics of each group with the dynamics of their respective filaments. The densest clumps form within the densest filaments on average, and they have the highest value of the velocity dispersion. The kinetic energy is transferred from the filaments down to the clumps most likely through a turbulent cascade, but we identify a critical value of the surface density, $\Sigma \simeq 0.1$ g cm${}^2$, above which the dynamics changes from being mostly turbulent-driven to mostly gravity-driven. The scenario we obtain from our data is a continuous interplay between turbulence and gravity, where the former creates structures at all scales and the latter takes the lead when the critical surface density threshold is reached. In the densest filaments this transition can occur at the parsec, or even larger scales, leading to a global collapse of the whole region and most likely to the formation of the massive objects.

15 pages, 18 figures, 2 tables. Accepted for publication in MNRAS

References in corpus (63)

• Embedded Clusters in Molecular Clouds
• Theory of Star Formation
• The Formation of Massive Stars from Turbulent Cores
• Characterizing interstellar filaments with Herschel in IC5146
• The Star Formation Rate of Turbulent Magnetized Clouds: Comparing Theory, Simulations, and Observations
• ATLASGAL - The APEX Telescope Large Area Survey of the Galaxy at 870 microns
• Star Clusters Across Cosmic Time
• Re-examining Larson's Scaling Relationships in Galactic Molecular Clouds
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• Hi-GAL: the Herschel infrared Galactic Plane Survey
• High-Mass Star and Massive Cluster Formation in the Milky Way
• The Critical Density and the Effective Excitation Density of Commonly Observed Molecular Dense Gas Tracers
• The Universality of Turbulence in Galactic Molecular Clouds
• Global collapse of molecular clouds as a formation mechanism for the most massive stars
• Global Hierarchical Collapse In Molecular Clouds. Towards a Comprehensive Scenario
• ATLASGAL --- properties of a complete sample of Galactic clumps
• Physical Properties and Galactic Distribution of Molecular Clouds identified in the Galactic Ring Survey
• The initial conditions of stellar protocluster formation. I. A catalogue of Spitzer dark clouds
• A Minimum Column Density of 1 g cm^-2 for Massive Star Formation
• Filamentary Accretion Flows in the Embedded Serpens South Protocluster
• Low Virial Parameters in Molecular Clouds: Implications for High Mass Star Formation and Magnetic Fields
• Accretion-Driven Turbulence as Universal Process: Galaxies, Molecular Clouds, and Protostellar Disks
• On the universality of supersonic turbulence
• Identifying the Low Luminosity Population of Embedded Protostars in the c2d Observations of Clouds and Cores
• The Bolocam Galactic Plane Survey: Survey Description and Data Reduction
• What determines the density structure of molecular clouds ? A case study of Orion B with Herschel
• Gravity or Turbulence? The velocity dispersion-size relation
• ATLASGAL --- towards a complete sample of massive star forming clumps
• SDC13 infrared dark clouds: Longitudinally collapsing filaments?
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) I: Project Overview and Initial Results
• Properties of Hi-GAL clumps in the inner Galaxy]{The Hi-GAL compact source catalogue. I. The physical properties of the clumps in the inner Galaxy ($-71.0^{\circ }<\ell <67.0^{\circ }$)
• On the universality of interstellar filaments: theory meets simulations and observations
• Fragmentation of Molecular Clumps and Formation of Protocluster
• A census of dense cores in the Aquila cloud complex: SPIRE/PACS observations from the Herschel Gould Belt survey
• The Circumstellar Environment of High Mass Protostellar Objects. III Evidence of Infall?
• Formation and evolution of interstellar filaments; Hints from velocity dispersion measurements
• The Bolocam Galactic Plane Survey IX: Data Release 2 and Outer Galaxy Extension
• The dynamical properties of dense filaments in the infrared dark cloud G035.39-00.33
• The identification of filaments on far infrared and submillimiter images. Morphology, physical conditions and relation with star formation of filamentary structure
• High- and Low-Mass Star Forming Regions from Hierarchical Gravitational Fragmentation. High local Star Formation Rates with Low Global Efficiencies
• SEDIGISM: Structure, excitation, and dynamics of the inner Galactic interstellar medium
• Gravity drives the evolution of infrared dark hubs: JVLA observations of SDC13
• Quantifying Observational Projection Effects Using Molecular Cloud Simulations
• ATLASGAL -- A Galaxy-wide sample of dense filamentary structures
• The Bolocam Galactic Plane Survey. XIV. Physical Properties of Massive Starless and Star Forming Clumps
• ALMA survey of massive cluster progenitors from ATLASGAL. Limited fragmentation at the early evolutionary stage of massive clumps
• There are no starless massive proto-clusters in the first quadrant of the Galaxy
• Testing Larson's relationships in massive clumps
• The Hi-GAL catalogue of dusty filamentary structures in the Galactic Plane
• What can simulated molecular clouds tell us about real molecular clouds?
• The TOP-SCOPE survey of Planck Galactic Cold Clumps: Survey overview and results of an exemplar source, PGCC G26.53+0.17
• Line Profiles of Cores within Clusters: II Signatures of Dynamical Collapse during High Mass Star Formation
• Formation of proto-cluster: a virialized structure from gravo-turbulent collapse I. Simulation of cluster formation in collapsing molecular cloud
• CHIMPS: Physical properties of molecular clumps across the inner Galaxy
• Massive 70 micron quiet clumps II: non-thermal motions driven by gravity in massive star formation?
• Gravity or turbulence? IV. Collapsing cores in out-of-virial disguise
• Initial phases of massive star formation in high infrared extinction clouds. II. Infall and onset of star formation
• Fragmentation and dynamical collapse of the starless high-mass star-forming region IRDC18310-4
• Massive 70 micron quiet clumps I: evidence of embedded low/intermediate-mass star formation activity
• Isothermal Fragmentation: Is there a low-mass cut-off?
• Energy budget of forming clumps in numerical simulations of collapsing clouds
• A possible observational bias in the estimation of the virial parameter in virialized clumps
• Hyper: Hybrid Photometry and Extraction Routine

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• Unifying low and high mass star formation through density amplified hubs of filaments
• Zooming in on Individual Star Formation: Low- and High-mass Stars
• Formation of the Hub-Filament System G33.92+0.11: Local Interplay between Gravity, Velocity, and Magnetic Field
• HII regions and high-mass starless clump candidates II. Fragmentation and induced star formation at ~0.025 pc scale: An ALMA continuum study
• Velocity Gradient in the Presence of Self-Gravity: Identifying Gravity-induced Inflow and Determining Collapsing Stage
• Turbulence in a self-gravitating molecular cloud core
• Are massive dense clumps truly sub-virial? A new analysis using Gould Belt ammonia data
• Physical effects on compact high-velocity clouds in the circumgalactic medium
• The dynamic centres of infrared-dark clouds and the formation of cores
• Unveiling the formation of the massive DR21 ridge
• HII regions and high-mass starless clump candidates I: Catalogs and properties
• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Our Galaxy
• A Synergy of the Velocity Gradients Technique and the Probability Density Functions for Identifying Gravitational Collapse in Self-Absorbing Media
• Characterization of dense Planck clumps observed with Herschel and SCUBA-2
• Emergence of high-mass stars in complex fiber networks (EMERGE) V. From filaments to spheroids: the origin of the hub-filament systems
• The Rosetta Stone Project. II. The correlation between star formation efficiency and L/M indicator for the evolutionary stages of star-forming clumps in post-processed radiative magnetohydrodynamics simulations
• Comparison of Herschel and ArTéMiS observations of massive filaments
• The Planck submillimeter properties of Galactic high-mass star forming regions: dust temperatures, luminosities, masses and Star Formation Efficiency
• Multi-scale dynamics in star-forming regions: the interplay between gravity and turbulence
• An S-shaped filament formed due to Cloud-Cloud Collision in molecular cloud G178.28-00.61