An ALMA study of the Orion Integral Filament: I. Evidence for narrow fibers in a massive cloud

Abstract

Abridged. Are all filaments bundles of fibers? To address this question, we have investigated the gas organization within the paradigmatic Integral Shape Filament (ISF). We combined two new ALMA Cycle 3 mosaics with previous IRAM 30m observations to produce a high-dynamic range N${}_2$H${}^{+}$(1-0) emission map of the ISF tracing its high-density material and velocity structure down to scales of 0.009 pc. From the analysis of the gas kinematics, we identify a total of 55 dense fibers in the central region of the ISF. Independently of their location, these fibers are characterized by transonic internal motions, lengths of ~0.15 pc, and masses per-unit-length close to those expected in hydrostatic equilibrium. The ISF fibers are spatially organized forming a dense bundle with multiple hub-like associations likely shaped by the local gravitational potential. Within this complex network, the ISF fibers show a compact radial emission profile with a median FWHM of 0.035 pc systematically narrower than the previously proposed universal 0.1 pc filament width. Our ALMA observations reveal complex bundles of fibers in the ISF, suggesting strong similarities between the internal substructure of this massive filament and previously studied lower-mass objects. The fibers show identical dynamic properties in both low- and high-mass regions, and their widespread detection suggests a preferred organizational mechanism of gas in which the physical fiber dimensions (width and length) are self-regulated depending on their intrinsic gas density. Combined with previous works, we identify a systematic increase of the surface density of fibers as a function of the total mass per-unit-length in filamentary clouds. Based on this empirical correlation, we propose a unified star-formation scenario where the observed differences between low- and high-mass clouds emerge naturally from the initial concentration of fibers.

24 pages, 18 figures. Accepted by A&A. Data products available at https://sites.google.com/site/orion4dproject/

References in corpus (24)

• Cold Dark Clouds: The Initial Conditions for Star Formation
• The distance to the Orion Nebula
• Filamentary structure of star-forming complexes
• Herschel-Planck dust optical-depth and column-density maps: I. Method description and results for Orion
• The anatomy of the Orion B Giant Molecular Cloud: A local template for studies of nearby galaxies
• On the nature of star-forming filaments: I. Filament morphologies
• Chains of dense cores in the Taurus L1495/B213 complex
• On the Structure of the Orion A Cloud and the Formation of the Orion Nebula Cluster
• 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
• Molecular Line Emission as a Tool for Galaxy Observations (LEGO). I. HCN as a tracer of moderate gas densities in molecular clouds and galaxies
• On the frequency of N2H+ and N2D+
• Evolution of column density distributions within Orion~A
• CARMA Large Area Star Formation Survey: Observational Analysis of Filaments in the Serpens South Molecular Cloud
• A closer look at the "characteristic" width of molecular cloud filaments
• High abundance ratio of ${}^{13}$CO to C${}^{18}$O toward photon-dominated regions in the Orion-A giant molecular cloud
• CARMA Large Area Star Formation Survey: Structure and Kinematics of Dense Gas in Serpens Main
• Investigating the structure and fragmentation of a highly filamentary IRDC
• Unveiling the Early-Stage Anatomy of a Protocluster Hub with ALMA
• Are fibres in molecular cloud filaments real objects?
• IRAM-30m large scale survey of ${}^{12}$CO(2-1) and ${}^{13}$CO(2-1) emission in the Orion molecular cloud
• The Gould's Belt Very Large Array Survey III. The Orion region
• Some like it cold: molecular emission and effective dust temperatures of dense cores in the Pipe Nebula
• Gravitational Focusing and the Star Cluster Initial Mass Function

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