A low-mass hub-filament with double centre revealed in NGC2071-North

Abstract

We present the first analysis in NGC2071-North as a resolved hub-filament featuring a double centre. This $\sim 1.5\times 1.5$ parsec-scale filament hub contains $\sim$500 $M_{\odot }$. Seen from Planck, magnetic field lines may have facilitated the gathering of material at this isolated location. The energy balance analysis, supported by infalling gas signatures, reveal that these filaments are currently forming stars. Herschel 100 $\mu$m emission concentrates in the hub, at IRAS 05451+0037 and LkH$\alpha$ 316, and presents diffuse lobes and loops around them. We suggest that such a double centre could be formed, because the converging locations of filament pairs are offset, by 2.3${}^{\prime }$ (0.27 pc). This distance also matches the diameter of a hub-ring, seen in column density and molecular tracers, such as HCO${}^{+}$(1$-$0) and HCN(1$-$0), that may indicate a transition and the connection between the hub and the radiating filaments. We argue that all of the three components of the emission star LkH$\alpha$ 316 are in physical association. We find that a $\sim$0.06 pc-sized gas loop, attached to IRAS 05451+0037, can be seen at wavelengths all the way from Pan-STARRS-i to Herschel-100 $\mu$m. These observations suggest that both protostars at the double hub centre are interacting with the cloud material. In our ${}^{13}$CO data, we do not seem to find the outflow of this region that was identified in the 80s with much lower resolution.

arXiv comment18 pages, 12 figures, accepted for publication in the MNRAS

References in corpus (55)

• Gaia Data Release 2. Summary of the contents and survey properties
• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• The distance to the Orion Nebula
• Characterizing interstellar filaments with Herschel in IC5146
• The persistent cosmic web and its filamentary structure I: Theory and implementation
• Physical Conditions in Regions of Star Formation
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• Filamentary structure of star-forming complexes
• The Spitzer Space Telescope Survey of the Orion A & B Molecular Clouds - Part I: A Census of Dusty Young Stellar Objects and a Study of their Mid-IR Variability
• Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
• Physical properties of molecular clouds for the entire Milky Way disk
• Global collapse of molecular clouds as a formation mechanism for the most massive stars
• Cluster-formation in the Rosette molecular cloud at the junctions of filaments
• 3D maps of the local ISM from inversion of individual color excess measurements
• A Large Catalog of Accurate Distances to Local Molecular Clouds: The Gaia DR2 Edition
• An Imprint of Molecular Cloud Magnetization in the Morphology of the Dust Polarized Emission
• The Large and Small Scale Structures of Dust in the Star-Forming Perseus Molecular Cloud
• Characterizing the properties of nearby molecular filaments observed with Herschel
• Magnetically Regulated Star Formation in 3D: The Case of Taurus Molecular Cloud Complex
• An Extinction Threshold for Protostellar Cores in Ophiuchus
• A Large Catalog of Accurate Distances to Molecular Clouds from PS1 Photometry
• Probing the formation of intermediate- to high-mass stars in protoclusters: A detailed millimeter study of the NGC 2264 clumps
• The JCMT Gould Belt Survey: First results from the SCUBA-2 observations of the Ophiuchus molecular cloud and a virial analysis of its prestellar core population
• The Bolocam Galactic Plane Survey. VII. Characterizing the Properties of Massive Star-Forming Regions
• A census of dense cores in the Taurus L1495 cloud from the Herschel Gould Belt Survey
• The Pipe Nebula as seen with Herschel: Formation of filamentary structures by large-scale compression ?
• The Link between Magnetic Fields and Filamentary Clouds: Bimodal Cloud Orientations in the Gould Belt
• Ionizing feedback from massive stars in massive clusters: Fake bubbles and untriggered star formation
• Properties of the dense core population in Orion B as seen by the Herschel Gould Belt survey
• Dynamics of cluster-forming hub-filament systems: The case of the high-mass star-forming complex Monoceros R2
• What are we learning from the relative orientation between density structures and the magnetic field in molecular clouds?
• Testing the universality of the star formation efficiency in dense molecular gas
• The Herschel view of the dense core population in the Ophiuchus molecular cloud
• Using Herschel and Planck observations to delineate the role of magnetic fields in molecular cloud structure
• Change of Magnetic Field$-$Gas Alignment at Gravity-Driven Alfvénic Transition in Molecular Clouds: Implications for Dust Polarization Observations
• Morphology and Kinematics of Filaments in the Serpens and Perseus Molecular Clouds
• Nested shells reveal the rejuvenation of the Orion-Eridanus superbubble
• Infall Motions in Massive Star-Forming Regions: Results from Years 1 & 2 of the MALT90 Survey
• Helical Magnetic Fields in Molecular Clouds? A New Method to Determine the Line-of-Sight Magnetic Field Structure in Molecular Clouds
• The Herschel view of star formation in the Rosette molecular cloud under the influence of NGC 2244
• A catalogue of dense cores and young stellar objects in the Lupus complex based on Herschel Gould Belt Survey observations
• Initial phases of massive star formation in high infrared extinction clouds. II. Infall and onset of star formation
• The JCMT Gould Belt Survey: A First Look at Dense Cores in Orion B
• The width of Herschel filaments varies with distance
• On the typical width of Herschel filaments
• Physical environment of massive star-forming region W42
• Massive 70 micron quiet clumps I: evidence of embedded low/intermediate-mass star formation activity
• Far-infrared observations of a massive cluster forming in the Monoceros R2 filament hub
• Statistical analysis of the interplay between magnetic fields and filaments hosting Planck Galactic Cold Clumps
• The census of dense cores in the Serpens region from the Herschel Gould Belt Survey
• The JCMT BISTRO Survey: An 850/450$\mu$m Polarization Study of NGC 2071IR in OrionB
• Optical TiO and VO band emission in two embedded protostars: IRAS 04369+2539 and IRAS 05451+0037
• The Kinematic and Chemical Properties of a Potential Core-Forming Clump: Perseus B1-E

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