The Impact of Expanding HII Regions on Filament G37:Curved Magnetic Field and Multiple Direction Material Flows

Abstract

Filament G37 exhibits a distinctive "caterpillar" shape, characterized by two semicircular structures within its 40\,pc-long body, providing an ideal target to investigate the formation and evolution of filaments. By analyzing multiple observational data, such as CO spectral line, the H$\alpha$\,RRL, and multi-wavelength continuum, we find that the expanding H\,{\scriptsize II} regions surrounding filament G37 exert pressure on the structure of the filament body, which kinetic process present as the gas flows in multiple directions along its skeleton. The curved magnetic field structure of filament G37 derived by employing the Velocity Gradient Technique with CO is found to be parallel to the filament body and keeps against the pressure from expanded H\,{\scriptsize II} regions. The multi-directional flows in the filament G37 could cause the accumulation and subsequent collapse of gas, resulting in the formation of massive clumps. The curved structure and star formation observed in filament G37 are likely a result of the filament body being squeezed by the expanding H\,{\scriptsize II} region. This physical process occurs over a timescale of approximately 5\,Myr. The filament G37 provides a potential candidate for end-dominated collapse.

15 pages, 8 figures; accepted by A&A

References in corpus (41)

• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• The VLA Galactic Plane Survey
• ATLASGAL --- towards a complete sample of massive star forming clumps
• Star formation near the Sun is driven by expansion of the Local Bubble
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) I: Project Overview and Initial Results
• Photodissociation and X-Ray Dominated Regions
• Large-scale filaments associated with Milky Way spiral arms
• The JCMT BISTRO Survey: The magnetic field strength in the Orion A filament
• Velocity Gradients as a Tracer for Magnetic Fields
• Interferometric observations of magnetic fields in forming stars
• SPICY: The Spitzer/IRAC Candidate YSO Catalog for the Inner Galactic Midplane
• Triggered massive-star formation on the borders of Galactic HII regions. IV- Star formation at the periphery of Sh2-212
• Tracing interstellar magnetic field using velocity gradient technique: Application to Atomic Hydrogen data
• Aspect Ratio Dependence of the Free-Fall Time for Non-Spherical Symmetries
• Dust polarized emission observations of NGC 6334; BISTRO reveals the details of the complex but organized magnetic field structure of the high-mass star-forming hub-filament network
• A Census of Large-Scale ($\ge$ 10 pc), Velocity-Coherent, Dense Filaments in the Northern Galactic Plane: Automated Identification Using Minimum Spanning Tree
• Magnetic Field Morphology in Interstellar Clouds with the Velocity Gradient Technique
• The JCMT BISTRO Survey: Magnetic Fields Associated with a Network of Filaments in NGC 1333
• Large-scale periodic velocity oscillation in the filamentary cloud G350.54+0.69
• B-fields in Star-Forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main
• Revealing Gravitational Collapse in Serpens G3-G6 Molecular Cloud using Velocity Gradients
• The Radcliffe Wave is Oscillating
• Observational signatures of end-dominated collapse in the S242 filamentary structure
• The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2
• Filament L1482 in the California molecular cloud
• Edge collapse and subsequent longitudinal accretion in Filament S242
• Star-forming sites IC 446 and IC 447: an outcome of end-dominated collapse of Monoceros R1 filament
• The GBT Diffuse Ionized Gas Survey (GDIGS): Survey Overview and First Data Release
• The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament
• JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334
• Velocity structure of the 50 pc-long NGC 6334 filamentary cloud: Hints of multiple compressions and their impact on the cloud properties?
• Simultaneous evidence of edge collapse and hub-filament configurations: A rare case study of a Giant Molecular Filament G45.3+0.1
• Discovery of a coherent, wave-like velocity pattern for the Radcliffe Wave
• Decomposing Magnetic Fields in Three Dimensions over the Central Molecular Zone
• The JCMT BISTRO Survey: Evidence for Pinched Magnetic Fields in Quiescent Filaments of NGC 1333
• Gravitational collapse and accretion flows in the hub filament system G323.46-0.08
• The filamentary structures in the CO emission toward the Milky Way disk
• Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A

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