The role of Galactic HII regions in the formation of filaments. High-resolution submilimeter imaging of RCW 120 with ArTéMiS

Abstract

Massive stars and their associated ionized (HII) regions could play a key role in the formation and evolution of filaments that host star formation. However, the properties of filaments that interact with H regions are still poorly known. To investigate the impact of HII regions on the formation of filaments, we imaged the Galactic HII region RCW 120 and its surroundings where active star formation takes place and where the role of ionization feedback on the star formation process has already been studied. We used the ArTéMiS camera on the APEX telescope and combined the ArTéMiS data at 350 and 450 microns with Herschel-SPIRE/HOBYS. We studied the dense gas distribution around RCW 120 with a resolution of 8 arcsec (0.05 pc at a distance of 1.34 kpc). Our study allows us to trace the median radial intensity profile of the dense shell of RCW 120. This profile is asymmetric, indicating a clear compression from the HII region on the inner part of the shell. The profile is observed to be similarly asymmetric on both lateral sides of the shell, indicating a homogeneous compression over the surface. On the contrary, the profile analysis of a radial filament associated with the shell, but located outside of it, reveals a symmetric profile, suggesting that the compression from the ionized region is limited to the dense shell. The mean intensity profile of the internal part of the shell is well fitted by a Plummer like profile with a deconvolved Gaussian FWHM of 0.09 pc, as observed for filaments in low-mass star-forming regions. This study suggests that compression exerted by HII regions may play a key role in the formation of filaments and may further act on their hosted star formation. ArTéMiS data also suggest that RCW 120 might be a 3D ring, rather than a spherical structure

arXiv comment8 pages, 8 figures, accepted by A&A

References in corpus (51)

• Characterizing interstellar filaments with Herschel in IC5146
• The persistent cosmic web and its filamentary structure I: Theory and implementation
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• What determines the density structure of molecular clouds ? A case study of Orion B with Herschel
• The Formation and Destruction of Molecular Clouds and Galactic Star Formation
• Triggered massive-star formation on the borders of Galactic HII regions. I. A search for `collect and collapse' candidates
• Characterizing the properties of nearby molecular filaments observed with Herschel
• On the universality of interstellar filaments: theory meets simulations and observations
• Triggered star formation on the borders of the Galactic HII region RCW 120
• An empirical model for protostellar collapse
• Star formation around RCW 120, the perfect bubble
• Reconstructing the density and temperature structure of prestellar cores from $Herschel$ data: A case study for B68 and L1689B
• The identification of filaments on far infrared and submillimiter images. Morphology, physical conditions and relation with star formation of filamentary structure
• The unexpectedly large proportion of high-mass star-forming cores in a Galactic mini-starburst
• Molecular Rings and the Thickness of Star-Forming Clouds
• The Pipe Nebula as seen with Herschel: Formation of filamentary structures by large-scale compression ?
• Cloud-cloud collision as a trigger of the high-mass star formation; a molecular line study in RCW120
• Star formation triggered by the Galactic HII region RCW 120: First results from the Herschel Space Observatory
• A multi-scale filament extraction method: getfilaments
• ATLASGAL -- A Galaxy-wide sample of dense filamentary structures
• Turbulence and star formation efficiency in molecular clouds: solenoidal versus compressive motions in Orion B
• Characterizing filaments in regions of high-mass star formation: High-resolution submilimeter imaging of the massive star-forming complex NGC 6334 with ArTéMiS
• Detection of two power-law tails in the probability distribution functions of massive GMCs
• Ionization compression impact on dense gas distribution and star formation, Probability density functions around H ii regions as seen by Herschel
• Near-IR integral field spectroscopy of ionizing stars and young stellar objects on the borders of HII regions
• The Hi-GAL catalogue of dusty filamentary structures in the Galactic Plane
• The role of molecular filaments in the origin of the prestellar core mass function and stellar initial mass function
• On the formation of density filaments in the turbulent interstellar medium
• Unveiling the Early-Stage Anatomy of a Protocluster Hub with ALMA
• Interpreting the Star Formation Efficiency of Molecular Clouds with Ionising Feedback
• Star-forming content of the giant molecular filaments in the Milky Way
• Interstellar filaments and star formation
• The magnetic field structure in molecular cloud filaments
• ALMA imaging of the nascent planetary nebula IRAS 15103-5754
• Mopra CO Observations of the Bubble HII Region RCW120
• Infrared Emission and the Destruction of Dust in HII regions
• Star formation towards the Galactic HII region RCW120
• The role of magnetic fields in the structure and interaction of supershells
• When H II Regions are Complicated: Considering Perturbations from Winds, Radiation Pressure, and Other Effects
• Spatial distribution of star formation related to ionized regions throughout the inner Galactic plane
• Deep GeMS/GSAOI near-infrared observations of N159W in the Large Magellanic Cloud
• A Young GMC Formed at the Interface of Two Colliding Supershells: Observations Meet Simulations
• ALMA observations of RCW 120 Fragmentation at 0.01pc scale
• Measuring the filamentary structure of interstellar clouds through wavelets
• Molecular envelope around the HII region RCW 120
• RCW 120: A possible case of hit and run, elucidated by multi temperature dust mapping
• Photoevaporating PDR models with the Hydra PDR Code
• Gravitational Fragmentation of Expanding Shells. II. Three-dimensional Simulations
• Molecular tracers of radiative feedback in Orion (OMC-1). Widespread CH+ (J=1-0), CO (10-9), HCN (6-5), and HCO+ (6-5) emission
• Anatomy of the massive star-forming region S106: The OI 63 micron line observed with GREAT/SOFIA as a versatile diagnostic tool for the evolution of massive stars
• Kinematics of the Galactic Bubble RCW 120

Cited by in corpus (21)

• 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
• FEEDBACK: a SOFIA Legacy Program to Study Stellar Feedback in Regions of Massive Star Formation
• HII regions and high-mass starless clump candidates II. Fragmentation and induced star formation at ~0.025 pc scale: An ALMA continuum study
• Self-absorption in [CII], ${}^{12}$CO, and HI in RCW120. Building up a geometrical and physical model of the region
• The SOFIA FEEDBACK Legacy Survey: Dynamics and mass ejection in the bipolar HII region RCW 36
• Supervised machine learning on Galactic filaments Revealing the filamentary structure of the Galactic interstellar medium
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -XIII. Ongoing triggered star formation within clump-fed scenario found in the massive ($\sim 1500$ ${\mathrm{M}}_{\odot }$) clump
• Insights on the Sun birth environment in the context of star-cluster formation in hub-filament systems
• Filamentary structures of ionized gas in Cygnus X
• ALMA Observations of Giant Molecular Clouds in M33. II. Triggered High-mass Star Formation by Multiple Gas Colliding Events at the NGC 604 Complex
• Membership analysis and 3D kinematics of the star-forming complex around Trumpler 37 using Gaia-DR3
• APEX CO observations towards the photodissociation region of RCW120
• The warm-up phase in massive star-forming cores around RCW 120
• The Role of Magnetic Fields in Triggered Star Formation of RCW 120
• A Herschel study of G214.5-1.8: a young, cold and quiescent giant molecular filament on the shell of a HI superbubble
• Multiwavelength and astrometric study of the DBS-89-90-91 embedded clusters region
• High resolution observations of 12CO and 13CO(3--2) toward the NGC 6334 extended filament
• Comparison of Herschel and ArTéMiS observations of massive filaments
• The ionization structure and chemical history in isolated H II regions of dwarf galaxies with IFU I. The Sagittarius Dwarf Irregular Galaxy
• A complete survey of filaments in Cygnus X
• Stellar feedback and triggered star formation in the prototypical bubble RCW 120