Cloud-Cloud Collision Induced Star Formation in IRAS 18223-1243

Abstract

In the direction of l = 17.6 - 19 deg, the star-forming sites Sh 2-53 and IRAS 18223-1243 are prominently observed, and seem to be physically detached from each other. Sh 2-53 has been investigated at the junction of the molecular filaments, while a larger-scale environment of IRAS 18223-1243 remains unexplored. The goal of this paper is to investigate the star formation processes in the IRAS site (area ~0.4 deg x 0.4 deg). Based on the GRS 13CO line data, two molecular clouds, peaking at velocities of 45 and 51 km/s, are found. In the position-velocity plots, a relatively weak 13CO emission is detected at intermediate velocities (i.e. 47.5 - 49.5 km/s) between these two clouds, illustrating a link between two parallel elongated velocity structures. These clouds are physically connected in both space and velocity. The MAGPIS data at 20 cm trace free-free continuum emission toward the IRAS 18223-1243 source. Using the Spitzer and UKIDSS photometric data, we have identified infrared-excess young stellar objects (YSOs), and have observed their groups toward the intersection zones of the clouds. IRAS 18223-1243 is also spatially seen at an interface of the clouds. Considering these observational findings, we propose the onset of the collision of two clouds in the IRAS site about 1 Myr ago, which triggered the birth of massive star(s) and the YSO groups. A non-uniform distribution of the GPIPS H-band starlight mean polarization angles is also observed toward the colliding interfaces, indicating the impact of the collision on the magnetic field morphology.

arXiv comment18 pages, 11 figures, 2 tables, Accepted for publication in The Astrophysical Journal

References in corpus (56)

• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
• Toward Understanding Massive Star Formation
• Cold Dark Clouds: The Initial Conditions for Star Formation
• Clouds, filaments and protostars: the Herschel Hi-GAL Milky Way
• A Spitzer Survey of Young Stellar Clusters within One Kiloparsec of the Sun: Cluster Core Extraction and Basic Structural Analysis
• ATLASGAL - The APEX Telescope Large Area Survey of the Galaxy at 870 microns
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• High-Mass Proto-Stellar Candidates - II : Density structure from dust continuum and CS emission
• High-Mass Proto-Stellar Candidates - I : The Sample and Initial Results
• Infrared Dark Clouds: precursors to star clusters
• Realistic Ionizing Fluxes for Young Stellar Populations from 0.05 to twice solar metallicity
• Infrared Extinction Toward Nearby Star-Forming Regions
• The Spatial Distribution of Star Formation in the Solar Neighbourhood: Do all stars form in clusters?
• Formation of Massive Molecular Cloud Cores by Cloud-cloud Collision
• Resolution of the Distance Ambiguity for Galactic HII Regions
• Do cloud-cloud collisions trigger high-mass star formation? I. Small cloud collisions
• Molecular clouds towards RCW 49 and Westerlund 2; Evidence for cluster formation triggered by cloud-cloud collision
• Molecular Clouds Toward the Super Star Cluster NGC3603; Possible Evidence for a Cloud-Cloud Collision in Triggering the Cluster Formation
• Isolating signatures of major cloud-cloud collisions using position-velocity diagrams
• A 24 Micron Point Source Catalog of the Galactic Plane from Spitzer/MIPSGAL
• The early stages of star formation in Infrared Dark Clouds: characterizing the core dust properties
• Early magnetic B-type stars: X-ray emission and wind properties
• The two molecular clouds in RCW 38; evidence for formation of the youngest super star cluster in the Milky Way triggered by cloud-cloud collision
• Temperature and Density Distribution in the Molecular Gas Toward Westerlund 2: Further Evidence for Physical Association
• Triggered O star formation in M20 via cloud-cloud collision: Comparisons between high-resolution CO observations and simulations
• Isolating signatures of major cloud-cloud collisions II: The lifetimes of broad bridge features
• Smoothed Particle Hydrodynamics simulations of expanding HII regions. I. Numerical methods and tests
• VLA observations of ammonia in high-mass star formation regions
• The Protostar in the massive Infrared Dark Cloud IRDC18223-3
• Filament Fragmentation in High-Mass Star Formation
• Formation of Massive, Dense Cores by Cloud-Cloud Collisions
• Measurements of resonant scattering in the Perseus cluster core with Hitomi SXS
• A multi-wavelength study of star formation activity in the S235 complex
• The North American and Pelican Nebulae II. MIPS Observations and Analysis
• Kinematic structure of massive star-forming regions - I. Accretion along filaments
• GMC Collisions as Triggers of Star Formation. V. Observational Signatures
• RCW 36 in the Vela Molecular Ridge: Evidence for a high-mass star cluster formation triggered by Cloud-Cloud Collision
• Physical environment of massive star-forming region W42
• Molecular clouds in the NGC 6334 and NGC 6357 region; Evidence for a 100 pc-scale cloud-cloud collision triggering the Galactic mini-starbursts
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45-m telescope (FUGIN) : Molecular clouds toward W33 ; possible evidence for a cloud-cloud collision triggering O star formation
• Study of morphology and stellar content of the Galactic HII region IRAS 16148-5011
• Observational signatures of cloud-cloud collision in the extended star-forming region S235
• Rotational Structure and Outflow in the Infrared Dark Cloud 18223-3
• Star formation around mid-infrared bubble N37: Evidence of cloud-cloud collision
• New insights in the mid-infrared bubble N49 site: a clue of collision of filamentary molecular clouds
• Star Formation Activity in the molecular cloud G35.20$-$0.74: onset of cloud-cloud collision
• Large-scale CO J=1-0 observations of the giant molecular cloud associated with the infrared ring N35 with the Nobeyama 45-m telescope
• Star formation in the Sh 2-53 region influenced by accreting molecular filaments
• The formation of a Spitzer bubble RCW79 triggered by cloud-cloud collision
• A multi-wavelength observation and investigation of six infrared dark clouds
• Molecular gas in the compact H{\sc ii} region RCW 166; possible evidence for an early phase of cloud-cloud collision prior to the bubble formation
• Molecular Lines of 13 Galactic Infrared Bubble Regions
• The embedded ring-like feature and star formation activities in G35.673-00.847
• Satellite image classification and segmentation using non-additive entropy

Cited by in corpus (14)

• Cloud-cloud collisions and triggered star formation
• Cloud-cloud collisions in the common foot point of molecular loops 1 and 2 in the Galactic Center
• Formation of the active star forming region LHA 120-N 44 triggered by tidally-driven colliding HI flows
• SiO emission as a probe of Cloud-Cloud Collisions in Infrared Dark Clouds
• Physical and chemical complexity in high-mass star-forming regions with ALMA. I. Overview and evolutionary trends of physical properties
• The study of a system of H II regions toward l = 24.8 deg, b = 0.1 deg at the Galactic bar - Norma arm interface
• Unveiling molecular clouds toward bipolar HII region G8.14+0.23
• Coupling local to global star formation in spiral galaxies: the effect of differential rotation
• Uncovering distinct environments in an extended physical system around the W33 complex
• Evidence of interacting elongated filaments in the star-forming site AFGL 5142
• New insights in giant molecular cloud hosting S147/S153 complex: signatures of interacting clouds
• Gas dynamics in the star forming region G18.148$-$0.283: Is it a manifestation of two colliding molecular clouds?
• Ionized filaments and ongoing physical processes in massive star-forming sites around l = 345.5 degree
• Research on the Interstellar Medium and Star Formation in the Galaxy: An Indian Perspective