An ALMA study of the massive molecular clump N159W-North in the Large Magellanic Cloud: A possible gas flow penetrating one of the most massive protocluster systems in the Local Group

Abstract

Massive dense clumps in the Large Magellanic Cloud can be an important laboratory to explore the formation of populous clusters. We report multiscale ALMA observations of the N159W-North clump, which is the most CO-intense region in the galaxy. High-resolution CO isotope and 1.3 mm continuum observations with an angular resolution of $\sim$0."25($\sim$0.07 pc) revealed more than five protostellar sources with CO outflows within the main ridge clump. One of the thermal continuum sources, MMS-2, shows especially massive/dense nature whose total H${}_2$ mass and peak column density are $\sim$10${}^4$ $M_{\odot }$ and $\sim$10${}^{24}$ cm${}^{-2}$, respectively, and harbors massive ($\sim$100 $M_{\odot }$) starless core candidates identified as its internal substructures. The main ridge containing this source can be categorized as one of the most massive protocluster systems in the Local Group. The CO high-resolution observations found several distinct filamentary clouds extending southward from the star-forming spots. The CO (1-0) data set with a larger field of view reveals a conical-shaped, $\sim$30 pc long complex extending toward the northern direction. These features indicate that a large-scale gas compression event may have produced the massive star-forming complex. Based on the striking similarity between the N159W-North complex and the previously reported other two high-mass star-forming clouds in the nearby regions, we propose a $"$teardrops inflow model$"$ that explains the synchronized, extreme star formation across $>$50 pc, including one of the most massive protocluster clumps in the Local Group.

arXiv comment25 pages, 14 figures, 6 tables, Accepted for publication in ApJ

References in corpus (80)

• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Embedded Clusters in Molecular Clouds
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• Toward Understanding Massive Star Formation
• Young massive star clusters
• The Formation of Massive Stars from Turbulent Cores
• Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (SAGE) I: Overview and Initial Results
• High-Mass Star and Massive Cluster Formation in the Milky Way
• Filamentary structure of star-forming complexes
• Massive molecular outflows
• Global collapse of molecular clouds as a formation mechanism for the most massive stars
• Global Hierarchical Collapse In Molecular Clouds. Towards a Comprehensive Scenario
• Dynamic star formation in the massive DR21 filament
• The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. II. Star Formation
• The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN I: Catalog of Molecular Clouds
• The Magellanic Mopra Assessment (MAGMA). I. The Molecular Cloud Population of the Large Magellanic Cloud
• Cluster Mass Functions in the Large and Small Magellanic Clouds: Fading and Size of Sample Effects
• Clustering of Local Group distances: publication bias or correlated measurements? I. The Large Magellanic Cloud
• From Massive Protostars to a Giant HII Region: Submillimeter Imaging of the Galactic Mini-starburst W43
• Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. I. Dust Properties and Insights into the Origin of the Submm Excess Emission
• Do cloud-cloud collisions trigger high-mass star formation? I. Small cloud collisions
• High and Intermediate-Mass Young Stellar Objects in the Large Magellanic Cloud
• Disk-Driven Rotating Bipolar Outflow in Orion Source I
• Cloud-cloud collisions and triggered star formation
• Revealing the physical properties of molecular gas in Orion with a large scale survey in J=2-1 lines of 12CO, 13CO and C18O
• A Problem with the Clustering of Recent Measures of the Distance to the Large Magellanic Cloud
• Physical Properties of Giant Molecular Clouds in the Large Magellanic Cloud
• A new look at the molecular gas in M42 and M43; possible evidence for cloud-cloud collision which triggered formation of the OB stars in the Orion Nebula Cluster
• Triggered O star formation in M20 via cloud-cloud collision: Comparisons between high-resolution CO observations and simulations
• Probing Pre-Protosellar Cores with Formaldehyde
• Formation of the Young Massive Cluster R136 triggered by Tidally-driven Colliding HI Flows
• ALMA Resolves 30 Doradus: Sub-parsec Molecular Cloud Structure Near the Closest Super-Star Cluster
• There are no starless massive proto-clusters in the first quadrant of the Galaxy
• Hubble Tarantula Treasury Project: Unraveling Tarantula's Web. II. Optical and Near Infrared Star Formation History of the Starburst Cluster NGC 2070 in 30 Doradus
• The Evolution of Massive YSOs in the LMC: Part I. Identification and Spectral Classification
• An ALMA view of molecular filaments in the Large Magellanic Cloud II: An early stage of high-mass star formation embedded at colliding clouds in N159W-South
• MUSCLE W49 : A Multi-Scale Continuum and Line Exploration of the Most Luminous Star Formation Region in the Milky Way. I. Data and The Mass Structure of the Giant Molecular Cloud
• The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification III
• The W43-MM1 mini-starburst ridge, a test for star formation efficiency models
• Spitzer View of Young Massive Stars in the LMC HII Complexes. II. N159
• Radiation hydrodynamics simulations of massive star cluster formation in giant molecular clouds
• Massive Outflows Driven by Magnetic Effects in Star Forming Clouds with High Mass Accretion Rates
• The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud
• An ALMA view of molecular filaments in the Large Magellanic Cloud I: The formation of high-mass stars and pillars in the N159E-Papillon Nebula triggered by a cloud-cloud collision
• Sub-millimeter Observations of Giant Molecular Clouds in the Large Magellanic Cloud: Temperature and Density as Determined from J=3-2 and J=1-0 transitions of CO
• How do bound star clusters form?
• Classification of Filament Formation Mechanisms in Magnetized Molecular Clouds
• Milky Way Star Forming Complexes and the Turbulent Motion of the Galaxy's Molecular Gas
• A Hunt for Massive Starless Cores
• The LMC geometry and outer stellar populations from early DES data
• Kinematic Structure of Molecular Gas around High-mass Star YSO, Papillon Nebula, in N159 East in the Large Magellanic Cloud
• Widespread Molecular Outflows in the Infrared Dark Cloud G28.37+0.07: Indications of Orthogonal Outflow-Filament Alignment
• Formation of the active star forming region LHA 120-N 44 triggered by tidally-driven colliding HI flows
• The scaling relations and star formation laws of ministarburst complexes
• A Very Compact Extremely High Velocity Flow toward MMS 5 / OMC-3 Revealed with ALMA
• Spectral Line Survey toward Molecular Clouds in the Large Magellanic Cloud
• Warm and Dense Molecular Gas in the N159 Region: 12CO J=4-3 and 13CO J=3-2 Observations with NANTEN2 and ASTE
• Cloud-cloud collision in the DR 21 cloud as a trigger of massive star formation
• Salt, Hot Water, and Silicon Compounds Tracing Massive Twin Disks
• The 30 Doradus Molecular Cloud at 0.4 pc Resolution with the Atacama Large Millimeter/submillimeter Array: Physical Properties and the Boundedness of CO-emitting Structures
• Dense Clumps in Giant Molecular Clouds in the Large Magellanic Cloud: Density and Temperature Derived from ${}^{13}$CO($J=3-2$) Observations
• HII regions and high-mass starless clump candidates II. Fragmentation and induced star formation at ~0.025 pc scale: An ALMA continuum study
• The first bird's-eye view of a gravitationally unstable accretion disk in high-mass star formation
• Warm CO gas generated by possible turbulent shocks in a low-mass star-forming dense core in Taurus
• Molecular analysis of a high-mass prestellar core candidate in W43-MM1
• First Detection of Ammonia in the Large Magellanic Cloud: The Kinetic Temperature of Dense Molecular Cores in N159W
• Deep GeMS/GSAOI near-infrared observations of N159W in the Large Magellanic Cloud
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45 m telescope (FUGIN). VI. Dense gas and mini-starbursts in the W43 giant molecular cloud complex
• First extragalactic measurement of the turbulence driving parameter: ALMA observations of the star-forming region N159E in the Large Magellanic Cloud
• ALMA Observations of Giant Molecular Clouds in M33 I: Resolving Star Formation Activities in the Giant Molecular Filaments Possibly Formed by a Spiral Shock
• An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. I. Overview: CO Cloud Distributions
• Radiative and mechanical feedback into the molecular gas in the Large Magellanic Cloud. I. N159W
• A view of Large Magellanic Cloud HII regions N159, N132, and N166 through the 345 GHz window
• Structural and Dynamical Analysis of 0.1pc Cores and Filaments in the 30~Doradus-10 Giant Molecular Cloud
• DeGaS-MC: Dense Gas Survey in the Magellanic Clouds I -- An APEX survey of HCO+ and HCN(2-1) toward the LMC and SMC
• Formation of Massive Star Clusters by Fast HI Gas Collision
• Millimeter dust emission compared with other mass estimates in N11 molecular clouds in the LMC
• ALMA Observations of Giant Molecular Clouds in M33. II. Triggered High-mass Star Formation by Multiple Gas Colliding Events at the NGC 604 Complex
• Star burst in W49N presumably induced by cloud-cloud collision
• An ALMA view of the Galactic super star cluster RCW38 at 270-AU resolution

Cited by in corpus (7)

• An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud
• An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog
• Structural and Dynamical Analysis of the Quiescent Molecular Ridge in the Large Magellanic Cloud
• Metallicity Dependence of Molecular Cloud Hierarchical Structure at Early Evolutionary Stages
• ALMA 0.1 pc View of Molecular Clouds Associated with High-Mass Protostellar Systems in the Small Magellanic Cloud: Are Low-Metallicity Clouds Filamentary or Not?
• MAGellanic Outflow and chemistry Survey (MAGOS): Hot cores in the LMC
• Comparison of Herschel and ArTéMiS observations of massive filaments