The location, clustering, and propagation of massive star formation in giant molecular clouds

Abstract

Massive stars are key players in the evolution of galaxies, yet their formation pathway remains unclear. In this work, we use data from several galaxy-wide surveys to build an unbiased dataset of ~700 massive young stellar objects (MYSOs), ~200 giant molecular clouds (GMCs), and ~100 young (<10 Myr) optical stellar clusters (SCs) in the Large Magellanic Cloud. We employ this data to quantitatively study the location and clustering of massive star formation and its relation to the internal structure of GMCs. We reveal that massive stars do not typically form at the highest column densities nor centers of their parent GMCs at the ~6 pc resolution of our observations. Massive star formation clusters over multiple generations and on size scales much smaller than the size of the parent GMC. We find that massive star formation is significantly boosted in clouds near SCs. Yet, whether a cloud is associated with a SC does not depend on either the cloud's mass or global surface density. These results reveal a connection between different generations of massive stars on timescales up to 10 Myr. We compare our work with Galactic studies and discuss our findings in terms of GMC collapse, triggered star formation, and a potential dichotomy between low- and high-mass star formation.

arXiv comment13 pages, 7 figures, in press

References in corpus (60)

• Astropy: A Community Python Package for Astronomy
• On the variation of the Initial Mass Function
• Embedded Clusters in Molecular Clouds
• The CO-to-H2 Conversion Factor
• Control of star formation by supersonic turbulence
• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
• Interpreting Spectral Energy Distributions from Young Stellar Objects. I. A grid of 200,000 YSO model SEDs
• On the Star Formation Rates in Molecular Clouds
• Spitzer Survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (SAGE) I: Overview and Initial Results
• An eclipsing binary distance to the Large Magellanic Cloud accurate to 2 per cent
• Structural Analysis of Molecular Clouds: Dendrograms
• The Star Formation Rate and Gas Surface Density Relation in the Milky Way: Implications for Extragalactic Studies
• Infrared Dark Clouds: precursors to star clusters
• Cluster-formation in the Rosette molecular cloud at the junctions of filaments
• The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X
• The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN. II. Star Formation
• The Aquila prestellar core population revealed by Herschel
• 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
• The "True" Column Density Distribution in Star-Forming Molecular Clouds
• The "Nessie" Nebula: Cluster Formation in a Filamentary Infrared Dark Cloud
• Inverse temperature dependence of the dust submillimeter spectral index
• Cooling, Gravity and Geometry: Flow-driven Massive Core Formation
• A Comparative Study of Giant Molecular Clouds in M51, M33 and the Large Magellanic Cloud
• Collapse and Fragmentation in Finite Sheets
• Triggered star formation on the borders of the Galactic HII region RCW 120
• 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
• High and Intermediate-Mass Young Stellar Objects in the Large Magellanic Cloud
• Giant Molecular Filaments in the Milky Way
• The Effect of Noise on the Dust Temperature - Spectral Index Correlation
• A Uniform CO Survey of the Molecular Clouds in Orion and Monoceros
• The Perils of Clumpfind: The Mass Spectrum of Sub-structures in Molecular Clouds
• Dust and Gas in the Magellanic Clouds from the HERITAGE Herschel Key Project. II. Gas-to-Dust Ratio Variations across ISM Phases
• The Earliest Phases of Star Formation (EPoS): A Herschel Key Program - The precursors to high-mass stars and clusters
• The Luminosity Functions and Timescales of MYSOs and Compact HII regions
• Tidally Triggered Star Formation in Close Pairs of Galaxies: Major and Minor Interactions
• The Extended Environment of M17: A Star Formation History
• Star formation triggered by the Galactic HII region RCW 120: First results from the Herschel Space Observatory
• The Milky Way Project: A statistical study of massive star formation associated with infrared bubbles
• The dangers of being trigger--happy
• The Bolocam Galactic Plane Survey. XIV. Physical Properties of Massive Starless and Star Forming Clumps
• ALMA Resolves 30 Doradus: Sub-parsec Molecular Cloud Structure Near the Closest Super-Star Cluster
• An ATCA 20cm Radio Continuum Study of the Large Magellanic Cloud
• Accuracy of core mass estimates in simulated observations of dust emission
• Search for starless clumps in the ATLASGAL survey
• Modes of Star Formation in Finite Molecular Clouds
• Caught in the act: The Onset of massive star formation
• The Relationship Between Molecular Gas, HI, and Star Formation in the Low-Mass, Low-Metallicity Magellanic Clouds
• Age, size, and position of H ii regions in the Galaxy. Expansion of ionized gas in turbulent molecular clouds
• Giant molecular filaments in the Milky Way II: The fourth Galactic quadrant
• Modelling the dust emission from dense interstellar clouds: disentangling the effects of radiative transfer and dust properties
• A 4.8- and 8.6-GHz Survey of the Large Magellanic Cloud: I The Images
• The Life and Death of Dense Molecular Clumps in the Large Magellanic Cloud
• The statistics of triggered star formation: an overdensity of massive YSOs around Spitzer bubbles
• IRAM-30m large scale survey of ${}^{12}$CO(2-1) and ${}^{13}$CO(2-1) emission in the Orion molecular cloud
• Massive Star Formation
• AGN environments at z<1.5 in the UKIDSS Ultra-Deep Survey
• The Milky Way Project and ATLASGAL: The distribution and physical properties of cold clumps near infrared bubbles
• Estimation of high-resolution dust column density maps. Comparison of modified black-body fits and radiative transfer modelling

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• Star Clusters Across Cosmic Time
• The Spatial Relation between Young Star Clusters and Molecular Clouds in M 51 with LEGUS
• What sets the massive star formation rates and efficiencies of giant molecular clouds?
• ALMA Observations of a Quiescent Molecular Cloud in the Large Magellanic Cloud
• Massive pre-main sequence stars in M17
• Deuterium fractionation and H2D+ evolution in turbulent and magnetized cloud cores
• An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud
• The Young Stellar Population of the metal-poor galaxy NGC 6822
• Unveiling the nature of candidate high-mass young stellar objects in the Magellanic Clouds with near-IR spectroscopy
• Sequential Star Formation in the Young SMC Region NGC 602: Insights from ALMA
• ACA CO(J=2-1) Mapping of the Nearest Spiral Galaxy M33. II. Exploring the Evolution of Giant Molecular Clouds