The ATLASGAL survey: The sample of young massive cluster progenitors

Abstract

The progenitors of high-mass stars and clusters are still challenging to recognise. Only unbiased surveys, sensitive to compact regions of high dust column density, can unambiguously reveal such a small population of particularly massive and cold clumps. Here we study a flux limited sample of compact sources from the ATLASGAL survey to identify a sample of candidate progenitors of massive clusters in the inner Galaxy. Sensitive mid-infrared data at 21-24 $\mu$m from the WISE and MIPSGAL surveys were explored to search for embedded objects, and complementary spectroscopic data were used to investigate their stability and star formation activity. Based on such ancillary data we identify an unbiased sample of infrared-quiet massive clumps in the Galaxy that potentially represent the earliest stages of massive cluster formation. An important fraction of this sample consists of sources that have not been studied in detail before. Comparing their properties to clumps hosting more evolved embedded objects, we find that they exhibit similar physical properties in terms of mass and size, suggesting that infrared-quiet massive clumps are not only capable of forming high-mass stars, but likely also follow a single evolutionary track leading to the formation of massive clusters. The majority of the sources are not in virial-equilibrium, suggesting collapse on the clump scale. This is in line with the low number of infrared-quiet massive clumps and earlier findings that star formation, in particular for high-mass objects is a fast, dynamic process. We propose a scenario in which massive clumps start to fragment and collapse before their final mass is accumulated indicating that strong self-gravity and global collapse is needed to build up rich clusters and the most massive stars.

arXiv commentAccepted by A&A (version after language editing). The abstract is shortened to fit the ArXiv format, and the figure quality is strongly degraded due to the size limitations

References in corpus (104)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Theory of Star Formation
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
• Toward Understanding Massive Star Formation
• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The Formation of Massive Stars from Turbulent Cores
• Cold Dark Clouds: The Initial Conditions for Star Formation
• ATLASGAL - The APEX Telescope Large Area Survey of the Galaxy at 870 microns
• The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• Competitive accretion in embedded stellar cluster
• High-Mass Proto-Stellar Candidates - I : The Sample and Initial Results
• A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
• Infrared Dark Clouds: precursors to star clusters
• The Spitzer Space Telescope Survey of the Orion A & B Molecular Clouds - Part I: A Census of Dusty Young Stellar Objects and a Study of their Mid-IR Variability
• Spitzer Observations of NGC 1333: A Study of Structure and Evolution in a Nearby Embedded Cluster
• Star formation through gravitational collapse and competitive accretion
• Global collapse of molecular clouds as a formation mechanism for the most massive stars
• Dynamic star formation in the massive DR21 filament
• Parallaxes and proper motions of interstellar masers toward the Cygnus X star-forming complex. I. Membership of the Cygnus X region
• A Minimum Column Density of 1 g cm^-2 for Massive Star Formation
• The initial conditions of stellar protocluster formation. I. A catalogue of Spitzer dark clouds
• The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X
• Absolute Calibration and Characterization of the Multiband Imaging Photometer for Spitzer. I. The Stellar Calibrator Sample and the 24 micron Calibration
• Low Virial Parameters in Molecular Clouds: Implications for High Mass Star Formation and Magnetic Fields
• The Red MSX Source Survey: the Massive Young Stellar Population of our Galaxy
• The Large APEX Bolometer Camera LABOCA
• The 6-GHz methanol multibeam maser catalogue I: Galactic Centre region, longitudes 345 to 6
• How Many Infrared Dark Clouds can form Massive Stars and Clusters?
• ATLASGAL --- towards a complete sample of massive star forming clumps
• The ATLASGAL survey: a catalog of dust condensations in the Galactic plane
• Ammonia from cold high-mass clumps discovered in the inner Galactic disk by the ATLASGAL survey
• The Formation of Massive Stars by Accretion Through Trapped Hypercompact HII Regions
• Fragmentation at the Earliest Phase of Massive Star Formation
• From Massive Protostars to a Giant HII Region: Submillimeter Imaging of the Galactic Mini-starburst W43
• New infrared star clusters in the southern Milky Way with 2MASS
• Fragmentation and mass segregation in the massive dense cores of Cygnus X
• The Co-ordinated Radio and Infrared Survey for High Mass Star Formation (The CORNISH Survey) - I. Survey Design
• Mid-Infrared Extinction Mapping of Infrared Dark Clouds II. The Structure of Massive Starless Cores and Clumps
• The Co-ordinated Radio and Infrared Survey for High-Mass Star Formation - II. Source Catalogue
• Trigonometric Parallax of W51 Main/South
• Characterizing Precursors to Stellar Clusters with Herschel
• The Dynamics of Massive Starless Cores with ALMA
• ATLASGAL --- Environments of 6.7\,GHz methanol masers
• The 6-GHz methanol multibeam maser catalogue II: Galactic longitudes 6 to 20
• High-dynamic-range extinction mapping of infrared dark clouds: Dependence of density variance with sonic Mach number in molecular clouds
• Parallaxes for W49N and G048.60+0.02: Distant Star Forming Regions in the Perseus Spiral Arm
• The Initial Mass Function of the Orion Nebula Cluster across the H-burning limit
• ATLASGAL --- properties of compact HII regions and their natal clumps
• Trigonometric Parallaxes of Massive Star Forming Regions: VIII. G12.89+0.49, G15.03-0.68 (M17) and G27.36-0.16
• Trigonometric parallaxes of star forming regions in the Sagittarius spiral arm
• The Bolocam Galactic Plane Survey. VII. Characterizing the Properties of Massive Star-Forming Regions
• W43: the closest molecular complex of the Galactic Bar?
• CO outflows from high-mass Class 0 protostars in Cygnus-X
• The Luminosity Functions and Timescales of MYSOs and Compact HII regions
• Massive Protostars in the Infrared Dark Cloud MSXDC G034.43+00.24
• The Parallax of W43: a Massive Star Forming Complex near the Galactic Bar
• A candidate circumbinary Keplerian disk in G35.20-0.74 N: A study with ALMA
• ATLASGAL-selected massive clumps in the inner Galaxy: I. CO depletion and isotopic ratios
• Star formation triggered by the Galactic HII region RCW 120: First results from the Herschel Space Observatory
• The first Hi-GAL observations of the outer Galaxy: a look to star formation in the third Galactic quadrant in the longitude range 216.5 < l < 225.5
• Gas dynamics in Massive Dense Cores in Cygnus-X
• The RMS Survey: Radio observations of candidate massive YSOs in the southern hemisphere
• ATLASGAL-selected massive clumps in the inner Galaxy III. Dust Continuum Characterization of an Evolutionary Sample
• ATLASGAL - Kinematic distances and the dense gas mass distribution of the inner Galaxy
• The Bolocam Galactic Plane Survey. XIV. Physical Properties of Massive Starless and Star Forming Clumps
• Trigonometric parallaxes to star-forming regions within 4 kpc of the galactic center
• ATLASGAL-selected massive clumps in the inner Galaxy, II: Characterisation of different evolutionary stages and their SiO emission
• The Mass-Size Relation from Clouds to Cores. I. A new Probe of Structure in Molecular Clouds
• ALMA survey of massive cluster progenitors from ATLASGAL. Limited fragmentation at the early evolutionary stage of massive clumps
• Search for starless clumps in the ATLASGAL survey
• Spectrophotometric Distances to Galactic H\,{\sc{ii}} Regions
• The ATLASGAL survey: distribution of cold dust in the Galactic plane. Combination with Planck data
• An Ordered Bipolar Outflow from a Massive Early-Stage Core
• Herschel Observations of the W43 "mini-starburst"
• The Giant Molecular Cloud associated with RCW 106 -- A 1.2 mm continuum mapping study
• SMA observations of Infrared Dark Clouds: A tale of two cores
• On the simultaneous evolution of massive protostars and their host cores
• Trigonometric Parallaxes of Massive Star Forming Regions: G012.88+0.48 and W33
• Sub-arcsecond sub-mm continuum observations of Orion-KL
• 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 W43-MM1 mini-starburst ridge, a test for star formation efficiency models
• Annual Parallax Measurements of an Infrared Dark Cloud MSXDC G034.43+00.24 with VERA
• Convergent flows and low-velocity shocks in DR21(OH)
• Trigonometric Parallaxes of Massive Star-Forming Regions: VII. G9.62+0.20 and the Expanding 3 KPC-ARM
• Forming an Early O-type Star Through Gas Accretion?
• A String of Radio Emission Associated with IRAS 16562-3959: A Collimated Jet Emanating from a Luminous Massive YSO
• Kinematic structure of massive star-forming regions - I. Accretion along filaments
• G11.92-0.61-MM2: A Bonafide Massive Prestellar Core?
• The Initial Conditions of Stellar Protocluster Formation: III. The Herschel counterparts of the Spitzer Dark Cloud catalogue
• The dense gas mass fraction in the W51 cloud and its protoclusters
• The Arches cluster out to its tidal radius: dynamical mass segregation and the effect of the extinction law on the stellar mass function
• On the kinematics of massive star forming regions: the case of IRAS 17233-3606
• First Parallax Measurements Towards a 6.7 GHz Methanol Maser with the Australian Long Baseline Array - Distance to G339.884-1.259
• Massive Star Formation
• New Distance and Revised Natures of High Mass Star Formation in G5.89-0.39
• W49A: A starburst triggered by expanding shells
• SiO excitation from dense shocks in the earliest stages of massive star formation
• Hot Core, Outflows and Magnetic Fields in W43-MM1 (G30.79 FIR 10)
• Looking for outflow and infall signatures in high mass star forming regions
• The Detection of Outflows in the IR-Quiet Molecular Core NGC 6334 I(North)
• Massive star formation in the GMC G345.5+1.0: Spatial distribution of the dust emission
• Tightening the belt: Constraining the mass and evolution in SDC335

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• ALMA-IMF I -- Investigating the origin of stellar masses: Introduction to the Large Program and first results
• ALMA survey of massive cluster progenitors from ATLASGAL. Limited fragmentation at the early evolutionary stage of massive clumps
• The search for high-mass protostars with ALMA revealed up to kilo-parsec scales (SPARKS): I. Indication for a centrifugal barrier in the environment of a single high-mass envelope
• A 6.7 GHz Methanol Maser Survey II. Low Galactic Latitudes
• Fragmentation and filaments at the onset of star and cluster formation: SABOCA 350 $\mu$m view of ATLASGAL selected massive clumps
• Sulphur-rich cold gas around the hot core precursor G328.2551-0.5321. An APEX unbiased spectral survey of the 2 mm, 1.2 mm, and 0.8 mm atmospheric windows
• Formation of stellar clusters
• ALMA-IMF XI: The sample of hot core candidates A rich population of young high-mass proto-stars unveiled by the emission of methyl formate
• Are massive dense clumps truly sub-virial? A new analysis using Gould Belt ammonia data
• ALMA-IMF. VII. First release of the full spectral line cubes: Core kinematics traced by DCN J=(3-2)
• Fingerprinting the effects of hyperfine structure on CH and OH far infrared spectra using Wiener filter deconvolution
• The effects of ionization feedback on star formation: A case study of the M16 H II region
• Large-scale Map of Millimeter-wavelength Hydrogen Radio Recombination Lines around a Young Massive Star Cluster
• ALMA-IMF X -- The core population in the evolved W33-Main (G012.80) protocluster
• Large-scale molecular gas distribution in the M17 cloud complex: dense gas conditions of massive star formation?
• ALMA-IMF XIII: N${}_2$H${}^{+}$ kinematic analysis on the intermediate protocluster G353.41
• The accretion burst of the massive young stellar object G323.46 -0.08
• The TOP-SCOPE survey of PGCCs: PMO and SCUBA-2 observations of 64 PGCCs in the 2nd Galactic Quadrant
• Complex organic molecules uncover deeply embedded precursors of hot cores
• HII regions and high-mass starless clump candidates I: Catalogs and properties
• ALMA-IMF XVI: Mass-averaged temperature of cores and protostellar luminosities in the ALMA-IMF protoclusters
• SPARKS II.: Complex organic molecules in accretion shocks around a hot core precursor
• Will ALMA Reveal the True Core Mass Function of Protoclusters?
• ALMA-IMF XVII -- Census and lifetime of high-mass prestellar cores in 14 massive protoclusters
• A survey of SiO $J=$ 1 -- 0 emission toward massive star-forming regions
• The evolution of the internal structure of massive star forming regions in the Milky Way as revealed by ALMA
• Sulfur-bearing molecules in a sample of early star-forming cores
• SCOTCH Search for Clandestine Optically Thick Compact HII regions II
• A new phase of massive star formation? A luminous outflow cavity centred on an infrared quiet core
• Looking for evidence of high-mass star formation at core scale in a massive molecular clump
• Search for High-Mass Protostellar Objects in Cold IRAS Sources
• Unveiling the substructure of the massive clump AGAL G035.1330$-$00.7450
• Properties of Contracting Massive Protostellar Cores