Detection of a high-mass prestellar core candidate in W43-MM1

Abstract

Aims. To constrain the physical processes that lead to the birth of high-mass stars it is mandatory to study the very first stages of their formation. We search for high-mass analogs of low-mass prestellar cores in W43-MM1. Methods. We conducted a 1.3 mm ALMA mosaic of the complete W43-MM1 cloud, which has revealed numerous cores with ~ 2000 au FWHM sizes. We investigated the nature of cores located at the tip of the main filament, where the clustering is minimum. We used the continuum emission to measure the core masses and the ${}^{13}$CS(5-4) line emission to estimate their turbulence level. We also investigated the prestellar or protostellar nature of these cores by searching for outflow signatures traced by CO(2-1) and SiO(5-4) line emission, and for molecular complexity typical of embedded hot cores. Results. Two high-mass cores of ~ 1300 au diameter and ~ $60M_{\odot }$ mass are observed to be turbulent but gravitationally bound. One drives outflows and is associated with a hot core. The other core, W43-MM1\#6, does not yet reveal any star formation activity and thus is an excellent high-mass prestellar core candidate.

arXiv comment7 pages, 6 figures. Accepted for publication in A&A Letter

References in corpus (28)

• The Formation of Massive Stars from Turbulent Cores
• High-Mass Star and Massive Cluster Formation in the Milky Way
• 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
• Low Virial Parameters in Molecular Clouds: Implications for High Mass Star Formation and Magnetic Fields
• Hierarchical fragmentation and differential star formation in the Galactic "Snake": infrared dark cloud G11.11-0.12
• How Many Infrared Dark Clouds can form Massive Stars and Clusters?
• From Massive Protostars to a Giant HII Region: Submillimeter Imaging of the Galactic Mini-starburst W43
• Fragmentation and mass segregation in the massive dense cores of Cygnus X
• The Simultaneous Formation of Massive Stars and Stellar Clusters
• A multi-scale, multi-wavelength source extraction method: getsources
• The Dynamics of Massive Starless Cores with ALMA
• The dynamical properties of dense filaments in the infrared dark cloud G035.39-00.33
• The unexpectedly large proportion of high-mass star-forming cores in a Galactic mini-starburst
• W43: the closest molecular complex of the Galactic Bar?
• Temperature as a third dimension in column-density mapping of dusty astrophysical structures associated with star formation
• CO outflows from high-mass Class 0 protostars in Cygnus-X
• Hierarchical Cluster Assembly in Globally Collapsing Clouds
• The Parallax of W43: a Massive Star Forming Complex near the Galactic Bar
• Gas dynamics in Massive Dense Cores in Cygnus-X
• Low-velocity shocks traced by extended SiO emission along the W43 ridges: witnessing the formation of young massive clusters
• The earliest phases of high-mass star formation, as seen in NGC 6334 by \emph{Herschel}
• An Ordered Bipolar Outflow from a Massive Early-Stage Core
• The W43-MM1 mini-starburst ridge, a test for star formation efficiency models
• Tracing extended low-velocity shocks through SiO emission - Case study of the W43-MM1 ridge
• A Hunt for Massive Starless Cores
• Very Large Array Observations of Ammonia in Infrared-Dark Clouds II: Internal Kinematics

Cited by in corpus (21)

• The ALMA Survey of 70 $\mu$m dark High-mass clumps in Early Stages (ASHES). I. Pilot Survey: Clump Fragmentation
• ALMA-IMF I -- Investigating the origin of stellar masses: Introduction to the Large Program and first results
• Episodic accretion constrained by a rich cluster of outflows
• ALMA-IMF. V. Prestellar and protostellar core populations in the W43 cloud complex
• An ALMA study of hub-filament systems I. On the clump mass concentration within the most massive cores
• Collapse of turbulent massive cores with ambipolar diffusion and hybrid radiative transfer I. Accretion and multiplicity
• HII regions and high-mass starless clump candidates II. Fragmentation and induced star formation at ~0.025 pc scale: An ALMA continuum study
• The SQUALO project (Star formation in QUiescent And Luminous Objects) I: clump-fed accretion mechanism in high-mass star-forming objects
• Identification of prestellar cores in high-mass star forming clumps via ${\mathrm{H}}_2{\mathrm{D}}^{+}$ observations with ALMA
• Molecular analysis of a high-mass prestellar core candidate in W43-MM1
• Mother of Dragons: A Massive, quiescent core in the dragon cloud (IRDC G028.37+00.07)
• 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
• Lack of high-mass prestellar cores in the starless MDCs of NGC6334
• Fragmentation and kinematics in high-mass star formation: CORE-extension targeting two very young high-mass star-forming regions
• A Low-mass Cold and Quiescent Core Population in a Massive Star Protocluster
• ALMA-IMF IV -- A comparative study of the main hot cores in W43-MM1: detection, temperature and molecular composition
• ALMA-IMF XVII -- Census and lifetime of high-mass prestellar cores in 14 massive protoclusters
• Disk fragmentation around a massive protostar: a comparison of two three-dimensional codes
• HyGAL: Characterizing the Galactic ISM with observations of hydrides and other small molecules II. The absorption line survey with the IRAM 30 m telescope
• The Rosetta Stone Project. II. The correlation between star formation efficiency and L/M indicator for the evolutionary stages of star-forming clumps in post-processed radiative magnetohydrodynamics simulations
• Discs and outflows in the early phases of massive star formation: influence of magnetic fields and ambipolar diffusion