Characterization of dense Planck clumps observed with Herschel and SCUBA-2

Abstract

We aim to characterize a diverse selection of dense, potentially star-forming cores, clumps, and clouds within the Milky Way in terms of their dust emission and SF activity. We studied 53 fields that have been observed in the JCMT SCUBA-2 continuum survey SCOPE and have been mapped with Herschel. We estimated dust properties by fitting Herschel observations with modified blackbody functions, studied the relationship between dust temperature and dust opacity spectral index $\beta$, and estimated column densities. We extracted clumps from the SCUBA-2 850 $\mu$m maps with the FellWalker algorithm and examined their masses and sizes. Clumps are associated with young stellar objects found in several catalogs. We estimated the gravitational stability of the clumps with virial analysis. The clumps are categorized as unbound starless, prestellar, or protostellar. We find 529 dense clumps, typically with high column densities from (0.3-4.8)$\times 10^{22}$ cm${}^{-2}$, with a mean of (1.5$\pm$0.04)$\times 10^{22}$ cm${}^{-2}$, low temperatures ($T\sim$10-20 K), and estimated submillimeter $\beta$ =1.7$\pm$0.1. We detect a slight increase in opacity spectral index toward millimeter wavelengths. Masses of the sources range from 0.04 $M_{\odot }$ to 4259 $M_{\odot }$. Mass, linear size, and temperature are correlated with distance. Furthermore, the estimated gravitational stability is dependent on distance, and more distant clumps appear more virially bound. Finally, we present a catalog of properties of the clumps.Our sources present a large array of SF regions, from high-latitude, nearby diffuse clouds to large SF complexes near the Galactic center. Analysis of these regions will continue with the addition of molecular line data, which will allow us to study the densest regions of the clumps in more detail.

arXiv comment60 pages (article 18 pages), 73 figures To be published in A&A

References in corpus (129)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• Theory of Star Formation
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• The Herschel-SPIRE instrument and its in-flight performance
• 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
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• Astrophysics Source Code Library
• Planck 2013 results. XI. All-sky model of thermal dust emission
• Characterizing interstellar filaments with Herschel in IC5146
• On the Star Formation Rates in Molecular Clouds
• Hi-GAL: the Herschel infrared Galactic Plane Survey
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• SCUBA-2: The 10000 pixel bolometer camera on the James Clerk Maxwell Telescope
• The Star Formation Rate and Gas Surface Density Relation in the Milky Way: Implications for Extragalactic Studies
• Cores, filaments, and bundles: hierarchical core formation in the L1495/B213 Taurus region
• The global dust SED: Tracing the nature and evolution of dust with DustEM
• The Physics of Star Formation
• ATLASGAL --- properties of a complete sample of Galactic clumps
• SCUBA-2: iterative map-making with the Sub-Millimetre User Reduction Facility
• Star Formation Rates in Molecular Clouds and the Nature of the Extragalactic Scaling Relations
• SCUBA-2: on-sky calibration using submillimetre standard sources
• The Millennium Arecibo 21-cm Absorption Line Survey. IV. Statistics of Magnetic Field, Column Density, and Turbulence
• Hierarchical fragmentation and differential star formation in the Galactic "Snake": infrared dark cloud G11.11-0.12
• Filamentary structures and compact objects in the Aquila and Polaris clouds observed by Herschel
• Planck Early Results: Thermal dust in Nearby Molecular Clouds
• FAR-INFRARED SPECTRAL OBSERVATIONS OF THE GALAXY BY COBE
• The spine of the swan: A Herschel study of the DR21 ridge and filaments in Cygnus X
• The Effect of Line of Sight Temperature Variation and Noise on Dust Continuum Observations
• The ALMA Survey of 70 $\mu$m dark High-mass clumps in Early Stages (ASHES). I. Pilot Survey: Clump Fragmentation
• Planck Early Results: The Galactic Cold Core Population revealed by the first all-sky survey
• Properties of Hi-GAL clumps in the inner Galaxy]{The Hi-GAL compact source catalogue. I. The physical properties of the clumps in the inner Galaxy ($-71.0^{\circ }<\ell <67.0^{\circ }$)
• Inverse temperature dependence of the dust submillimeter spectral index
• Comparing Star Formation on Large Scales in the c2d Legacy Clouds: Bolocam 1.1 mm Dust Continuum Surveys of Serpens, Perseus, and Ophiuchus
• Fragmentation of Molecular Clumps and Formation of Protocluster
• A census of dense cores in the Aquila cloud complex: SPIRE/PACS observations from the Herschel Gould Belt survey
• The James Clerk Maxwell Telescope Legacy Survey of Nearby Star-forming Regions in the Gould Belt
• Far-infrared to millimeter astrophysical dust emission I: A model based on physical properties of amorphous solids
• Large-scale filaments associated with Milky Way spiral arms
• Multi-temperature mapping of dust structures throughout the Galactic Plane using the PPMAP tool with Herschel Hi-GAL data
• The Effect of Noise on the Dust Temperature - Spectral Index Correlation
• The JCMT Gould Belt Survey: First results from the SCUBA-2 observations of the Ophiuchus molecular cloud and a virial analysis of its prestellar core population
• FellWalker - a Clump Identification Algorithm
• The JCMT BISTRO Survey: The magnetic field strength in the Orion A filament
• An all-sky Support Vector Machine selection of WISE YSO Candidates
• A Massive Prestellar Clump Hosting no High-Mass Cores
• A census of dense cores in the Taurus L1495 cloud from the Herschel Gould Belt Survey
• A 24 Micron Point Source Catalog of the Galactic Plane from Spitzer/MIPSGAL
• The Herschel and JCMT Gould Belt Surveys: Constraining Dust Properties in the Perseus B1 Clump with PACS, SPIRE, and SCUBA-2
• Self-similar Fragmentation Regulated by Magnetic Fields in a Massive Star Forming Filament
• Submillimetre point sources from the Archeops experiment: Very Cold Clumps in the Galactic Plane
• Far-Infrared Dust Temperatures and Column Densities of the MALT90 Molecular Clump Sample
• Dust SEDs in the era of Herschel and Planck: a Hierarchical Bayesian fitting technique
• 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
• The Milky Way Project: A statistical study of massive star formation associated with infrared bubbles
• Planck Early Results: The submillimetre properties of a sample of Galactic cold clumps
• High-fidelity view of the structure and fragmentation of the high-mass, filamentary IRDC G11.11-0.12
• Two Mass Distributions in the L 1641 Molecular Clouds: The Herschel connection of Dense Cores and Filaments in Orion A
• Variations of the spectral index of dust emissivity from Hi-GAL observations of the Galactic plane
• ATLASGAL-selected massive clumps in the inner Galaxy III. Dust Continuum Characterization of an Evolutionary Sample
• The Physical Properties of Large-Scale Galactic Filaments
• CCS Imaging of the Starless Core L1544: An Envelope with Infall and Rotation
• Planck 2015 results. XXVIII. The Planck Catalogue of Galactic Cold Clumps
• Distinct Chemical Regions in the "Prestellar" Infrared Dark Cloud (IRDC) G028.23-00.19
• A holistic perspective on the dynamics of G035.39-00.33: the interplay between gas and magnetic fields
• Profiling filaments: comparing near-infrared extinction and submillimetre data in TMC-1
• Galactic cold cores VI. Dust opacity spectral index
• Gravity, Magnetic Field, and Turbulence: Relative Importance and Impact on Fragmentation in the Infrared Dark Cloud G34.43+00.24
• The degeneracy between dust colour temperature and spectral index. Comparison of methods for estimating the beta(T) relation
• The Herschel view of the on-going star formation in the Vela-C molecular cloud
• The TOP-SCOPE survey of Planck Galactic Cold Clumps: Survey overview and results of an exemplar source, PGCC G26.53+0.17
• Magnetic fields in nearby normal galaxies: Energy equipartition
• On column density thresholds and the star formation rate
• Variation in the dust emissivity index across M33 with Herschel and Spitzer (HerM33es)
• Galactic structure based on the ATLASGAL 870mum survey
• The degeneracy between the dust colour temperature and the spectral index. The problem of multiple chi^2 minima
• The JCMT Plane Survey: First complete data release - emission maps and compact source catalogue
• The Core Mass Function in the Massive Protocluster G286.21+0.17 revealed by ALMA
• Formation of Massive Protostellar Clusters -- Observations of Massive 70 $\mu$m Dark Molecular Clouds
• A catalogue of dense cores and young stellar objects in the Lupus complex based on Herschel Gould Belt Survey observations
• The dense cores and filamentary structure of the molecular cloud in Corona Australis. Herschel SPIRE and PACS observations from the Herschel Gould Belt Survey
• Profiles of interstellar cloud filaments. Observational effects in synthetic sub-millimetre observations
• Physical Properties of Dense Cores in the Rho Ophiuchi Main Cloud and A Significant Role of External Pressures in Clustered Star Formation
• Magnetic fields in the infrared dark cloud G34.43+0.24
• Two-level hierarchical fragmentation in the Orion Molecular Cloud 1 northern filament
• Herschel Observations of a Potential Core Forming Clump: Perseus B1-E
• Characterizing the properties of cluster precursors in the MALT90 survey
• Interactions of the Infrared bubble N4 with the surroundings
• Astrochemical Properties of Planck Cold Clumps
• Herschel far-infrared observations of the Carina Nebula complex II: The embedded young stellar and protostellar population
• Massive 70 micron quiet clumps I: evidence of embedded low/intermediate-mass star formation activity
• Small-scale structure in the Rosette molecular cloud revealed by Herschel
• SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution - Survey Description and Compact Source Catalogue
• Spatial distribution of star formation related to ionized regions throughout the inner Galactic plane
• Multi-scale dynamics in star-forming regions: the interplay between gravity and turbulence
• Structure and Fragmentation of a high line-mass filament: Nessie
• Triggered star formation surrounding Wolf-Rayet star HD 211853
• Detection and characterization of a 500 mic dust emissivity excess in the Galactic Plane using Herschel/Hi-GAL observations
• Planck Cold Clumps in the $\lambda$ Orionis complex. II. Environmental effects on core formation
• A statistical study of giant molecular clouds traced by ${}^{13}$CO, C${}^{18}$O, CS, and CH${}_3$OH in the disk of NGC 1068 based on ALMA observations
• The fragmentation properties of massive protocluster gas clumps: an ALMA study
• The JCMT Gould Belt Survey: First results from SCUBA-2 observations of the Cepheus Flare Region
• Dust spectrum and polarisation at 850 um in the massive IRDC G035.39-00.33
• Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps
• The JCMT Gould Belt Survey: A First Look at IC 5146
• Star Formation in Disk Galaxies. III. Does stellar feedback result in cloud death?
• Assessing the Performance of Molecular Gas Clump Identification Algorithms
• Thermal balance and comparison of gas and dust properties of dense clumps in the Hi-GAL survey
• The JCMT Gould Belt Survey: Evidence for radiative heating in Serpens MWC 297 and its influence on local star formation
• Physical properties and chemical composition of the cores in the California molecular cloud
• The properties of Planck Galactic cold clumps in the L1495 dark cloud
• A model for the minimum mass of bound stellar clusters and its dependence on the galactic environment
• Exploring the Dust Content of Galactic Winds with Herschel. I. NGC 4631
• Molecular Cloud Cores with High Deuterium Fraction: Nobeyama Single-Pointing Survey
• The Herschel/PACS Point Source Catalogue Explanatory Supplement
• First Investigation of the Combined Impact of Ionizing Radiation and Momentum Winds from a Massive Star on a Self-Gravitating Core
• A timeline for massive star-forming regions via combined observation of o-H${}_2$D${}^{+}$ and N${}_2$D${}^{+}$
• Galactic cold cores IX. Column density structures and radiative transfer modelling
• TRAO Survey of Nearby Filamentary Molecular clouds, the Universal Nursery of Stars (TRAO FUNS) I. Dynamics and Chemistry of L1478 in the California Molecular Cloud
• Multi-scale analysis of the Monoceros OB 1 star-forming region: I. The dense core population
• ALMA ACA and Nobeyama observations of two Orion cores in deuterated molecular lines
• Confirmation of Enhanced Long Wavelength Dust Emission in OMC 2/3
• Physical Properties of Galactic Planck Cold Cores revealed by the Hi-GAL survey
• Molecular environs and triggered star formation around the large Galactic infrared bubble N 24
• Three dimensional projection effects on chemistry in a Planck galactic cold clump
• The physical state of selected cold clumps
• Gathering dust: A galaxy-wide study of dust emission from cloud complexes in NGC 300
• Multiwavelength study of the G345.5+1.5 region

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• GGCHEMPY: A pure Python-based gas-grain chemical code for efficient simulation of interstellar chemistry
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