The SEDIGISM survey: Molecular cloud morphology. II. Integrated source properties
arXiv:2205.02253 · doi:10.1051/0004-6361/202142513
Abstract
The Structure, Excitation, and Dynamics of the Inner Galactic InterStellar Medium (SEDIGISM) survey has produced high (spatial and spectral) resolution CO (2-1) maps of the Milky Way. It has allowed us to investigate the molecular interstellar medium in the inner Galaxy at an unprecedented level of detail and characterise it into molecular clouds. In a previous paper, we have classified the SEDIGISM clouds into four morphologies. However, how the properties of the clouds vary for these four morphologies is not well understood. Here, we use the morphological classification of SEDIGISM clouds to find connections between the cloud morphologies, their integrated properties, and their location on scaling relation diagrams. We observe that ring-like clouds show the most peculiar properties, having, on average, higher masses, sizes, aspect ratios and velocity dispersions compared to other morphologies. We speculate that this is related to the physical mechanisms that regulate their formation and evolution, for example, turbulence from stellar feedback can often results in the creation of bubble-like structures. We also see a trend of morphology with virial parameter whereby ring-like, elongated, clumpy and concentrated clouds have virial parameters in a decreasing order. Our findings provide a foundation for a better understanding of the molecular cloud behaviour based on their measurable properties.
arXiv commentAccepted for publication in A&A. 28 pages (17 of Appendices), 32 figures, 6 tables
References in corpus (45)
- Characterizing interstellar filaments with Herschel in IC5146
- Re-examining Larson's Scaling Relationships in Galactic Molecular Clouds
- Structural Analysis of Molecular Clouds: Dendrograms
- Cores, filaments, and bundles: hierarchical core formation in the L1495/B213 Taurus region
- Physical properties of molecular clouds for the entire Milky Way disk
- Global Hierarchical Collapse In Molecular Clouds. Towards a Comprehensive Scenario
- Physical Properties and Galactic Distribution of Molecular Clouds identified in the Galactic Ring Survey
- Bias-free Measurement of Giant Molecular Cloud Properties
- The Second Survey of the Molecular Clouds in the Large Magellanic Cloud by NANTEN I: Catalog of Molecular Clouds
- Gravity or Turbulence? The velocity dispersion-size relation
- Cloud-Scale Molecular Gas Properties in 15 Nearby Galaxies
- Triggered star formation on the borders of the Galactic HII region RCW 120
- Triggered massive-star formation on the borders of Galactic HII regions. II. Evidence for the collect and collapse process around RCW 79
- The Magnetic Field in Taurus Probed by Infrared Polarization
- SEDIGISM: Structure, excitation, and dynamics of the inner Galactic interstellar medium
- Two Mass Distributions in the L 1641 Molecular Clouds: The Herschel connection of Dense Cores and Filaments in Orion A
- ATLASGAL -- A Galaxy-wide sample of dense filamentary structures
- Graph-based interpretation of the Molecular Interstellar Medium Segmentation
- The Physical Properties of Large-Scale Galactic Filaments
- The SEDIGISM survey: first data release and overview of the Galactic structure
- Resolving the fragmentation of high line-mass filaments with ALMA: the integral shaped filament in Orion A
- On the Three-Dimensional Structure of Local Molecular Clouds
- Feedback in Clouds II: UV Photoionisation and the first supernova in a massive cloud
- The integrated properties of the molecular clouds from the JCMT CO(3-2) High Resolution Survey
- From diffuse gas to dense molecular cloud cores
- What can simulated molecular clouds tell us about real molecular clouds?
- The SEDIGISM survey: Molecular clouds in the inner Galaxy
- The Elongations and Supersonic Motions of Molecular Clouds
- The dense cores and filamentary structure of the molecular cloud in Corona Australis. Herschel SPIRE and PACS observations from the Herschel Gould Belt Survey
- Self-gravitating Filament Formation from Shocked Flows: Velocity Gradients across Filaments
- SEDIGISM: The kinematics of ATLASGAL filaments
- The Milky Way Project Second Data Release: Bubbles and Bow Shocks
- SOFIA FEEDBACK survey: exploring the dynamics of the stellar wind driven shell of RCW 49
- Giant molecular clouds in the non-grand design spiral galaxy NGC 6946
- SEDIGISM-ATLASGAL: Dense Gas Fraction and Star Formation Efficiency Across the Galactic Disk
- The Galactic Census of High- and Medium-mass Protostars. IV. Molecular Clump Radiative Transfer, Mass Distributions, Kinematics, and Dynamical Evolution
- FEEDBACK from the NGC7538 HII region
- A Morphological Classification of 18190 Molecular Clouds Identified in CO Data from the MWISP Survey
- Velocity structure of the 50 pc-long NGC 6334 filamentary cloud: Hints of multiple compressions and their impact on the cloud properties?
- OGHReS: Large-scale filaments in the outer Galaxy
- J plots: a new method for characterizing structures in the interstellar medium
- The SEDIGISM survey: Molecular cloud morphology. I. Classification and star formation
- The segregation of starless and protostellar clumps in the Hi-GAL l=224deg region
- Magnetic Field Structures in Star Forming Regions: Mid-Infrared Imaging Polarimetry of K3-50
- Numerical Simulation and Completeness Survey of Bubbles in the Taurus and Perseus Molecular Clouds