Molecular Clump Extraction Algorithm Based on Local Density Clustering

Abstract

The detection and parametrization of molecular clumps is the first step in studying them. We propose a method based on Local Density Clustering algorithm while physical parameters of those clumps are measured using the Multiple Gaussian Model algorithm. One advantage of applying the Local Density Clustering to the clump detection and segmentation, is the high accuracy under different signal-to-noise levels. The Multiple Gaussian Model is able to deal with overlapping clumps whose parameters can be derived reliably. Using simulation and synthetic data, we have verified that the proposed algorithm could characterize the morphology and flux of molecular clumps accurately. The total flux recovery rate in ${}^{13}\mathrm{CO}$ (J=1-0) line of M16 is measured as 90.2\%. The detection rate and the completeness limit are 81.7\% and 20 K km s${}^{-1}$ in ${}^{13}\mathrm{CO}$ (J=1-0) line of M16, respectively.

arXiv commentAccepted for the publication in Research in Astronomy and Astrophysics (RAA). The python-based package will be available soon

References in corpus (16)

• The Milky Way in Molecular Clouds: A New Complete CO Survey
• Toward Understanding Massive Star Formation
• A General Theory of Turbulence-Regulated Star Formation, From Spirals to ULIRGs
• Structural Analysis of Molecular Clouds: Dendrograms
• The Star Formation Law in Atomic and Molecular Gas
• Low Virial Parameters in Molecular Clouds: Implications for High Mass Star Formation and Magnetic Fields
• Giant Molecular Filaments in the Milky Way
• Molecular line mapping of the giant molecular cloud associated with RCW 106 - III. Multi-molecular line mapping
• A large-scale CO survey of the Rosette Molecular Cloud: assessing the effects of O stars on surrounding molecular gas
• Assessing the Performance of Molecular Gas Clump Identification Algorithms
• The Bell Laboratories (13)CO Survey: Longitude-Velocity Maps
• Galactic Cold Cores. VIII. Filament formation and evolution: Filament properties in context with evolutionary models
• Structures of GMC W 37
• The Interstellar Medium: The Key Component in Galactic Evolution and Modern Cosmology
• A Cold and Diffuse Giant Molecular Filament in the Region of $l=41^{\circ }$, $b=-1^{\circ }$
• Gas infall in the massive star formation core G192.16-3.84

Cited by in corpus (2)

• FacetClumps: A Facet-based Molecular Clump Detection Algorithm
• Searching for Variable Stars in the Open Cluster NGC 2355 and Its Surrounding Region