Multiscale, multiwavelength extraction of sources and filaments using separation of the structural components: getsf

Abstract

High-quality astronomical images delivered by modern ground-based and space observatories demand adequate, reliable software for their analysis and accurate extraction of sources, filaments, and other structures, containing massive amounts of detailed information about the complex physical processes in space. The multiwavelength observations with highly variable angular resolutions across wavebands require extraction tools that preserve and use the invaluable high-resolution information. This paper presents getsf, a new method for extracting sources and filaments in astronomical images using separation of their structural components, designed to handle multiwavelength sets of images and very complex filamentary backgrounds. The method spatially decomposes the original images and separates the structural components of sources and filaments from each other and from their backgrounds, flattening their resulting images. It spatially decomposes the flattened components, combines them over wavelengths, detects the positions of sources and skeletons of filaments, and measures the detected sources and filaments. This paper presents a realistic multiwavelength set of simulated benchmark images that can serve as the standard benchmark problem to evaluate qualities of source- and filament-extraction methods. This paper describes hires, an improved algorithm for the derivation of high-resolution surface densities from the multiwavelength far-infrared Herschel images. The algorithm allows creating the surface densities with angular resolutions that reach 5.6 arcsec, when the 70 micron image is used. The codes getsf and hires are illustrated by their applications to a variety of images, from the X-ray domain to the millimeter wavelengths.

arXiv comment37 pages, 25 figures, accepted by Astronomy & Astrophysics, final language-edited version

References in corpus (38)

• 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
• Characterizing interstellar filaments with Herschel in IC5146
• The persistent cosmic web and its filamentary structure I: Theory and implementation
• Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?
• Structural Analysis of Molecular Clouds: Dendrograms
• Common-Resolution Convolution Kernels for Space- and Ground-Based Telescopes
• Filamentary structures and compact objects in the Aquila and Polaris clouds observed by Herschel
• A GALEX Ultraviolet Imaging Survey of Galaxies in the Local Volume
• An ALMA study of the Orion Integral Filament: I. Evidence for narrow fibers in a massive cloud
• Magnetically Aligned HI Fibers and the Rolling Hough Transform
• The spine of the swan: A Herschel study of the DR21 ridge and filaments in Cygnus X
• Characterizing the properties of nearby molecular filaments observed with Herschel
• The ALMA Survey of 70 $\mu$m dark High-mass clumps in Early Stages (ASHES). I. Pilot Survey: Clump Fragmentation
• A census of dense cores in the Aquila cloud complex: SPIRE/PACS observations from the Herschel Gould Belt survey
• A SCUBA survey of the NGC 2068/2071 protoclusters
• A multi-scale, multi-wavelength source extraction method: getsources
• Source extraction and photometry for the far-infrared and sub-millimeter continuum in the presence of complex backgrounds
• FellWalker - a Clump Identification Algorithm
• The identification of filaments on far infrared and submillimiter images. Morphology, physical conditions and relation with star formation of filamentary structure
• The unexpectedly large proportion of high-mass star-forming cores in a Galactic mini-starburst
• First results from the Herschel Gould Belt Survey in Taurus
• A multi-scale filament extraction method: getfilaments
• Time Dependence of the Ultraviolet Radiation Field in the Local Interstellar Medium
• Characterizing filaments in regions of high-mass star formation: High-resolution submilimeter imaging of the massive star-forming complex NGC 6334 with ArTéMiS
• The Herschel view of the dense core population in the Ophiuchus molecular cloud
• The ALMA Survey of 70 $\mu \mathrm{m}$ Dark High-mass Clumps in Early Stages (ASHES). II: Molecular Outflows in the Extreme Early Stages of Protocluster Formation
• Probing fragmentation and velocity sub-structure in the massive NGC 6334 filament with ALMA
• Episodic accretion constrained by a rich cluster of outflows
• The Cygnus Loop's Distance, Properties, and Environment Driven Morphology
• The JCMT Gould Belt Survey: Dense Core Clusters in Orion A
• The core and stellar mass functions in massive collapsing filaments
• Uncertainties and biases of source masses derived from fits of integrated fluxes or image intensities
• Measurement of the X-ray proper motion in the south-east rim of RX J1713.7-3946
• The JCMT Gould Belt Survey: SCUBA-2 Data-Reduction Methods and Gaussian Source Recovery Analysis
• Background derivation and image flattening: getimages
• Template matching method for the analysis of interstellar cloud structure
• AZEuS: An Adaptive Zone Eulerian Scheme for Computational MHD

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• ALMA-IMF I -- Investigating the origin of stellar masses: Introduction to the Large Program and first results
• ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- XV. Steady Accretion from Global Collapse to Core Feeding in Massive Hub-filament System SDC335
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• ALMA-IMF. V. Prestellar and protostellar core populations in the W43 cloud complex
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• Supervised machine learning on Galactic filaments Revealing the filamentary structure of the Galactic interstellar medium
• Unraveling the observational signatures of cloud-cloud collision and hub-filament systems in W31
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• $Herschel$ investigation of cores and filamentary structures in the Perseus molecular cloud
• Structure and Kinematics of Sh2-138 -- A distant hub-filament system in the outer Galactic plane
• Inaccuracies and biases of the Gaussian size deconvolution for extracted sources and filaments
• A Deep Neural Network Approach to Compact Source Removal
• Scale-dependent surface and volume density properties of filaments in molecular clouds
• Interstellar filament detection and characterization: methods and implications for studies of magnetized interstellar medium
• The dominance of turbulence over magnetism in the formation of massive star cluster seeds
• A complete survey of filaments in Cygnus X