The JCMT Gould Belt Survey: Dense Core Clusters in Orion A

Abstract

The Orion A molecular cloud is one of the most well-studied nearby star-forming regions, and includes regions of both highly clustered and more dispersed star formation across its full extent. Here, we analyze dense, star-forming cores identified in the 850 μm and 450 μm SCUBA-2 maps from the JCMT Gould Belt Legacy Survey. We identify dense cores in a uniform manner across the Orion A cloud and analyze their clustering properties. Using two independent lines of analysis, we find evidence that clusters of dense cores tend to be mass segregated, suggesting that stellar clusters may have some amount of primordial mass segregation already imprinted in them at an early stage. We also demonstrate that the dense core clusters have a tendency to be elongated, perhaps indicating a formation mechanism linked to the filamentary structure within molecular clouds.

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Cited by in corpus (17)

• The Green Bank Ammonia Survey: Dense Cores Under Pressure in Orion A
• How do stars gain their mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star Forming Regions
• The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars V. A Characterization of Protostellar Multiplicity
• ALMA-IMF VI -- Investigating the origin of stellar masses: Core mass function evolution in the W43-MM2&MM3 mini-starburst
• Do star clusters form in a completely mass-segregated way?
• Mass segregation and sequential star formation in NGC 2264 revealed by Herschel
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• The JCMT Gould Belt Survey: A First Look at IC 5146
• Bird's eye view of molecular clouds in the Milky Way: I. Column density and star formation from sub-pc to kpc scales
• The HH 24 Complex: Jets, Multiple Star Formation, and Orphaned Protostars
• The CARMA-NRO Orion Survey: Filament Formation via Collision-Induced Magnetic Reconnection -- The Stick in Orion A
• The JCMT Gould Belt Survey: A First Look at the Auriga-California Molecular Cloud with SCUBA-2
• The initial mass function of stars and the star-formation rates of galaxies
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• The JCMT Gould Belt Survey Complete Core Catalogue: Core mass function variations between nearby molecular clouds