Catalog of dense cores in the Orion A giant molecular cloud
Yoshito Shimajiri, Y. Kitamura, F. Nakamura, M. Momose, M. Saito, T., Tsukagoshi, M. Hiramatsu, T. Shimoikura, K. Dobashi, C. Hara, and R. Kawabe

TL;DR
This paper catalogs dense cores in the Orion A molecular cloud using 1.1 mm dust emission and C18O data, providing detailed properties and spatial relations, and making the data publicly available.
Contribution
It presents a comprehensive catalog of dense cores in Orion A with detailed physical properties and spatial analysis, based on new high-resolution millimeter observations.
Findings
Cataloged 619 dust cores and 235 C18O cores with detailed physical parameters.
Identified four types of spatial relations between dust and C18O cores.
Revealed that many cores are spatially unassociated, indicating complex core environments.
Abstract
We present Orion A giant molecular cloud core catalogs, which are based on 1.1 mm map with an angular resolution of 36 arcsec (sim 0.07 pc) and C18O (1-0) data with an angular resolution of 26.4 arcsec (sim 0.05 pc). We have cataloged 619 dust cores in the 1.1 mm map using the Clumpfind method. The ranges of the radius, mass, and density of these cores are estimated to be 0.01 - 0.20 pc, 0.6 - 1.2 times 10^2 Msun, and 0.3 times 10^4 - 9.2 times 10^6 cm^{-3}, respectively. We have identified 235 cores from the C18O data. The ranges of the radius, velocity width, LTE mass, and density are 0.13 -- 0.34 pc, 0.31 - 1.31 km s^{-1}, 1.0 - 61.8 Msun, and (0.8 - 17.5) times 10^3 cm^{-3}, respectively. From the comparison of the spatial distributions between the dust and C18O cores, four types of spatial relations were revealed: (1) the peak positions of the dust and C18O cores agree with each…
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