Planck Cold Clumps in the λ Orionis Complex. II. Environmental Effects on Core Formation

Abstract

Based on the 850 µm dust continuum data from SCUBA-2 at James Clerk Maxwell Telescope (JCMT), we compare overall properties of Planck Galactic Cold Clumps (PGCCs) in the λ Orionis cloud to those of PGCCs in the Orion A and B clouds. The Orion A and B clouds are well known active star-forming regions, while the λ Orionis cloud has

Molecular Cloud Cores with a High Deuterium Fraction: Nobeyama Single-pointing Survey

“…The SCOPE survey discovered more than 3,000 PGCC cores across the Galaxy at 850 µm with SCUBA- 2 (Submillimetre Common-User Bolometer Array 2) on board JCMT (e.g., Yi et al 2018;Eden et al 2019). Yi et al (2018) identified 119 cores embedded in 96 PGCCs in the Orion region from JCMT SCOPE data and JCMT archive data. Eden et al (2019) released a compact source catalog using the JCMT SCOPE data, which contains 3,528 cores identified in 1,235 PGCCs from the Galactic plane to high latitudes.…”

“…Figure 1 shows the Galactic distribution of 207 SCUBA-2 cores, and the information on the targets is summarized in Table 1 with the core name, coordinate, dust temperature, H 2 column density, type of environment, and the related PGCC. The dust temperature is taken from the PGCC catalog and the H 2 column density is derived from the 850 µm peak intensity of the PGCC core (Yi et al 2018;Eden et al 2019) and the dust temperature. The 207 SCUBA-2 cores have dust temperatures rang-ing from 9.2 K to 22.4 K with the median value of 13.3 K. They have H 2 column densities of (0.17-12)×10 23 cm −2 with the median value of 8.2×10 22 cm −2 .…”

“…We investigate environments surrounding SCUBA-2 cores using the SIMBAD database. The Orion region, including the 113 SCUBA-2 cores, is a local active starforming region where both massive stars and low-mass stars are born (e.g., Yi et al 2018). This region consists of λ Orionis, Orion A, and B sub-regions, which include GMCs and many star-forming regions such as HII regions (e.g., LDN 1641 S3), star clusters (e.g., Collinder 69, Orion Nebula Cluster, NGC 2023, OMC 2), and nebulas (e.g., Orion KL,McNeil Nebula,IC 432).…”

SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution – survey description and compact source catalogue

“…Multiple papers have already been published using the SCOPE data, namely the maps and images (Liu et al 2016;Kim et al 2017;Tatematsu et al 2017;Juvela et al 2018a;Juvela et al 2018b;Liu et al 2018a,b;Tang et al 2018;Yi et al 2018;Zhang et al 2018).…”

“…Liu et al 2013;Meng, Wu & Liu 2013;Parikka et al 2015;Zhang et al 2016;Fehér et al 2017), as well as detections of line emission from dense gas tracers (Yuan et al 2016). There can be, however, low levels of active star formation within PGCCs (Tóth et al 2014;Liu et al 2015;Tang et al 2018;Yi et al 2018;Zhang et al 2018).…”