Star formation conditions in a Planck Galactic Cold Clump, G108.84-00.81

Abstract

We present the results from a series of ground-based radio observations toward a Planck Galactic Cold Clump (PGCC), PGCC G108.84-00.81, which is located in one curved filamentary cloud in the vicinity of an extended HII region Sh2-152 and SNR G109.1-1.0. PGCC G108.84-00.81 is mainly composed of two clumps, "G108-N" and "G108-S". In the 850 micron dust continuum emission map, G108-N is shown as one component while G108-S is fragmented into four components. There is no infrared source associated with G108-N while there are two infrared sources (IRS 1 and IRS 2) associated with G108-S. The total mass of G108-N is larger than the jeans mass, suggesting that G108-N is gravitationally unstable and a potential place for a future star formation. The clump properties of G108-N and G108-S such as the gas temperature and the column density, are not distinctly different. However, G108-S is slightly more evolved than G108-N, in the consideration of the CO depletion factor, molecular abundances, and association with infrared sources. G108-S seems to be affected by the compression from Sh2-152, while G108-N is relatively protected from the external effect

Accepted for publication in ApJS. 46 pages, 14 Figures

References in corpus (9)

• Analytical theory for the initial mass function: CO clumps and prestellar cores
• A Minimum Column Density of 1 g cm^-2 for Massive Star Formation
• SCUBA-2: iterative map-making with the Sub-Millimetre User Reduction Facility
• ATLASGAL --- towards a complete sample of massive star forming clumps
• A Classification Scheme for Young Stellar Objects Using the WIDE-FIELD INFRARED SURVEY EXPLORER AllWISE Catalog: Revealing Low-Density Star Formation in the Outer Galaxy
• The dangers of being trigger--happy
• TMC-1C: an accreting starless core
• A feedback-driven bubble G24.136+00.436: a possible site of triggered star formation
• Maser and Infrared Studies of Oxygen-Rich Late/Post-AGB Stars and Water Fountains: Development of a New Identification Method

Cited by in corpus (3)

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