Follow-up observations of Planck cold clumps in $^{12}$CO/$^{13}$CO/C$^{18}$O (1--0) transitions

TL;DR

This study conducts molecular line observations of 674 Planck cold clumps to analyze their properties and early star formation stages, providing valuable data on cold core characteristics.

Contribution

It presents the first large-scale molecular line survey of Planck cold clumps, offering new insights into their physical conditions and star formation potential.

Findings

Identification of molecular gas in cold clumps

Characterization of physical conditions of the clumps

Insights into early star formation processes

Abstract

The Planck Early Cold Cores Catalog (ECC) provides an unbiased list of Galactic cold clumps, which form an ideal sample for studying the early phases of star formation (\cite[Planck Collabrators et al. 2011]{Planck_etal11}). To study their properties, we have carried out a molecular line ($^{12}$CO/$^{13}$CO/C$^{18}$O) survey towards 674 Planck cold clumps in the ECC with the PMO 13.7 m telescope.