Gaseous CO abundance - An evolutionary tracer for molecular clouds

34Citations
Citations of this article
16Readers
Mendeley users who have this article in their library.

Abstract

Planck cold clumps are among the most promising objects to investigate the initial conditions of the evolution of molecular clouds. In this work, by combing the dust emission data from the survey of the Planck satellite with the molecular data of 12CO/13CO/C18O (1-0) lines from observations with the Purple Mountain Observatory 13.7 m telescope, we investigate the CO abundance, CO depletion, and CO-to-H2 conversion factor of 674 clumps in the early cold cores sample. The median and mean values of the CO abundance are 0.89 × 10-4 and 1.28 × 10 -4, respectively. The mean and median of CO depletion factor are 1.7 and 0.9, respectively. The median value of for the whole sample is 2.8 × 1020 cm-2 K-1 km-1 s. The CO abundance, CO depletion factor, and CO-to-H2 conversion factor are strongly (anti-)correlated to other physical parameters (e.g., dust temperature, dust emissivity spectral index, column density, volume density, and luminosity-to-mass ratio). To conclude, the gaseous CO abundance can be used as an evolutionary tracer for molecular clouds. © 2013. The American Astronomical Society. All rights reserved.

Cite

CITATION STYLE

APA

Liu, T., Wu, Y., & Zhang, H. (2013). Gaseous CO abundance - An evolutionary tracer for molecular clouds. Astrophysical Journal Letters, 775(1). https://doi.org/10.1088/2041-8205/775/1/L2

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free