CO obs. of Planck Galactic cold clumps Virtual Observatory Resource

Authors
  1. Zhang C.
  2. Wu Y.
  3. Liu X.
  4. Qin S.-L.
  5. Liu T.
  6. Yuan J.
  7. Li D.
  8. Meng F.,Zhang T.
  9. Tang M.
  10. Yuan L.
  11. Zhou C.
  12. Esimbek J.
  13. Zhou Y.
  14. Chen P.
  15. Hu R.
  16. Published by
    CDS
Abstract

Sixty-five Planck Galactic cold clumps (PGCCs) from the first quadrant (IQuad) and 39 from the anticenter direction region (ACent) were observed in ^12^CO, ^13^CO, and C^18^O J=1-0 lines using the 13.7m telescope of the Purple Mountain Observatory. All the targets were detected in all three lines, except for 12 IQuad and 8 ACent PGCCs without C^18^O detection. Seventy-six and 49 velocity components were obtained in IQuad and ACent respectively; 146 cores were extracted from 76 IQuad clumps and 100 cores from 49 ACent clumps. The average Tex of IQuad cores and ACent cores is 12.4K and 12.1K, respectively. The average line widths of ^13^CO of IQuad cores and ACent cores are 1.55km/s and 1.77km/s, respectively. Among the detected cores, 24 in IQuad and 13 in ACent have asymmetric line profiles. The small blue excesses, ~0.03 in IQuad and 0.01 in ACent, indicate that star formation is not active in these PGCC cores. Power-law fittings of the core mass function to the high-mass end give indices of -0.57 in IQuad and -1.02 in ACent, which are flatter than the slope of the initial mass function given by Salpeter. The large turnover masses of 28M_{sun}_ for IQuad cores and 77M_{sun}_ for ACent cores suggest low star formation efficiencies in PGCCs. The correlation between virial mass and gas mass indicates that most PGCC cores in both regions are not likely pressure-confined.

Keywords
  1. interstellar-medium
  2. millimeter-astronomy
  3. submillimeter-astronomy
  4. molecular-clouds
  5. co-line-emission
  6. star-forming-regions
  7. galaxy-kinematics
Bibliographic source Bibcode
2020ApJS..247...29Z
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/247/29
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/247/29
Document Object Identifer DOI
doi:10.26093/cds/vizier.22470029

Access

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/247/29
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History

2020-06-25T08:56:49Z
Resource record created
2020-06-25T08:56:49Z
Created
2020-10-02T11:15:02Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr