University of Hertfordshire

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  • SCOPE Collaboration
  • D. J. Eden
  • Tie Liu
  • Kee-Tae Kim
  • S. -Y. Liu
  • K. Tatematsu
  • J. Di Francesco
  • K. Wang
  • M. A. Thompson
  • G. A. Fuller
  • Di Li
  • I. Ristorcelli
  • Sung-ju Kang
  • N. Hirano
  • D. Johnstone
  • Y. Lin
  • J. H. He
  • P. M. Koch
  • Patricio Sanhueza
  • S. -L. Qin
  • Q. Zhang
  • P. F. Goldsmith
  • J. Evans II N.
  • J. Yuan
  • C. -P. Zhang
  • G. J. White
  • Minho Choi
  • Chang Won Lee
  • L. V. Toth
  • S. Mairs
  • H. -W. Yi
  • M. Tang
  • A. Soam
  • N. Peretto
  • M. R. Samal
  • M. Fich
  • H. Parsons
  • J. Malinen
  • G. J. Bendo
  • A. Rivera-Ingraham
  • H. -L. Liu
  • J. Wouterloot
  • P. S. Li
  • L. Qian
  • J. Rawlings
  • M. G. Rawlings
  • S. Feng
  • B. Wang
  • Dalei Li
  • M. Liu
  • A. Chrysostomou
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Original languageEnglish
Number of pages14
Pages (from-to)2895–2908
JournalMonthly Notices of the Royal Astronomical Society
Journal publication date1 May 2019
Volume485
Issue2
Early online date26 Feb 2019
DOIs
Publication statusPublished - 1 May 2019

Abstract

We present the first release of the data and compact-source catalogue for the JCMT Large Program SCUBA-2 Continuum Observations of Pre-protostellar Evolution (SCOPE). SCOPE consists of 850 μm continuum observations of 1235 Planck Galactic Cold Clumps (PGCCs) made with the Submillimetre Common-User Bolometer Array 2 on the James Clerk Maxwell Telescope. These data are at an angular resolution of 14.4 arcsec, significantly improving upon the 353 GHz resolution of Planck at 5 arcmin, and allowing for a catalogue of 3528 compact sources in 558 PGCCs. We find that the detected PGCCs have significant sub-structure, with 61 per cent of detected PGCCs having three or more compact sources, with filamentary structure also prevalent within the sample. A detection rate of 45 per cent is found across the survey, which is 95 per cent complete to Planck column densities of N H2 > 5 × 10 21 cm −2. By positionally associating the SCOPE compact sources with young stellar objects, the star formation efficiency, as measured by the ratio of luminosity to mass, in nearby clouds is found to be similar to that in the more distant Galactic Plane, with the column density distributions also indistinguishable from each other.

Notes

© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.

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