Home
Scholarly Works
SCOPE: SCUBA-2 Continuum Observations of...
Journal article

SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution – survey description and compact source catalogue

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 $\mu$m 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 $N_{\rm {H_{2}}}$ > 5 × 1021 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.

Authors

Eden DJ; Liu T; Kim K-T; Juvela M; Liu S-Y; Tatematsu K; Francesco JD; Wang K; Wu Y; Thompson MA

Journal

Monthly Notices of the Royal Astronomical Society, Vol. 485, No. 2, pp. 2895–2908

Publisher

Oxford University Press (OUP)

Publication Date

May 11, 2019

DOI

10.1093/mnras/stz574

ISSN

0035-8711

Contact the Experts team