Mon. Not. R. Astron. Soc., 463, 1008-1025 (2016/November-3)
The JCMT and Herschel Gould Belt Surveys: a comparison of SCUBA-2 and Herschel data of dense cores in the Taurus dark cloud L1495.
WARD-THOMPSON D., PATTLE K., KIRK J.M., MARSH K., BUCKLE J., HATCHELL J., NUTTER D.J., GRIFFIN M.J., DI FRANCESCO J., ANDRE P., BEAULIEU S., BERRY D., BROEKHOVEN-FIENE H., CURRIE M., FICH M., JENNESS T., JOHNSTONE D., KIRK H., MOTTRAM J., PINEDA J., QUINN C., SADAVOY S., SALJI C., TISI S., WALKER-SMITH S., WHITE G., HILL T., KONYVES V., PALMEIRIM P. and PEZZUTO S.
Abstract (from CDS):
We present a comparison of Submillimetre Common User Bolometer Array-2 (SCUBA-2) 850-µm and Herschel 70-500-µm observations of the L1495 filament in the Taurus Molecular Cloud with the goal of characterizing the SCUBA-2 Gould Belt Survey (GBS) data set. We identify and characterize starless cores in three data sets: SCUBA-2 850-µm, Herschel 250-µm, and Herschel 250-µm spatially filtered to mimic the SCUBA-2 data. SCUBA-2 detects only the highest-surface-brightness sources, principally detecting protostellar sources and starless cores embedded in filaments, while Herschel is sensitive to most of the cloud structure, including extended low-surface-brightness emission. Herschel detects considerably more sources than SCUBA-2 even after spatial filtering. We investigate which properties of a starless core detected by Herschel determine its detectability by SCUBA-2, and find that they are the core's temperature and column density (for given dust properties). For similar-temperature cores, such as those seen in L1495, the surface brightnesses of the cores are determined by their column densities, with the highest-column-density cores being detected by SCUBA-2. For roughly spherical geometries, column density corresponds to volume density, and so SCUBA-2 selects the densest cores from a population at a given temperature. This selection effect, which we quantify as a function of distance, makes SCUBA-2 ideal for identifying those cores in Herschel catalogues that are closest to forming stars. Our results can now be used by anyone wishing to use the SCUBA-2 GBS data set.
© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
stars: formation - ISM: clouds - ISM: Individual objects: Taurus and L1495 - ISM: Individual objects: Taurus and L1495
VizieR on-line data:
<Available at CDS (J/MNRAS/463/1008): table1.dat table2.dat tablea1.dat tablea2.dat tablea3.dat tablea4.dat tableb1.dat>
Table 1: [WPK2016] SNN (Nos S1-S25). Table A1: [WPK2016] HNNN (Nos H1-H208). Table A2: [WPK2016] FNNN (Nos F1-F138). Table B1: [WPK2016] NNN (Nos N1-N42).
View the reference in ADS
To bookmark this query, right click on this link: simbad:2016MNRAS.463.1008W and select 'bookmark this link' or equivalent in the popup menu