dc.contributor.author | Rumble, D | |
dc.contributor.author | Hatchell, J | |
dc.contributor.author | Pattle, K | |
dc.contributor.author | Kirk, H | |
dc.contributor.author | Wilson, T | |
dc.contributor.author | Buckle, J | |
dc.contributor.author | Berry, DS | |
dc.contributor.author | Broekhoven-Fiene, H | |
dc.contributor.author | Currie, MJ | |
dc.contributor.author | Fich, M | |
dc.contributor.author | Jenness, T | |
dc.contributor.author | Johnstone, D | |
dc.contributor.author | Mottram, JC | |
dc.contributor.author | Nutter, D | |
dc.contributor.author | Pineda, JE | |
dc.contributor.author | Quinn, C | |
dc.contributor.author | Salji, C | |
dc.contributor.author | Tisi, S | |
dc.contributor.author | Walker-Smith, S | |
dc.contributor.author | Francesco, JD | |
dc.contributor.author | Hogerheijde, MR | |
dc.contributor.author | Ward-Thompson, D | |
dc.contributor.author | Bastien, P | |
dc.contributor.author | Bresnahan, D | |
dc.contributor.author | Butner, H | |
dc.contributor.author | Chen, M | |
dc.contributor.author | Chrysostomou, A | |
dc.contributor.author | Coude, S | |
dc.contributor.author | Davis, CJ | |
dc.contributor.author | Drabek-Maunder, E | |
dc.contributor.author | Duarte-Cabral, A | |
dc.contributor.author | Fiege, J | |
dc.contributor.author | Friberg, P | |
dc.contributor.author | Friesen, R | |
dc.contributor.author | Fuller, GA | |
dc.contributor.author | Graves, S | |
dc.contributor.author | Greaves, J | |
dc.contributor.author | Gregson, J | |
dc.contributor.author | Holland, W | |
dc.contributor.author | Joncas, G | |
dc.contributor.author | Kirk, JM | |
dc.contributor.author | Knee, LBG | |
dc.contributor.author | Mairs, S | |
dc.contributor.author | Marsh, K | |
dc.contributor.author | Matthews, BC | |
dc.contributor.author | Moriarty-Schieven, G | |
dc.contributor.author | Mowat, C | |
dc.contributor.author | Rawlings, J | |
dc.contributor.author | Richer, J | |
dc.contributor.author | Robertson, D | |
dc.contributor.author | Rosolowsky, E | |
dc.contributor.author | Sadavoy, S | |
dc.contributor.author | Thomas, H | |
dc.contributor.author | Tothill, N | |
dc.contributor.author | Viti, S | |
dc.contributor.author | White, GJ | |
dc.contributor.author | Wouterloot, J | |
dc.contributor.author | Yates, J | |
dc.contributor.author | Zhu, M | |
dc.date.accessioned | 2016-08-09T15:26:17Z | |
dc.date.issued | 2016-05-26 | |
dc.description.abstract | We present SCUBA-2 450{\mu}m and 850{\mu}m observations of the W40 complex in the Serpens-Aquila region as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) of nearby star-forming regions. We investigate radiative heating by constructing temperature maps from the ratio of SCUBA-2 fluxes using a fixed dust opacity spectral index, {\beta} = 1.8, and a beam convolution kernel to achieve a common 14.8" resolution. We identify 82 clumps ranging between 10 and 36K with a mean temperature of 20{\pm}3K. Clump temperature is strongly correlated with proximity to the external OB association and there is no evidence that the embedded protostars significantly heat the dust. We identify 31 clumps that have cores with densities greater than 105cm{^{-3}}. Thirteen of these cores contain embedded Class 0/I protostars. Many cores are associated with bright-rimmed clouds seen in Herschel 70 {\mu}m images. From JCMT HARP observations of the 12CO 3-2 line, we find contamination of the 850{\mu}m band of up to 20 per cent. We investigate the free-free contribution to SCUBA-2 bands from large-scale and ultracompact H ii regions using archival VLA data and find the contribution is limited to individual stars, accounting for 9 per cent of flux per beam at 450 {\mu}m or 12 per cent at 850 {\mu}m in these cases. We conclude that radiative heating has potentially influenced the formation of stars in the Dust Arc sub-region, favouring Jeans stable clouds in the warm east and fragmentation in the cool west. | en_GB |
dc.description.sponsorship | The JCMT has historically been operated by the Joint Astronomy
Centre on behalf of the Science and Technology Facilities Council
of the United Kingdom, the National Research Council of Canada
and the Netherlands Organisation for Scientific Research. Additional
funds for the construction of SCUBA-2 were provided by the
Canada Foundation for Innovation. The authors thank the JCMT
staff for their support of the GBS team in data collection and reduction
efforts. The programme under which the SCUBA-2 data used
in this paper were taken is MJLSG33. This work was supported
by an STFC studentship (Rumble) and the Exeter STFC consolidated
grant (Hatchell). The STARLINK software (Currie et al. 2014)
is supported by the East Asian Observatory. These data were reduced
using a development version from 2014 December (version
516b455a). This research used the services of the Canadian Advanced
Network for Astronomy Research (CANFAR) which in turn
is supported by CANARIE, Compute Canada, University of Victoria,
the National Research Council of Canada, and the Canadian
Space Agency. This research made use of APLpy, an open-source
plotting package for PYTHON hosted at http://aplpy.github.com, and
Matplotlib, a 2D graphics package used for PYTHON for application
development, interactive scripting, and publication-quality image
generation across user interfaces and operating systems. Herschel
is an ESA space observatory with science instruments provided
by European-led Principal Investigator consortia and with important
participation from NASA. We would like to thank James Di
Francesco for his internal review of this manuscript. | en_GB |
dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, 2016, Vol. 460 (4), pp. 4150 - 4175 | en_GB |
dc.identifier.doi | 10.1093/mnras/stw1100 | |
dc.identifier.uri | http://hdl.handle.net/10871/22938 | |
dc.language.iso | en | en_GB |
dc.publisher | Oxford University Press | en_GB |
dc.relation.url | http://adsabs.harvard.edu/abs/2016MNRAS.460.4150R | en_GB |
dc.rights | This is the final version of the article. Available from Oxford University Press via the DOI in this record. | en_GB |
dc.title | The JCMT Gould Belt Survey: evidence for radiative heating and contamination in the W40 complex | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2016-08-09T15:26:17Z | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.journal | Monthly Notices of the Royal Astronomical Society | en_GB |