dc.contributor.author | Wilcock, L.A. | |
dc.contributor.author | Ward-Thompson, D. | |
dc.contributor.author | Kirk, J.M. | |
dc.contributor.author | Stamatellos, D. | |
dc.contributor.author | Whitworth, A. | |
dc.contributor.author | Elia, D. | |
dc.contributor.author | Fuller, G.A. | |
dc.contributor.author | DiGiorgio, A. | |
dc.contributor.author | Griffin, M.J. | |
dc.contributor.author | Molinari, S. | |
dc.contributor.author | Martin, P. | |
dc.contributor.author | Mottram, J. C. | |
dc.contributor.author | Peretto, N. | |
dc.contributor.author | Pestalozzi, M. | |
dc.contributor.author | Schisano, E. | |
dc.contributor.author | Plume, R. | |
dc.contributor.author | Smith, H. A. | |
dc.contributor.author | Thompson, M. A. | |
dc.date.accessioned | 2012-08-06T10:00:33Z | |
dc.date.available | 2012-08-06T10:00:33Z | |
dc.date.issued | 2012-05 | |
dc.identifier.citation | Wilcock , L A , Ward-Thompson , D , Kirk , J M , Stamatellos , D , Whitworth , A , Elia , D , Fuller , G A , DiGiorgio , A , Griffin , M J , Molinari , S , Martin , P , Mottram , J C , Peretto , N , Pestalozzi , M , Schisano , E , Plume , R , Smith , H A & Thompson , M A 2012 , ' Cores in infrared dark clouds (IRDCs) seen in the Hi-GAL survey between l=300 degrees and 330 degrees ' , Monthly Notices of the Royal Astronomical Society , vol. 422 , no. 2 , pp. 1071-1082 . https://doi.org/10.1111/j.1365-2966.2012.20680.x | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | PURE: 949423 | |
dc.identifier.other | PURE UUID: d4bdd189-c465-446d-a3ca-f6aae3e8a4d9 | |
dc.identifier.other | WOS: 000303912800013 | |
dc.identifier.other | Scopus: 84863419389 | |
dc.identifier.other | ORCID: /0000-0001-5392-909X/work/30970804 | |
dc.identifier.uri | http://hdl.handle.net/2299/8791 | |
dc.description.abstract | We have used data taken as part of the Herschel infrared Galactic Plane survey (Hi-GAL) to study 3171 infrared dark cloud (IRDC) candidates that were identified in the mid-IR (8 mu m) by Spitzer (we refer to these as 'Spitzer-dark' regions). They all lie in the range l = 300-330 degrees and vertical bar b vertical bar <= 1 degrees. Of these, only 1205 were seen in emission in the far-IR (250-500 mu m) by Herschel (we call these 'Herschel-bright' clouds). It is predicted that a dense cloud will not only be seen in absorption in the mid-IR, but will also be seen in emission in the far-IR at the longest Herschel wavebands (250-500 mu m). If a region is dark at all wavelengths throughout the mid-IR and far-IR, then it is most likely to be simply a region of lower background IR emission (a 'hole in the sky'). Hence, it appears that previous surveys, based on Spitzer and other mid-IR data alone, may have overestimated the total IRDC population by a factor of similar to 2. This has implications for estimates of the star formation rate in IRDCs in the Galaxy. We studied the 1205 Herschel-bright IRDCs at 250 mu m and found that 972 of them had at least one clearly defined 250-mu m peak, indicating that they contained one or more dense cores. Of these, 653 (67 per cent) contained an 8-mu m point source somewhere within the cloud, 149 (15 per cent) contained a 24-mu m point source but no 8-mu m source and 170 (18 per cent) contained no 24- or 8-mu m point sources. We use these statistics to make inferences about the lifetimes of the various evolutionary stages of IRDCs. | en |
dc.format.extent | 12 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.title | Cores in infrared dark clouds (IRDCs) seen in the Hi-GAL survey between l=300 degrees and 330 degrees | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
dc.date.embargoedUntil | 2012-12-01 | |
rioxxterms.version | AM | |
rioxxterms.versionofrecord | https://doi.org/10.1111/j.1365-2966.2012.20680.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |