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dc.contributor.authorLin, Yuxin
dc.contributor.authorLiu, Hauyu Baobab
dc.contributor.authorDale, James E.
dc.contributor.authorLi, D.
dc.contributor.authorBusquet, Gemma
dc.contributor.authorZhang, Zhi Yu
dc.contributor.authorGinsburg, Adam
dc.contributor.authorGalván-Madrid, Roberto
dc.contributor.authorKovács, Attila
dc.contributor.authorKoch, Eric
dc.contributor.authorQian, Lei
dc.contributor.authorWang, Ke
dc.contributor.authorLongmore, Steve
dc.contributor.authorChen, Huei Ru
dc.contributor.authorWalker, Daniel
dc.date.accessioned2018-10-31T02:09:18Z
dc.date.available2018-10-31T02:09:18Z
dc.date.issued2017-05-02
dc.identifier.citationLin , Y , Liu , H B , Dale , J E , Li , D , Busquet , G , Zhang , Z Y , Ginsburg , A , Galván-Madrid , R , Kovács , A , Koch , E , Qian , L , Wang , K , Longmore , S , Chen , H R & Walker , D 2017 , ' Cloud Structure of Three Galactic Infrared Dark Star-forming Regions from Combining Ground- and Space-based Bolometric Observations ' , The Astrophysical Journal , vol. 840 , no. 1 , 22 . https://doi.org/10.3847/1538-4357/aa6c67
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 12142333
dc.identifier.otherPURE UUID: 0b22cfc4-07da-4c77-bcc2-f8d14e9fd260
dc.identifier.otherScopus: 85019025623
dc.identifier.otherORCID: /0000-0001-5252-5771/work/62751044
dc.identifier.urihttp://hdl.handle.net/2299/20768
dc.description© 2017. The American Astronomical Society. All rights reserved.
dc.description.abstractWe have modified the iterative procedure introduced by Lin et al., to systematically combine the submillimeter images taken from ground-based (e.g., CSO, JCMT, APEX) and space (e.g., Herschel, Planck) telescopes. We applied the updated procedure to observations of three well-studied Infrared Dark Clouds (IRDCs): G11.11-0.12, G14.225-0.506, and G28.34+0.06, and then performed single-component, modified blackbody fits to each pixel to derive ∼10″ resolution dust temperature and column density maps. The derived column density maps show that these three IRDCs exhibit complex filamentary structures embedded with rich clumps/cores. We compared the column density probability distribution functions (N-PDFs) and two-point correlation (2PT) functions of the column density field between these IRDCs with several OB-cluster-forming regions. Based on the observed correlation between the luminosity-to-mass ratio and the power-law index of the N-PDF, and complementary hydrodynamical simulations for a 104 molecular cloud, we hypothesize that cloud evolution can be better characterized by the evolution of the (column) density distribution function and the relative power of dense structures as a function of spatial scales, rather than merely based on the presence of star-forming activity. An important component of our approach is to provide a model-independent quantification of cloud evolution. Based on the small analyzed sample, we propose four evolutionary stages, namely, cloud integration, stellar assembly, cloud pre-dispersal, and dispersed cloud. The initial cloud integration stage and the final dispersed cloud stage may be distinguished from the two intermediate stages by a steeper than -4 power-law index of the N-PDF. The cloud integration stage and the subsequent stellar assembly stage are further distinguished from each other by the larger luminosity-to-mass ratio (>40 ) of the latter. A future large survey of molecular clouds with high angular resolution may establish more precise evolutionary tracks in the parameter space of N-PDF, 2PT function, and luminosity-to-mass ratio.en
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.rightsOpen
dc.subjectISM: structure
dc.subjectstars: formation
dc.subjectsubmillimeter: ISM
dc.subjectAstronomy and Astrophysics
dc.subjectSpace and Planetary Science
dc.titleCloud Structure of Three Galactic Infrared Dark Star-forming Regions from Combining Ground- and Space-based Bolometric Observationsen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionUniversity of Hertfordshire
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85019025623&partnerID=8YFLogxK
dc.identifier.urlhttps://arxiv.org/abs/1704.06448
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2017-05-02
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/1538-4357/aa6c67
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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