dc.contributor.author | Lin, Yuxin | |
dc.contributor.author | Liu, Hauyu Baobab | |
dc.contributor.author | Dale, James E. | |
dc.contributor.author | Li, D. | |
dc.contributor.author | Busquet, Gemma | |
dc.contributor.author | Zhang, Zhi Yu | |
dc.contributor.author | Ginsburg, Adam | |
dc.contributor.author | Galván-Madrid, Roberto | |
dc.contributor.author | Kovács, Attila | |
dc.contributor.author | Koch, Eric | |
dc.contributor.author | Qian, Lei | |
dc.contributor.author | Wang, Ke | |
dc.contributor.author | Longmore, Steve | |
dc.contributor.author | Chen, Huei Ru | |
dc.contributor.author | Walker, Daniel | |
dc.date.accessioned | 2018-10-31T02:09:18Z | |
dc.date.available | 2018-10-31T02:09:18Z | |
dc.date.issued | 2017-05-02 | |
dc.identifier.citation | Lin , 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.issn | 0004-637X | |
dc.identifier.other | PURE: 12142333 | |
dc.identifier.other | PURE UUID: 0b22cfc4-07da-4c77-bcc2-f8d14e9fd260 | |
dc.identifier.other | Scopus: 85019025623 | |
dc.identifier.other | ORCID: /0000-0001-5252-5771/work/62751044 | |
dc.identifier.uri | http://hdl.handle.net/2299/20768 | |
dc.description | © 2017. The American Astronomical Society. All rights reserved. | |
dc.description.abstract | We 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.extent | 14 | |
dc.language.iso | eng | |
dc.relation.ispartof | The Astrophysical Journal | |
dc.subject | ISM: structure | |
dc.subject | stars: formation | |
dc.subject | submillimeter: ISM | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | Cloud Structure of Three Galactic Infrared Dark Star-forming Regions from Combining Ground- and Space-based Bolometric Observations | en |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85019025623&partnerID=8YFLogxK | |
dc.identifier.url | https://arxiv.org/abs/1704.06448 | |
rioxxterms.version | VoR | |
rioxxterms.versionofrecord | https://doi.org/10.3847/1538-4357/aa6c67 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |