Sub-arcsecond near-infrared images reveal the density structure of the Orion Bar Ramsay Howat, S en_US Chrysostomou, A en_US Burton, Michael en_US Brand, P en_US 2021-11-25T13:06:46Z 2021-11-25T13:06:46Z 1998 en_US
dc.description.abstract The Orion Bar is one of the best studied photo-dissociation regions. Both the fact that it is close to us and that it is seen edge-on allow detailed analysis of the interaction of the newly formed stars in the Orion Nebula with the molecular cloud. Previous data sets from this region have provided a great deal of indirect evidence for a structure of low and high density 'clumps' on small scales (~0.1pc). A clumpy structure for the Bar is required in order to explain both the spatial extent of emission from molecular species, for example H2, and observed line ratios such as the CO7-6 / 14-13 ratio. Our observations use the strong density dependence of the ratio of the 1 - 0 S(1) and 2 - 1 S(1) lines of molecular hydrogen to explore the physical structure of the Bar. Images taken with the infrared camera, IRCAM3, on UKIRT show linear details to scales of ~0.5arcsecs extending over tens of arcseconds into the molecular cloud. The ratio of the line strengths from the two images allows the high density 'clumps' or filaments and the lower density 'inter-clump' medium to be identified. Analysis of these data will clarify the significance, or otherwise, of the clumps/filaments in controlling the chemistry and physics of the interstellar medium in Orion. en_US
dc.identifier.isbn 3826542592 en_US
dc.language English
dc.language.iso EN en_US
dc.publisher Shaker Verlag en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.title Sub-arcsecond near-infrared images reveal the density structure of the Orion Bar en_US
dc.type Conference Paper en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.description.notePublic Original inactive link: en_US Aachen, Germany en_US
unsw.relation.faculty Science
unsw.relation.ispartofconferenceLocation Zermatt, Switzerland en_US
unsw.relation.ispartofconferenceName 3rd Cologne-Zermatt Symposium: The Physics and Chemistry of the Interstellar Medium en_US
unsw.relation.ispartofconferenceProceedingsTitle The Physics and Chemistry of the Interstellar Medium - Abstract Book en_US
unsw.relation.ispartofconferenceYear 1998 en_US
unsw.relation.ispartofpagefrompageto 129-129 en_US
unsw.relation.originalPublicationAffiliation Ramsay Howat, S en_US
unsw.relation.originalPublicationAffiliation Chrysostomou, A en_US
unsw.relation.originalPublicationAffiliation Burton, Michael, Physics, Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Brand, P en_US School of Physics *
Resource type