Publication:
Photodissociation regions and star formation in the Carina nebula

dc.contributor.author Rathborne, Jill en_US
dc.contributor.author Burton, Michael en_US
dc.contributor.author Brooks, Kate en_US
dc.contributor.author Cohen, M en_US
dc.contributor.author Ashley, Michael en_US
dc.contributor.author Storey, John en_US
dc.date.accessioned 2021-11-25T13:06:25Z
dc.date.available 2021-11-25T13:06:25Z
dc.date.issued 2002 en_US
dc.description.abstract We have obtained wide-field thermal infrared (IR) images of the Carina nebula, using the SPIREX/Abu telescope at the South Pole. Emission from polycyclic aromatic hydrocarbons (PAHs) at 3.29 μm, a tracer of photodissociation regions (PDRs), reveals many interesting well-defined clumps and diffuse regions throughout the complex. Near-IR images (1-2 μm) , along with images from the Midcourse Space Experiment (MSX) satellite (8-21 μm) have been incorporated to study the interactions between the young stars and the surrounding molecular cloud in more detail. Two new PAH emission clumps have been identified in the Keyhole nebula, and have been mapped in 12CO(2-1) and (1-0) using the Swedish-ESO Submillimetre Telescope (SEST). Analysis of their physical properties reveals that they are dense molecular clumps, externally heated with PDRs on their surfaces and supported by external pressure in a similar manner to the other clumps in the region. A previously identified externally heated globule containing IRAS 10430−5931 in the southern molecular cloud shows strong 3.29-, 8- and 21-μm emission, the spectral energy distribution (SED) revealing the location of an ultracompact (UC) H ii region. The northern part of the nebula is complicated, with PAH emission intermixed with mid-IR dust continuum emission. Several point sources are located here, and through a two-component blackbody fit to their SEDs we have identified three possible UC H ii regions as well as a young star surrounded by a circumstellar disc. This implies that star formation in this region is ongoing and not halted by the intense radiation from the surrounding young massive stars. en_US
dc.identifier.issn 0035-8711 en_US
dc.identifier.uri http://hdl.handle.net/1959.4/39140
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/au/ en_US
dc.source Legacy MARC en_US
dc.title Photodissociation regions and star formation in the Carina nebula en_US
dc.type Journal Article en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.accessRights.uri http://purl.org/coar/access_right/c_14cb
unsw.identifier.doiPublisher http://dx.doi.org/10.1046/j.1365-8711.2002.05149.x en_US
unsw.relation.faculty Science
unsw.relation.ispartofissue 1 en_US
unsw.relation.ispartofjournal Monhtly Notices of the Royal Astronomical Society en_US
unsw.relation.ispartofpagefrompageto 85-97 en_US
unsw.relation.ispartofvolume 331 en_US
unsw.relation.originalPublicationAffiliation Rathborne, Jill, Physics, Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Burton, Michael, Physics, Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Brooks, Kate en_US
unsw.relation.originalPublicationAffiliation Cohen, M en_US
unsw.relation.originalPublicationAffiliation Ashley, Michael, Physics, Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Storey, John, Physics, Faculty of Science, UNSW en_US
unsw.relation.school School of Physics *
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