Mopra observations of G305.2+0.2: massive star formation at different evolutionary stages? Walsh, Andrew en_US Burton, Michael en_US 2021-11-25T12:54:45Z 2021-11-25T12:54:45Z 2006 en_US
dc.description.abstract We have successfully used a new on-the-fly mapping technique with the Mopra radio telescope to image G305.2+0.2 in transitions of (CO)-C-13, HCO+, N2H+, CH3CN and CH3OH. All these species appear to be concentrated towards the infrared-quiet methanol maser site G305A (G305.21+0.21). We suggest that this region contains an extremely deeply embedded site of massive star formation, with comparable qualities to the low-mass Class 0 stage. The infrared-bright methanol maser site G305B (G305.21+0.20) also exhibits emission in all the mapped transitions, but always at a lower level. We suggest this is because it harbours a site of massive star formation older and more developed than G305.21+0.21. All transitions appear to be extended beyond the size of the Mopra beam (30 arcsec). (CO)-C-13 and HCO+ line wings are suggestive of an outflow in the region, but the spatial resolution of these data is insufficient to identify the powering source. A narrow-lined (1.6 km s(-1) compared to a typical line FWHM of 6.4 km s(-1)) N2H+ source (G305SW) is found 90 arcsec to the south-west of the main star-forming centres, which does not correspond to any CH3CN or CH3OH source, nor does it correspond well to (CO)-C-13 or HCO+ emission in the vicinity. We suggest this may be a massive, cold, quiescent and possibly pre-stellar core. en_US
dc.identifier.issn 0035-8711 en_US
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.subject.other masers en_US
dc.subject.other stars : formation en_US
dc.subject.other ISM : molecules en_US
dc.subject.other infrared : ISM en_US
dc.title Mopra observations of G305.2+0.2: massive star formation at different evolutionary stages? en_US
dc.type Journal Article en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.description.notePublic The Monthly Notices of the Royal Astronomical Society is published by Blackwell Publishing Ltd, en_US
unsw.identifier.doiPublisher en_US
unsw.relation.faculty Science
unsw.relation.ispartofissue 1 en_US
unsw.relation.ispartofjournal Monthly Notices of the Royal Astronomical Society en_US
unsw.relation.ispartofpagefrompageto 321-326 en_US
unsw.relation.ispartofvolume 365 en_US
unsw.relation.originalPublicationAffiliation Walsh, Andrew, Physics, Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Burton, Michael, Physics, Faculty of Science, UNSW en_US School of Physics *
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