Publication:
Australia Telescope Compact Array 1.2-cm observations of the massive star-forming region G305.2+0.2
Australia Telescope Compact Array 1.2-cm observations of the massive star-forming region G305.2+0.2
dc.contributor.author | Walsh, Andrew | en_US |
dc.contributor.author | Chapman, J | en_US |
dc.contributor.author | Burton, Michael | en_US |
dc.contributor.author | Wardle, M | en_US |
dc.contributor.author | Millar, Tom | en_US |
dc.date.accessioned | 2021-11-25T12:56:05Z | |
dc.date.available | 2021-11-25T12:56:05Z | |
dc.date.issued | 2007 | en_US |
dc.description.abstract | We report on Australia Telescope Compact Array observations of the massive star-forming region G305.2+0.2 at 1.2 cm. We detected emission in five molecules towards G305A, confirming its hot core nature. We determined a rotational temperature of 26 K for methanol. A non-local thermodynamic equilibrium excitation calculation suggests a kinematic temperature of the order of 200 K. A time-dependent chemical model is also used to model the gas-phase chemistry of the hot core associated with G305A. A comparison with the observations suggest an age of between 2 x 10(4) and 1.5 x 10(5) yr. We also report on a feature to the south-east of G305A which may show weak Class I methanol maser emission in the line at 24.933 GHz. The more evolved source G305B does not show emission in any of the line tracers, but strong Class I methanol maser emission at 24.933 GHz is found 3 arcsec to the east. Radio continuum emission at 18.496 GHz is detected towards two H II regions. The implications of the non-detection of radio continuum emission towards G305A and G305B are also discussed. | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/1959.4/38591 | |
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.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 | Australia Telescope Compact Array 1.2-cm observations of the massive star-forming region G305.2+0.2 | 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.relation.faculty | Science | |
unsw.relation.ispartofissue | 4 | en_US |
unsw.relation.ispartofjournal | Monthly Notices of the Royal Astronomical Society | en_US |
unsw.relation.ispartofpagefrompageto | 1703-1714 | en_US |
unsw.relation.ispartofvolume | 380 | en_US |
unsw.relation.originalPublicationAffiliation | Walsh, Andrew, Physics, Faculty of Science, UNSW | en_US |
unsw.relation.originalPublicationAffiliation | Chapman, J | en_US |
unsw.relation.originalPublicationAffiliation | Burton, Michael, Physics, Faculty of Science, UNSW | en_US |
unsw.relation.originalPublicationAffiliation | Wardle, M | en_US |
unsw.relation.originalPublicationAffiliation | Millar, Tom | en_US |
unsw.relation.school | School of Physics | * |