ATCA 1.2 cm Observations of the Massive Star Forming Region G305.2+0.2

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dc.creatorWalsh, Andrew J.
dc.creatorChapman, Jacqueline F.
dc.creatorBurton, Michael G.
dc.creatorWardle, Mark
dc.creatorMillar, T. J.
dc.date2007-07-18
dc.date.accessioned2026-07-07T08:18:57Z
dc.date.available2026-07-07T08:18:57Z
dc.descriptionWe report on Australia Telescope 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-LTE excitation calculation suggests a kinematic temperature of order 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 x10^4 and 1.5 x10^5 years. We also report on a feature to the SE 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 \hii regions. The implications of the non-detection of radio continuum emission toward G305A and G305B are also discussed.
dc.description13 pages 11 figures
dc.identifierhttps://arxiv.org/abs/0707.2622
dc.identifierhttp://arxiv.org/abs/0707.2622
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/134613
dc.subjectAstrophysics
dc.titleATCA 1.2 cm Observations of the Massive Star Forming Region G305.2+0.2
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