PRELIMINARY-RESULTS OF A SURVEY OF ULTRACOMPACT H-II REGIONS

Ultracompact HII regions are small, dense regions of ionised gas surro unding high-mass stars which are still embedded in their natal molecul ar clouds. A survey of such regions has been commenced in an attempt t o improve our understanding of the processes of high-mass star formati on. The initial stages of the survey have involved selection of likely candidates from the IRAS Point Source Catalogue, correlation with rad io continuum emission at 4.85 GHz and subsequent observations of metha nol maser emission at 6.668 GHz. Preliminary results of the methanol m aser survey are given.