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Occurrence Frequency of CO Outflows in Massive Protostellar Candidates
Kee-Tae Kim, S. E. Kurtz
We mapped 12 massive protostellar candidates in the CO J=2-1 line, which in combination with Zhang et al. (2005) completes an unbiased survey of outflows for all 48 sources with l>…
Molecular Counterparts of Ultracompact HII Regions with Extended Envelopes
Kee-Tae Kim, Bon-Chul Koo
We carried out 13CO J=1-0, CS, and C34S J=2-1 and J=3-2 line observations of molecular clouds associated with 16 ultracompact (UC) HII regions with extended envelopes. The molecula…
Hierarchical Structure of HII Regions - Ultracompact, Compact, and Extended Components
Kee-Tae Kim, Bon-Chul Koo
We have observed extended emission physically associated with 15 out of 16 UC HII regions with large ratios of single-dish to VLA fluxes. We discuss their implications for the age…
Interaction between Ionized and Molecular Gas in the Active Star-Forming Region W31
Kee-Tae Kim, Bon-Chul Koo
We have carried out 21 cm radio continuum, H76_αradio recombination line, and various (CO, ^13CO, CS, & C^34S) molecular line observations of the W31 complex. Our radio continuum d…
Radio Continuum and Recombination Line Study of UC HII Regions with Extended Envelopes
Kee-Tae Kim, Bon-Chul Koo
We have carried out 21 cm radio continuum observations of 16 UC HII regions using the VLA (D-array) in search of associated extended emission. We have also observed H76 recombi…
An Infrared and Radio Study of the Galactic Worm GW46.4+5.5
Kee-Tae Kim, Bon-Chul Koo
We have carried out high-resolution (~3') HI and CO line observations of GW46.4+5.5 and analyzed available IR and radio emission survey data. GW46.4+5.5 appears as a long filamenta…