Relative Evolutionary Timescale of Hot Molecular Cores with Respect to Ultracompact H<scp>ii</scp>Regions
Relative Evolutionary Timescale of Hot Molecular Cores with Respect to Ultracompact H<scp>ii</scp>Regions
Using the Owens Valley and Nobeyama Radio Observatory interferometers, we carried out an unbiased search for hot molecular cores and ultracompact UC HII regions toward the high-mass star forming region G19.61--0.23. In addition, we performed 1.2 mm imaging with SIMBA, and retrieved 3.5 and 2 cm images from the VLA …