Poster Presentation

The formation of high-mass binary systems by core/disk fragmentation: very early results.

Author(s): Patricio Sanhueza

Presenter: Patricio Sanhueza (NAOJ)

We are carrying out a survey of bright, known high-mass star forming regions at 0.06” (100-200 AU scales) in band 6 (230 GHz).
Five of 20 targets have already been observed in the compact configuration (~0.3”; 500-1000 AU resolution).
Interestingly, at 0.3” angular resolution some dust cores fragment in smaller condensations and others do not. Some condensations inside a core have completely different chemistry, likely reveling different evolutionary stages. To address the main science goal (if high-mass binaries are formed by core or disk fragmentation) we require the long baseline observations (not observed yet).
For now, we qualitatively compare the properties of the ALMA observations with previous observations and delineate the
analysis plan once the whole sample is observed at 0.06” angular resolution.