Classification of COMPASS sources into "Young-Evolved" and "Isolated-Clustered".

Column density maps of COMPASS sources based on Herschel (Jørgensen et al. 2026).

Implementation

Sources:

• B335 IRS
• BHR71-IRS1
• HOPS 108
• HOPS 373-B
• L1551-IRS5
• NGC1333-IRAS4A
• NGC1333-SVS13a
• Serpens SMM1a
• Serpens emb 11 W
• Serpens South-MM18a
• V883-Ori
• IRAS 16293-2422 (observed with the ALMA Protostellar Interferometric Line Survey, PILS, Jørgensen et al. 2016)

Setup:

• Frequency range: 279.0-311.7 GHz (ALMA Band 7)
• Angular resolution: 0.3-0.5" (two tighter binaries targeted at 0.15-0.25")
• Spectral resolution: 0.4-0.5 km/s (488.281 kHz per channel)
• Sensitivity: 2.2-2.7 mJy/beam