Abstract
| - We report on ALMA observations of continuum and molecular line emission with 0. "4 resolution towards the high-mass star-forming region G35.20-0.74 N. Two dense cores are detected in typical hot-core tracers (e.g., CH 3CN) that reveal velocity gradients. In one of these cores, the velocity field can be fitted with an almost edge-on Keplerian disk rotating about a central mass of ~18 M⊙. This finding is consistent with the results of a recent study of the CO first overtone bandhead emission at 2.3 μm towards G35.20-0.74 N. The disk radius and mass are ≳2500 au and ~3 M⊙. To reconcile the observed bolometric luminosity (~3 × 10 4 L⊙) with the estimated stellar mass of 18 M⊙, we propose that the latter is the total mass of a binary system.
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