2013A&A...552L..10S

We report on ALMA observations of continuum and molecular line emission with 0.4" resolution towards the high-mass star-forming region G35.20-0.74N. Two dense cores are detected in typical hot-core tracers (e.g., CH₃CN) 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 ∼18M_☉. This finding is consistent with the results of a recent study of the CO first overtone bandhead emission at 2.3µm towards G35.20-0.74N. The disk radius and mass are >2500 au and ∼3M_☉. To reconcile the observed bolometric luminosity (∼3x10⁴L_☉) with the estimated stellar mass of 18M_☉, we propose that the latter is the total mass of a binary system.